CN106936877B - A content distribution method, device and system - Google Patents

Abstract

The invention discloses a content distribution method, device and system, relates to the technical field of communication, and can solve the problem of the edge cache server access overload in the prior art. The content distribution method includes: the first central node obtains the content to be distributed in the first content distribution network CDN and the operation statistics data in the second CDN, and the operation statistics data is the number of visits to the content to be distributed in the second CDN Statistical data, the first central node belongs to the first CDN; the first central node obtains the distribution result of the content to be distributed according to the operation statistical data and the status information of all edge nodes in the first CDN, and the distribution result includes at least one determined to be distributed The edge cache server and the content to be distributed to each edge cache server to be distributed; the first central node distributes to each edge cache server to be distributed the content to be distributed to the edge cache server to be distributed according to the distribution result.

Description

A content distribution method, device and system

technical field

The present application relates to the field of communication technologies, and in particular to a content distribution method, device and system.

Background technique

The Content Delivery Network (CDN, Content Delivery Network) publishes content to the network "edge" closest to the user by superimposing a new network architecture on the existing network intercommunication protocol (IP, Internet Protocol) transmission network , so that users can get the content they need nearby, so as to solve the current situation of network congestion and improve the response speed of users accessing the network.

A CDN consists of multiple CDN nodes, and each CDN node generally consists of one or at least two cache server clusters. Multiple CDN nodes are divided into two types: central nodes and edge nodes. The central node has the functions of managing content, scheduling content, caching content and distributing content to edge nodes. At present, the content distribution method is that the central node distributes a piece of content to be distributed to each edge node in the network, so that there is an edge cache server in each edge node that stores a piece of content to be distributed, or the central node obtains a copy of the content according to the central node. The target distribution location information of the target distribution location information, and distribute a piece of content to be distributed to the edge node corresponding to the target distribution location information, so that there is an edge cache server in the edge node corresponding to the target distribution location information that stores a copy of the content to be distributed.

The above methods can distribute the content to be distributed to an edge cache server in the edge node closest to the user, so that the user can obtain the content to be distributed nearby, but for each edge cache server that obtains the content to be distributed, the edge The content to be distributed stored by the cache server may not be able to meet the user's access requirements, resulting in an overload of access to the edge cache server.

Contents of the invention

Embodiments of the present invention provide a content distribution method, device and system, which can solve the problem of overloading access to edge cache servers in the prior art.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

An embodiment of the present invention provides a method for content distribution. First, the first central node obtains the content to be distributed in the first content distribution network CDN and the operation statistics data in the second CDN, the operation statistics data being in the The statistical data of the visit volume of the content to be distributed in the second CDN, the first central node belongs to the first CDN; then, the first central node is based on the acquired operational statistical data and State information of all edge nodes in the first CDN, obtain at least one determined edge cache server to be distributed and the content to be distributed for each edge cache server to be distributed; finally, the first central node is each The edge cache server to be distributed distributes the content to be distributed by the edge cache server to be distributed.

The operational statistical data is the statistical data of the visit volume of the content to be distributed in the second CDN. The operational statistical data can truly reflect the visit volume information of different dimensions of the content to be distributed in the second CDN. In the embodiment of the present invention, the first central node With reference to the operational statistical data, the determined at least one edge cache server to be distributed in the first CDN and the distribution of the content to be distributed for each edge cache server to be distributed can also truly and accurately reflect the status of the content to be distributed in the first CDN. In this way, the traffic information of the CDN not only improves the utilization rate of the storage space of each edge cache server to be distributed, but also can meet the access requirements of users, and solves the problem of the edge cache server access overload in the prior art.

Specifically, the first central node acquires the content to be distributed in the first CDN and the operation statistics data in the second CDN, including: the first central node receives the content sent by the content server and includes the content to be distributed The content identifier, the storage location information of the content to be distributed in the content server, and the content distribution message of the operation statistical data; the first central node downloads the to-be-distributed content according to the content identifier and the storage location information. Distribute content.

Optionally, the operational statistical data includes at least one reference location information and access volume information of the content to be distributed at each reference location information, and the status information includes the location of each edge node in the first CDN information.

Correspondingly, the first central node obtains the distribution result of the content to be distributed according to the operation statistical data and the status information of all the edge nodes in the first CDN, specifically including: the first central node obtains the distribution result of the content to be distributed according to the preset Determine at least one target reference location information from all the reference location information according to the rules and the traffic information of each reference location information of the content to be distributed; Select the location information of an edge node to be distributed for each purpose reference location information, the edge node to be distributed includes at least one edge cache server; the first central node is based on the location information of each edge node to be distributed, for each The edge nodes to be distributed determine at least one edge cache server to be distributed.

When the operation statistics data includes the access volume information of the content to be distributed in the second CDN in a geographical dimension, the first central node may determine the edge cache server to be distributed according to the operation statistics data.

Specifically, for the first destination reference location information in the at least one destination reference location information, the first central node selects the first target location information for the first destination reference location information from the location information of all edge nodes. Distributing the location information of the edge node specifically includes: if the location information of the edge node among all the edge nodes is the same as the first destination reference location information, then the first central node determines the location information of the edge node as The location information of the first edge node to be distributed; if the location information of all the edge nodes is different from the first destination reference location information, the first central node selects from the location information of all the edge nodes Selecting the location information of the first edge node to be distributed, wherein the distance between the location information of the first edge node to be distributed and the first destination reference location information is the smallest.

Further, the content distribution message also includes target distribution location information.

Correspondingly, after the first central node selects the location information of an edge node to be distributed from the location information of all edge nodes for each target reference location information, and the first central node Before the location information of the node determines at least one edge cache server to be distributed, the content distribution method further includes: if the location information of the target distribution edge node is not included in the location information of at least one edge node to be distributed, the first The central node determines the location information of the destination distribution edge node as the location information of the edge node to be distributed, and the destination distribution edge node is included in the parent distribution location information.

It can be understood that if the content distribution message includes the destination distribution location information, it means that all destination distribution edge nodes included in the destination distribution location information need to distribute the content to be distributed. The to-be-distributed edge node determined according to the operation statistics data may not contain the destination distribution edge node. In this case, the destination distribution edge node needs to be set as the to-be-distributed edge node.

Further, the status information also includes the storage space utilization rate of each edge cache server in the first CDN, the attribute value of each edge cache server, and the storage space value of each edge cache server.

Correspondingly, for the location information of the first edge node to be distributed in the location information of the at least one edge node to be distributed, the first central node is the first edge node to be distributed according to the location information of the first edge node to be distributed. The distribution edge node determines at least one edge cache server to be distributed, which specifically includes: the first central node determines that the server needs to be The first edge node to be distributed distributes the number N of the content to be distributed, N≥1; the first central node selects from all edge cache servers included in the first edge node to be distributed according to preset conditions, Selecting X edge cache servers as candidate edge cache servers, wherein the preset condition is that the storage space utilization of the edge cache servers is less than or equal to a second preset threshold, and the attribute value of the edge cache servers is less than a third preset threshold. Set the threshold, X≥1; if N≥X, then the first central node determines X candidate edge cache servers as edge cache servers to be distributed; if N<X, then the first central node determines from the X N candidate edge cache servers are selected from the candidate edge cache servers, and the N candidate edge cache servers are determined as edge cache servers to be distributed, and the N candidate edge cache servers are the X candidate edge cache servers The top N items are arranged in descending order according to the available storage space.

After determining the edge nodes to be distributed, the first central node determines the edge cache server to be distributed according to the storage space utilization rate of the edge cache servers included in each edge node to be distributed.

Optionally, the operation statistical data includes information about the number of views of the content to be distributed at least one bit rate and information about the number of views of all content segments of the content to be distributed at each bit rate.

Correspondingly, for the first edge cache server to be distributed among at least one edge cache server to be distributed, the method for the first central node to determine the content to be distributed by the first edge cache server to be distributed includes: the first A central node determines the available storage space value of the first edge cache server to be distributed; if the available storage space value of the first edge cache server to be distributed is smaller than the occupied space value of the content to be distributed, the first The central node determines that at least one content fragment is required for the second code rate according to the traffic information of the content to be distributed at least one bit rate and the traffic information of all content fragments of the content to be distributed at each code rate. For the content distributed by the edge cache server to be distributed, the occupied space value of the at least one content fragment is equal to the available storage space value of the first edge cache server to be distributed; if the available storage space of the first edge cache server to be distributed If the space value is greater than or equal to the occupied space value of the content to be distributed, the first central node determines the content to be distributed as content that needs to be distributed by the first edge cache server to be distributed.

Combining the available storage space of the edge cache server to be distributed and the access information of each content fragment, determine the content that needs to be distributed for the edge cache server to be distributed, while meeting the storage space of the edge cache server to be distributed, it can also meet the User's access needs.

Specifically, the first central node determines at least one content segment according to the traffic information of the content to be distributed at least one code rate and the traffic information of all content segments of the content to be distributed at each code rate. The slice is the content to be distributed by the first edge cache server to be distributed, which specifically includes: the first central node selects the code rate with the largest number of visits; the first central node selects the code rate with the largest number of visits and the access information of all content segments of the content to be distributed at the code rate, and determine the content segment with the largest access information in the code rate as the content that needs to be distributed by the first edge cache server to be distributed, Until the value of the available storage space of the first edge cache server to be distributed is zero.

In the embodiment of the present invention, the first central node preferentially selects the content to be distributed with the code rate with the largest traffic information, and selects the content segment with the largest traffic information among all the content fragments with the code rate with the largest traffic information. piece, determine the content piece as content that needs to be distributed by the first edge cache server to be distributed, so as to ensure that the first edge cache server to be distributed can meet the user's access requirements.

Optionally, the operational statistical data includes at least one statistical period and information on the number of visits of the content to be distributed in each statistical period.

Correspondingly, after the first central node distributes to each edge cache server to be distributed the content that needs to be distributed to the edge cache server to be distributed according to the distribution result, the content distribution method further includes : The first central node determines the protection period of each edge cache server to be distributed in the first CDN of the content to be distributed according to the traffic information of the content to be distributed in each statistical period; the first center The node sends a setting request to each edge cache server to be distributed, the setting message includes the protection period of the content to be distributed in the edge cache server to be distributed, and the setting message is used to instruct each edge cache server to be distributed to set its own The protection period of the distributed content, the distributed content belongs to the to-be-distributed content.

The operational statistical data includes the traffic information of the content to be distributed in each statistical period. Based on this information, the first central node sets the content protection period of each edge cache server to be distributed in the first CDN, which can prevent the traffic from being The content that rises but has passed the protection period is eliminated, and it can also prevent the situation that the access volume has become very low but the content that is still within the protection period still occupies the cache space.

Further, after the first central node distributes to each edge cache server to be distributed the content that needs to be distributed to the edge cache server to be distributed according to the distribution result, and determines the Receive the confirmation message sent by each edge cache server to be distributed before the protection period of each edge cache server to be distributed in the first CDN.

Another embodiment of the present invention provides a content distribution method, including: a content server acquires operation statistics data, the operation statistics data is the statistics data of the visit volume of the content to be distributed in the second content distribution network CDN; the content server Sending a content distribution message including the content identifier of the content to be distributed, the storage location information of the content to be distributed in the content server, and the operation statistical data to the first central node, for instructing the first central node The content to be distributed is distributed in the first CDN, and the first central node belongs to the first CDN.

In the embodiment of the present invention, when the content server sends the content distribution message to the first central node, in addition to sending the content identification of the content to be distributed and the storage location information of the content to be distributed in the content server to the first central node, the In the second content distribution network CDN, the statistical data of the visit volume of the content to be distributed is sent to the first central node, so that the first central node can refer to the visit volume information of the content to be distributed when distributing the content to be distributed in the first CDN, accurately Determine the edge cache server to be distributed in the first CDN and the content to be distributed for each edge cache server to be distributed, thereby improving the storage space utilization rate of each edge cache server to be distributed, and can meet the user's access requirements The method solves the problem of the edge cache server access overload in the prior art.

Specifically, the content server obtains operation statistics data, which specifically includes: if the content server obtains the identifier of the second CDN in the local content deployment operation management table, then the content server sends the operation statistics to the second central node request message, the second central node belongs to the second CDN, the local content deployment operation management table includes the mapping relationship between the identifier of the second CDN and the content identifier of the content to be distributed, and the operation statistics request message Including the content identifier of the content to be distributed, the operation statistics request message is used to request the second central node to statistically analyze the traffic information of the content to be distributed in the second CDN; the content server receives the second CDN An operation statistics response message sent by the central node, where the operation statistics response message includes the operation statistics data.

Further, the operation statistics request message further includes statistical parameters, and the operation statistics message is used to request the second central node to statistically analyze the traffic information of the content to be distributed in the second CDN according to the statistical parameters, The statistical parameters include at least one of regional granularity information, code rate, time stamp information, and traffic statistics period.

An embodiment of the present invention provides a central node, including: an acquisition unit, a determination unit, and a distribution unit.

Specifically, the functions realized by each unit module provided by the embodiment of the present invention are as follows:

An acquisition unit, configured to acquire content to be distributed in the first content distribution network CDN and operation statistics data in the second CDN, the operation statistics data being access to the content to be distributed in the second CDN The amount of statistical data that the central node belongs to the first CDN.

A determining unit, configured to obtain a distribution result of the content to be distributed according to the operational statistical data obtained by the obtaining unit and the state information of all edge nodes in the first CDN, the distribution result including at least one determined The edge cache servers to be distributed and the content to be distributed for each edge cache server to be distributed.

The distributing unit is configured to, according to the distribution result determined by the determining unit, distribute to each edge cache server to be distributed the content that needs to be distributed to the edge cache server to be distributed among the content to be distributed.

For the technical effects of the central node provided by the embodiments of the present invention, reference may be made to the technical effects of the first central node described in the content distribution method performed by the first central node in the above embodiments, and details are not repeated here.

Further, the central node also includes a receiving unit,

The receiving unit is configured to receive a content distribution message sent by a content server, where the content distribution message includes the content identifier of the content to be distributed, storage location information of the content to be distributed in the content server, and the operation statistics data.

Further, the central node also includes a download unit,

The downloading unit is configured to download the content to be distributed according to the content identifier and the storage location information received by the receiving unit.

Optionally, the operational statistical data includes at least one reference location information and access volume information of the content to be distributed at each reference location information, and the status information includes the location of each edge node in the first CDN information.

Further, the determining unit is specifically used for:

Determining at least one target reference location information from the location information of all reference edge nodes according to preset rules and the visit volume information of each reference location information of the content to be distributed;

Selecting the location information of an edge node to be distributed for each purpose reference location information from the location information of all the edge nodes, the edge node to be distributed includes at least one edge cache server;

According to the location information of each edge node to be distributed, at least one edge cache server to be distributed is determined for each edge node to be distributed.

Further, for the first target reference position information in the at least one target reference position information, the determining unit is specifically configured to:

If the position information of the edge node among all the edge nodes is the same as the first destination reference position information, then determine the position information of the edge node as the position information of the first edge node to be distributed;

If the location information of all the edge nodes is different from the first destination reference location information, select the location information of the first edge node to be distributed from the location information of all the edge nodes, wherein the first The distance between the location information of an edge node to be distributed and the first destination reference location information is the smallest.

Further, the content distribution message also includes target distribution location information.

Further, the determining unit is further configured to, after selecting a location information of an edge node to be distributed for each target reference location information from the location information of all edge nodes, and for each edge node to be distributed Before the location information determines at least one edge cache server to be distributed, if the location information of the destination distribution edge node is not included in the location information of at least one to-be-distributed edge node, then determine the location information of the destination distribution edge node as the location information to be distributed The location information of the edge node, the destination distribution edge node is included in the parent distribution location information.

Further, the status information also includes the storage space utilization rate of each edge cache server in the first CDN, the attribute value of each edge cache server, and the storage space value of each edge cache server.

Further, for the location information of the first edge node to be distributed in the location information of the at least one edge node to be distributed, the determining unit is specifically configured to:

According to the traffic information of the content to be distributed on the first edge node to be distributed and a first preset threshold, determine the number N of the content to be distributed that needs to be distributed to the first edge node to be distributed, N≥1 ;

Select X edge cache servers as candidate edge cache servers from all edge cache servers included in the first edge node to be distributed according to preset conditions, wherein the preset condition is the storage space utilization rate of the edge cache servers less than or equal to the second preset threshold, and the attribute value of the edge cache server is less than the third preset threshold, X≥1;

If N≥X, determine X candidate edge cache servers as edge cache servers to be distributed;

If N<X, select N candidate edge cache servers from the X candidate edge cache servers, and determine the N candidate edge cache servers as edge cache servers to be distributed, and the N candidate edge cache servers The servers are the first N of the X candidate edge cache servers arranged in descending order of available storage space.

Optionally, the operation statistical data includes information about the number of views of the content to be distributed at least one bit rate and information about the number of views of all content segments of the content to be distributed at each bit rate.

Further, for the first edge cache server to be distributed among at least one edge cache server to be distributed, the determining unit is specifically configured to:

Determine the value of the available storage space of the first edge cache server to be distributed;

If the value of the available storage space of the first edge cache server to be distributed is smaller than the value of the occupied space of the content to be distributed, according to the access volume information of the content to be distributed at least one code rate and the content to be distributed every The traffic information of all content fragments of a code rate, determine that at least one content fragment is the content that needs to be distributed by the first edge cache server to be distributed, and the occupied space value of the at least one content fragment is equal to the value of the first edge cache server to be distributed. - The value of the available storage space of the edge cache server to be distributed;

If the value of the available storage space of the first edge cache server to be distributed is greater than or equal to the value of the occupied space of the content to be distributed, the content to be distributed is determined to be distributed by the first edge cache server to be distributed content.

Further, the determining unit is specifically used for:

Select the code rate with the largest number of visits;

According to the code rate with the largest number of visits and the number of visits information of all content fragments of the content to be distributed at this code rate, determine the content fragment with the largest number of visits information in the code rate as the first The content distributed by the edge cache server to be distributed until the value of the available storage space of the first edge cache server to be distributed is zero.

Optionally, the operational statistical data includes at least one statistical period and information on the number of visits of the content to be distributed in each statistical period.

Further, the determining unit is further configured to, after the distributing unit distributes to each edge cache server to be distributed the content that needs to be distributed to the edge cache server to be distributed in the content to be distributed according to the distribution result, According to the traffic information of the content to be distributed in each statistical period, the protection period of each edge cache server to be distributed in the first CDN is determined.

Further, the central node also includes a sending unit,

The sending unit is configured to send a setting request to each edge cache server to be distributed, the setting message includes the protection period of the content to be distributed determined by the determination unit in the edge cache server to be distributed, the setting message It is used to instruct each edge cache server to be distributed to set a protection period for the distributed content, and the distributed content belongs to the content to be distributed.

Further, the receiving unit is further configured to: after the determining unit distributes, for each edge cache server to be distributed, the content that needs to be distributed to the edge cache server to be distributed in the content to be distributed according to the distribution result, And before determining the protection period of the content to be distributed in each edge cache server to be distributed in the first CDN, receiving a confirmation message sent by each edge cache server to be distributed.

Another embodiment of the present invention provides a content server, including an acquiring unit and a sending unit.

Specifically, the functions realized by each unit module provided by the embodiment of the present invention are as follows:

The acquiring unit is configured to acquire operational statistical data, where the operational statistical data is statistical data of visits to the content to be distributed in the second content delivery network CDN.

A sending unit, configured to send a content distribution message to the first central node, where the content distribution message includes the content identifier of the content to be distributed, storage location information of the content to be distributed in the content server, and the operation statistics data , the content distribution message is used to instruct the first central node to distribute the content to be distributed in a first CDN, and the first central node belongs to the first CDN.

For the technical effects of the content server provided by the embodiments of the present invention, reference may be made to the technical effects of the content server described in the method for distributing content performed by the content server in the above embodiments, which will not be repeated here.

Further, the sending unit is specifically configured to send an operation statistics request message to a second central node if the identifier of the second CDN is obtained in the local content deployment operation management table, and the second central node belongs to the For the second CDN, the local content deployment operation management table includes a mapping relationship between the identifier of the second CDN and the content identifier of the content to be distributed, the operation statistics request message includes the content identifier of the content to be distributed, the The operation statistics request message is used to request the second central node to statistically analyze the traffic information of the content to be distributed in the second CDN.

Further, the content server also includes a receiving unit,

The receiving unit is configured to receive an operation statistics response message sent by the second central node, where the operation statistics response message includes the operation statistics data.

Further, the operation statistics request message further includes statistical parameters, and the operation statistics message is used to request the second central node to statistically analyze the traffic information of the content to be distributed in the second CDN according to the statistical parameters, The statistical parameters include at least one of regional granularity information, code rate, time stamp information, and traffic statistics period.

An embodiment of the present invention also provides a content distribution system, including the central node described in any of the above, the content server described in any of the above, and at least one edge node managed by the central node, each edge node It consists of at least one edge cache server, the content server is connected to the central node through a network, and the central node is connected to each edge cache server through a network.

Specifically, the central node is the first central node.

The technical effect of the content distribution system provided by the embodiment of the present invention can be referred to the technical effect of the first central node described in the content distribution method executed by the first central node in the above embodiment and the content distribution method executed by the content server in the above embodiment The technical effect of the described content server will not be repeated here.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present invention.

Fig. 1 is a network structure diagram of a content distribution system;

FIG. 2 is a schematic flow chart of an existing content distribution method;

FIG. 3 is a first schematic flow diagram of a content distribution method provided by an embodiment of the present invention;

FIG. 4 is a second schematic flow diagram of the content distribution method provided in the embodiment of the present invention;

FIG. 5 is a third schematic flow diagram of the content distribution method provided in the embodiment of the present invention;

FIG. 6 is a fourth schematic flowchart of a content distribution method provided in an embodiment of the present invention;

FIG. 7 is a first structural schematic diagram of a central node provided in an embodiment of the present invention;

FIG. 8 is a second structural schematic diagram of a central node provided in an embodiment of the present invention;

FIG. 9 is a schematic diagram of the third structure of the central node provided in the embodiment of the present invention;

FIG. 10 is a first structural diagram of a content server provided in an embodiment of the present invention;

FIG. 11 is a second schematic diagram of the structure of the content server provided in the embodiment of the present invention;

FIG. 12 is a third structural schematic diagram of the content server provided in the embodiment of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

The terms "first", "second", "third" and "fourth" in the description and claims of the present invention and the above drawings are used to distinguish different objects, rather than to limit a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or apparatuses.

In the following description, for purposes of illustration rather than limitation, specific details such as specific system architectures, interfaces, and techniques are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

In addition, the term "and/or" in this article is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and/or B, which may mean: A exists alone, A and B exist at the same time, There are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

Fig. 1 is a network structure diagram of a content distribution system. Referring to FIG. 1 , the content distribution system includes a content server 10 and one or more CDNs 11 . Among them, the CDN 11 and the content server 10 are connected through a network.

Optionally, the content server 10 may be a content provider (CP, Content Provider) server, or a service provider (SP, Service Provider) server.

The CDN 11 includes a central node 110 and one or more edge nodes 111 connected to the central node 110 . Wherein, the central node 110 and the edge node 111 are connected through a network. Each edge node includes one or more edge cache servers 112 .

The central node 110 has the functions of managing content, scheduling content, caching content and distributing content, etc., and can know the geographic location information of all edge nodes 111, the storage information and service status of all edge cache servers 112, and other information.

The content server 10 is mainly used to send a content distribution message to the central node 110 in the CDN 11, and is used to instruct the central node 110 to distribute the content to be distributed in the CDN 11 to which the central node 110 belongs according to the content identification of the content to be distributed in the content distribution message. distribution.

Wherein, the content server 10 itself maintains a content deployment operation management table, which includes parameters such as content ID, CDN ID, online time, and offline time, wherein the CDN ID is used to indicate that the distribution is related to the content ID. The CDN of the corresponding content.

The central node 110 is mainly used to receive the content distribution message sent by the content server 10, and download the content to be distributed according to the storage location information in the received content distribution message. The central node 110 is also used to determine which edge cache servers 112 to distribute the acquired content to be distributed to, and to analyze the access of the content indicated by the content ID in the CDN 11 according to the content ID included in the operation statistics request sent by the content server 10 amount of information.

There is a content protection period for the content distributed in the CDN. Wherein, the content protection period is a time period during which the CDN enforces protection for newly deployed content on the system so that it will not be eliminated.

In the prior art, there are the following two content distribution methods in CDN:

(1) After the central node obtains the content to be distributed from the CP server/SP server, it triggers one of the cache servers in each edge node in the network to download a copy of the content to be distributed, so that all edge nodes in the network store a copy content to be distributed.

(2) After the central node obtains the content to be distributed from the CP server/SP server, the central node, according to the target distribution location information contained in the content distribution task message sent by the CP server/SP server, The cache server included in the node determines the cache server to be distributed, and triggers the cache server to be distributed to download a copy of the content to be distributed, so as to store a copy of the content to be distributed in the cache server to be distributed.

Specifically, as shown in Figure 2, the above-mentioned second content distribution method is specifically:

1. The content server sends a content distribution message to the central node included in the CDN, wherein the content distribution message includes the content identifier of the content to be distributed, the storage location information of the content to be distributed in the content server, and the destination distribution location information.

2. According to the target distribution location information, the central node selects the edge cache server with the lowest storage space utilization rate and the best service status among the edge nodes corresponding to the target distribution location information as the cache server to be distributed.

3. The central node triggers all cache servers to be distributed to download the content to be distributed.

4. Each cache server to be distributed sends a confirmation message to the central node after downloading the content to be distributed.

5. The central node sends a setting message including a preset content protection period to each cache server to be distributed, so that each cache server to be distributed sets a preset content protection period for the downloaded content.

The above-mentioned CDN content distribution methods can realize the distribution of the content to be distributed to the "edge" of the network, but for each edge cache server that obtains the content to be distributed, the content to be distributed stored by the edge cache server may not meet the needs of users. Access requirements, which in turn lead to overloading of edge cache server access.

Specifically, the number of visits to content has the following characteristics in different dimensions:

1. There are differences in the number of visits to content in different regions.

Due to the cultural differences of users in different regions and other reasons, the number of visits to different content in different regions is different. For example, the statistical data of a certain video application is: the top three regions with the highest visit volume of movie X are A, B and C respectively, and the top three regions with the highest visit volume of movie Y are L, M respectively. land and N land.

In order to provide users with the nearest service as much as possible, when distributing content, priority should be given to distributing content to areas with high traffic volume, that is, areas with high user demand, and generally the greater the traffic volume, the more content should be distributed to deal The pressure of concurrent access.

2. There are differences in the number of visits to content over time.

After the content goes online, its traffic generally follows the process of rising first and then falling. This time period from rising to falling is called the content traffic decay cycle. Different content has different visit volume decay periods. Some content sees a rapid increase in visits and then falls rapidly after it goes online; very slowly.

When distributing content, it is ideal to set different protection periods according to the decay period of the content's visits, which can prevent the content from being eliminated when the visits are increasing but the protection period has passed, and prevent the visits from being eliminated. A situation where content that has become very low but is still under protection still takes up cache space.

3. There are differences in the number of visits to content at different bit rates and different time stamps

Due to the complexity of the network environment, there are generally multiple bit rates for streaming media content, and the smoothness of streaming media content transmission is ensured by switching bit rates during transmission.

In addition, the current Hypertext Transfer Protocol (HTTP, Hypertext Transfer Protocol) generally requires streaming media content to be cut into many short-time (for example, 10 seconds, one minute, etc.) content fragments, and each content fragment can have A timestamp used to indicate the start time of the content segment relative to the streaming media content.

From the point of view of the code rate, the number of user visits to each code rate is not uniform, and there are hot and cold code rates. From the perspective of time stamps, users’ access to content on each time stamp is also uneven. Users do not always see the content from the beginning to the end. Some content may only be viewed at the beginning, and some may be watched part of the beginning or end.

When distributing streaming media content, priority should be given to distributing content fragments with a high bit rate and time periods with high traffic to edge nodes for storage.

Aiming at the problems existing in the content distribution method in the prior art, the embodiment of the present invention provides a content distribution method, device and system based on the characteristics of content visits in different dimensions, by adding the content to be distributed in the content distribution message in the second The traffic information of different dimensions in the CDN, that is, to increase the operation statistics of the content to be distributed in different dimensions in the second CDN, so that when the content to be distributed is distributed in the first CDN, the edge cache server to be distributed can be accurately calculated. The content stored in each edge cache server is to be distributed, so as to avoid the problem of overloading access to the edge cache server and better meet the access needs of users.

Embodiment one

FIG. 3 is a schematic flowchart of a content distribution method provided by an embodiment of the present invention. The content distribution method can be applied in the application scenario shown in FIG. 1 .

Referring to Figure 3, the content distribution method includes:

S100. The content server obtains operation statistics data.

Wherein, the operational statistical data is the statistical data of the visit volume of the content to be distributed in the second CDN.

S101. The content server sends a content distribution message including a content identifier of the content to be distributed, storage location information of the content to be distributed on the content server, and operation statistics data to the first central node.

Wherein, the content distribution message is used to instruct the first central node to distribute the content to be distributed in the first CDN, and the first central node belongs to the first CDN.

S102. The first central node downloads the content to be distributed according to the content identifier and storage location information.

The first central node downloads the content to be distributed from the content server, and this process is the same as that of the existing central node downloading the content to be distributed from the content server, and will not be described in detail here.

S103. The first central node obtains at least one determined edge cache server to be distributed and the content to be distributed to each edge cache server to be distributed according to the operation statistics data and the state information of all edge nodes in the first CDN.

S104. The first central node distributes, for each edge cache server to be distributed, the content to be distributed to the edge cache server to be distributed.

In general, the content server itself maintains a content deployment operation management table, which contains parameters such as content ID, CDN ID, online time, and offline time, among which, the CDN ID is used to indicate that the distribution is related to the content Identifies the CDN of the corresponding content.

The content server executes S100 to obtain operational statistical data.

Specifically, in response to the administrator's content distribution operation, the content server queries whether the local content deployment operation management table contains the content identifier of the content to be distributed. The administrator's content distribution operation is used to trigger the content server to send a content distribution message to the first A first central node in a CDN, so that the first central node distributes the content to be distributed in the first CDN.

If the content identifier of the content to be distributed exists in the content deployment operation management table, the content server obtains the CDN identifier corresponding to the content identifier of the content to be distributed, that is, acquires the second CDN identifier.

If the content identifier of the content to be distributed does not exist in the content deployment operation management table, the content server performs corresponding steps according to the existing content distribution method.

Wherein, the local content deployment operation management table includes a mapping relationship between the identifier of the second CDN and the content identifier of the content to be distributed.

It can be understood that since the content distribution operation is used to trigger distribution of the content to be distributed in the first CDN, it means that the content to be distributed has never been distributed in the first CDN. The content deployment operation management table in the content server records which content is distributed in which CDN. Therefore, if the content identification of the content to be distributed exists in the content deployment operation management table, it means that the content to be distributed has been distributed in other CDNs , and the CDN is different from the first CDN.

Specifically, the content server sends an operation statistics request message including the content identifier of the content to be distributed to the second central node, for requesting the second central node to statistically analyze the traffic information of the content to be distributed in the second CDN. Wherein, the second central node belongs to the second CDN.

Further, the operation statistics request message also includes statistical parameters, and the operation statistics request message is used to request the second central node to statistically analyze the traffic information of the content to be distributed in the second CDN according to the statistical parameters.

Preferably, the statistical parameters in the embodiment of the present invention include at least one of regional granularity information, code rate, time stamp information, and traffic statistics period.

Wherein, the regional granularity information refers to the regional granularity of regional information statistics, for example, "province" or "city" as a unit. The bit rate refers to the bit rate of the content. The time stamp information refers to the time granularity when counting the access metric distribution of the streaming media content on the time stamp, for example, the access count is counted in units of 10 minutes. The traffic statistics period refers to a time period for counting traffic, for example, 24 hours.

Wherein, the central node in the embodiment of the present invention is pre-configured with statistical default parameters, and the central node may be the first central node or the second central node.

Specifically, if the statistical parameter is not included in the operation statistics request message, the second central node statistically analyzes the traffic information of the content to be distributed in the second CDN according to the statistical default parameter.

Since the content to be distributed has been distributed in the second CDN, the second central node can calculate the traffic information of each dimension of the content to be distributed in the second CDN, that is, the second central node can calculate operational statistics. The second central node sends the calculated operational statistical data to the content server, so that the content server can obtain the operational statistical data.

If the statistical parameter is included in the statistical request message, corresponding to the statistical parameter, the operation statistical data includes the traffic information of each reference location information for distributing the content to be distributed in the second CDN, the traffic traffic of the content to be distributed in at least one code rate information, the visit volume information of all content segments of the content to be distributed in each code rate, and the visit volume information of the content to be distributed in each statistical period.

Correspondingly, after the content server obtains the operation statistics data, it executes S101, and sends a content distribution message including the content identification of the content to be distributed, the storage location information of the content to be distributed on the content server, and the operation statistics data to the first central node.

Optionally, the content distribution message may also include target distribution location information and/or a preset content protection period.

After receiving the content distribution message, the first central node downloads the content to be distributed according to the content identifier and storage location information, that is, executes S102.

The process of downloading the content to be distributed by the first central node is the same as the process of downloading the content to be distributed by the existing central node from the content server, and will not be described in detail here.

After the first central node obtains the content to be distributed and the operation statistics data, according to the operation statistics data and the state information of all the edge nodes in the first CDN, obtain at least one edge cache server to be distributed and the Content distributed by the edge cache server, that is, execute S103.

Wherein, the state information in the embodiment of the present invention includes the location information of each edge node in the first CDN, the storage space utilization rate of each edge cache server, the attribute value of each edge cache server, and the Storage space value. The attribute value of the edge cache server is used to indicate whether the operation of the edge cache server is normal, and the attribute value may be a central processing unit (CPU, Central Processing Unit) occupancy rate of the edge cache server.

Specifically, if the operation statistics data includes at least one reference location information and the access volume information of each reference location information of the content to be distributed, the first central node will Status information, the process of determining at least one edge cache server to be distributed is:

1. The first central node determines at least one target reference location information from the location information of all reference edge nodes according to the preset rules and the access volume information of each reference location information of the content to be distributed.

Among them, the preset rule can be to select the reference location information whose visit volume is greater than the visit volume threshold, or to select the previous reference location information according to the order of the visit volume information from large to small, and this embodiment of the present invention does not make specific limited.

2. The first central node selects the location information of an edge node to be distributed for each destination reference location information from the location information of all edge nodes.

Wherein, the edge node to be distributed includes at least one edge cache server.

The purpose reference location information is determined by the first central node according to the operational statistical data, which can be used as a reference for distributing content to be distributed in the first CDN. Therefore, the first central node needs to use the location information of all edge nodes in the first CDN , for each purpose, refer to the location information to determine the location information of an edge node to be distributed.

Further, if the content distribution message also includes destination distribution location information, it means that the first central node must distribute the content to be distributed to the destination distribution edge node included in the destination distribution location information. If the location information of the target distribution edge node is not included in the location information of at least one to-be-distributed edge node, the first central node determines the location information of the target distribution edge node as the location information of the to-be-distributed edge node.

3. The first central node determines at least one edge cache server to be distributed for each edge node to be distributed according to the location information of each edge node to be distributed.

Specifically, for the location information of each edge node to be distributed among the location information of at least one edge node to be distributed, the condition on which the first central node selects the edge cache server to be distributed is: the storage space utilization rate of the edge cache server is less than or equal to the second preset threshold, the attribute value of the edge cache server is less than the third preset threshold, and the number of edge cache servers to be distributed is less than or equal to the number of content copies.

Wherein, storing one piece of content in the edge cache server is called a copy, and the edge cache server stores multiple pieces of content, which can cope with the pressure of concurrent access.

For the location information of the first edge node to be distributed in the location information of at least one edge node to be distributed, the first central node determines at least one edge node to be distributed for the first edge node to be distributed according to the location information of the first edge node to be distributed The process of distributing edge cache servers is:

A. The first central node determines the number N of content to be distributed for the first edge node to be distributed according to the access information of the content to be distributed at the first edge node to be distributed and the first preset threshold, where N≥1.

Preferably, the first preset threshold is a traffic threshold, where the traffic threshold can be set according to experience, which is not specifically limited in this embodiment of the present invention. For example, the average visit volume information of all edge nodes in the first CDN is used as the visit volume threshold.

B. The first central node selects X edge cache servers as candidate edge cache servers from all the edge cache servers included in the first edge node to be distributed according to preset conditions, wherein the preset condition is the storage space of the edge cache servers The utilization rate is less than or equal to the second preset threshold, and the attribute value of the edge cache server is less than the third preset threshold, X≥1.

C. If N≥X, the first central node determines X candidate edge cache servers as edge cache servers to be distributed.

It can be understood that if N copies of the content to be distributed need to be distributed to the first edge node, and the first central node selects X candidate edge cache servers from all the edge cache servers included in the first edge node, and N≥X, Then all selected candidate edge cache servers need to be used as edge cache servers to be distributed.

D. If N<X, the first central node selects N candidate edge cache servers from the X candidate edge cache servers, and determines the N candidate edge cache servers as edge cache servers to be distributed, and the N candidate edge cache servers The server is the top N of the X candidate edge cache servers arranged in descending order according to the available storage space.

It can be understood that if the number of candidate edge cache servers selected by the first central node is greater than the number of content copies, it needs to be selected again from the candidate edge cache servers in order to finally determine the edge cache servers to be distributed.

Specifically, if the operation statistical data does not include at least one reference location information and the access volume information of the content to be distributed at each reference location information, the method for the first central node to determine the edge cache server to be distributed is the same as that in the prior art The method for the first central node to determine the edge cache server to be distributed is the same, and will not be described in detail here.

Further, after the first node determines at least one edge cache server to be distributed, determine the content to be distributed for each edge cache server to be distributed.

Specifically, if the operational statistical data includes traffic information of the content to be distributed at least one code rate and traffic information of all content fragments of the content to be distributed at each code rate, then for at least one edge cache server to be distributed For the first edge cache server to be distributed, the method for the first central node to determine the content to be distributed by the first edge cache server to be distributed is:

A. The first central node determines the value of the available storage space of the first edge cache server to be distributed.

The first central node manages all edge nodes and all edge cache servers in the first CDN, therefore, the first central node can know in advance the value of the available storage space of the first edge cache server to be distributed.

B. If the value of the available storage space of the first edge cache server to be distributed is less than the value of the occupied space of the content to be distributed, the first central node is based on the access information of the content to be distributed in at least one code rate and the content to be distributed in each code rate According to the traffic information of all content fragments with high rate, at least one content fragment is determined as the content that needs to be distributed by the first edge cache server to be distributed, wherein the occupied space value of at least one content fragment is equal to that of the first edge cache server to be distributed The number of available storage spaces.

It can be understood that if the available storage space of the first edge cache server to be distributed is smaller than the occupied space of the content to be distributed, it means that the first edge cache server to be distributed can only store part of the content to be distributed. Therefore, the first central node allocates the content fragment with the highest traffic information to the first edge cache server to be distributed according to the traffic information of each content fragment in the content to be distributed.

Specifically, the first central node first determines the code rate with the largest number of visits information according to the number of visits at least one code rate of the content to be distributed, and then, the first central node selects the content with the largest number of visits at the same code rate Fragmentation, the first central node selects each content fragment one by one in this order until the value of the occupied space of the selected content fragment is the same as the value of the available storage space of the first edge cache server to be distributed, that is, until the value of the first edge cache server to be distributed The available storage space value of the edge cache server is zero.

C. If the available storage space value of the first edge cache server to be distributed is greater than or equal to the occupied space value of the content to be distributed, then the first central node determines the content to be distributed as content that needs to be distributed by the first edge cache server to be distributed.

It can be understood that if the available storage space value of the first edge cache server to be distributed is greater than or equal to the occupied space value of the content to be distributed, it means that the first edge cache server to be distributed can store all the content to be distributed. Therefore, the first center The node determines that the content to be distributed is the content that needs to be distributed by the first edge cache server to be distributed.

After the first central node determines at least one edge cache server to be distributed and the content to be distributed for each edge cache server to be distributed, S104 is executed, and the first central node distributes the content to be distributed to each edge cache server to be distributed. The content distributed by the edge cache server to be distributed.

An embodiment of the present invention provides a content distribution method, adding operation statistics data to the content distribution message, the operation statistics data is the statistics data of the visit volume of the content to be distributed in the second CDN, and the operation statistics data can truly reflect the content to be distributed The traffic information of different dimensions in the second CDN enables the first central node to refer to the operation statistics data to determine at least one edge cache server to be distributed in the first CDN and the information to be distributed to each edge cache server to be distributed Content distribution The content to be distributed can also truly and accurately reflect the traffic information of the content to be distributed in the first CDN. In this way, not only the storage space utilization rate of each edge cache server to be distributed is improved, but also the access needs of users can be met, and the solution The problem of the edge cache server access overload in the prior art is solved.

Embodiment two

FIG. 4 is a schematic flowchart of a content distribution method provided by an embodiment of the present invention. The content distribution method can be applied in the application scenario shown in FIG. 1 .

Referring to Figure 4, the content distribution method includes:

S200. In response to the content distribution operation of the administrator, the content server queries whether the local content deployment operation management table contains the content identifier of the content to be distributed.

Specifically, the content server can acquire the content identifier of the content to be distributed, the storage location information of the content to be distributed in the content server, and/or the target distribution location information, and/or the preset content protection period according to the content distribution operation.

Wherein, the content identifier may be a content identity (ID, Identity) or a content name, which is not specifically limited in this embodiment of the present invention.

Exemplarily, the content server obtains according to the content distribution operation that the content ID of the content to be distributed is 0110jmvod02, and the destination distribution location information is "Beijing"; the preset content protection period is 24 hours.

In general, the content server itself maintains a content deployment operation management table, which contains parameters such as content ID, CDN ID, online time, and offline time, among which, the CDN ID is used to indicate that the distribution is related to the content Identifies the CDN of the corresponding content.

Specifically, after the content server obtains the content identifier of the content to be distributed according to the content distribution operation, it queries whether the local content deployment operation management table contains the content identifier of the content to be distributed.

If the content deployment operation management table contains the content ID of the content to be distributed, and the CDN ID corresponding to the content ID of the content to be distributed is the second CDN ID, the content server can obtain the content to be distributed in the second CDN according to the second CDN. Statistics on the number of visits to the content.

If the content deployment operation management table does not contain the content identifier of the content to be distributed, the content server performs corresponding processing according to the existing content distribution method.

S201. If the content identifier of the content to be distributed exists in the content deployment operation management table, the content server acquires a second CDN identifier corresponding to the content identifier of the content to be distributed.

S202. The content server sends an operation statistics request message including the content identifier of the content to be distributed to the second central node.

Wherein, the second central node belongs to the second CDN. The operation statistics request message is used to request the second central node to statistically analyze the traffic information of the content to be distributed in the second CDN.

Further, the operation statistics request message also includes statistical parameters, and the operation statistics request message is used to request the second central node to statistically analyze the traffic information of the content to be distributed in the second CDN according to the statistical parameters.

Preferably, the statistical parameters in the embodiment of the present invention include at least one of regional granularity information, code rate, time stamp information, and traffic statistics period.

Exemplarily, the statistics request message sent by the content server includes: the content ID is 0110jmvod02, the region granularity information is city, the code rate is 3 megabytes (MB, Megabytes) and 1MB, the time stamp is 20 minutes, and the statistics period is 24 hours .

S203. The second central node sends an operation statistics response message including operation statistics data to the content server.

Since the content to be distributed has been distributed in the second CDN, the second central node can calculate the traffic information of each dimension of the content to be distributed in the second CDN, that is, the second central node can calculate operational statistics. The second central node sends an operation statistics response message including operation statistics data to the content server.

Wherein, the central node in the embodiment of the present invention is pre-configured with statistical default parameters, and the central node may be the first central node or the second central node.

Specifically, if the statistical parameter is not included in the operation statistics request message, the second central node statistically analyzes the traffic information of the content to be distributed in the second CDN according to the statistical default parameter. Correspondingly, the operation statistics data in the operation statistics response message sent by the second central node to the content server corresponds to the statistics default parameters.

If the operation statistics request message contains statistics parameters, the operation statistics data in the operation statistics response message is configured according to the statistics parameters in the operation statistics request message.

Preferably, the operation statistical data includes the visit volume information of the content to be distributed at each reference location information, the visit volume information of the content to be distributed at least one code rate, and the visit volume of all content fragments of the content to be distributed at each code rate At least one of the information and the traffic information of the content to be distributed in each statistical period.

Exemplarily, the operation statistics response message sent by the second central node to the content server includes the following content:

According to the above operation statistics response message, the content server obtains the visit volume information of the content with the content identifier 0110jmvod02 in Jiangsu Suzhou and Tianjin, the visit volume information of the content in Jiangsu Suzhou and Tianjin in the first five statistical periods, and the three content classifications of the content. Information about the number of visits of movies in Suzhou and Tianjin, Jiangsu, and information about the number of visits of content with different bit rates in Suzhou and Tianjin, Jiangsu.

S204. The content server sends a content distribution message including a content identifier of the content to be distributed, storage location information of the content to be distributed on the content server, and operation statistics data to the first central node.

S205. The first central node downloads the content to be distributed according to the content identifier and storage location information.

S204-S205 in this embodiment of the present invention are the same as S101-S102 in Embodiment 1, and will not be described in detail here.

S206. The first central node obtains at least one determined edge cache server to be distributed and the content to be distributed to each edge cache server to be distributed according to the operation statistics data and the state information of all edge nodes in the first CDN.

Specifically, the first central node determines the edge nodes to be distributed from all the edge nodes of the first CDN according to the operation statistics data, and then determines at least one edge cache server to be distributed from each edge node to be distributed, and provides each The distribution edge cache server determines the content to be distributed by the edge cache server to be distributed.

For the specific process of the first central node determining at least one edge cache server to be distributed and the content to be distributed to each edge cache server to be distributed, please refer to the subsequent description.

S207. The first central node triggers each edge cache server to be distributed to download the content to be distributed to itself.

S208. Each edge cache server to be distributed sends a confirmation message to the first central node after downloading the content to be distributed for itself.

Each edge cache server to be distributed sends a confirmation message to the first central node after downloading the content to be distributed for itself, so that the first central node can determine that the content to be distributed is successfully distributed.

S209. The first central node determines the protection period of each edge cache server of the content to be distributed in the first CDN.

The content distributed in the CDN has a content protection period, which is a time period for mandatory protection of the content so that it will not be eliminated.

Specifically, if the operation statistical data includes at least one statistical period and the visit volume information of the content to be distributed in each statistical period, the first central node determines that the content to be distributed is in the first statistical period according to the visit volume information of the content to be distributed in each statistical period. The protection period of each edge cache server to be distributed in the CDN.

Optionally, the first central node may select a statistical period before the first decrease in the number of visits as the content protection period.

Illustratively, in the above example, the first decline in the number of visits of the content with the content identifier 0110jmvod02 in each statistical cycle of "Jiangsu Suzhou" occurs on the fourth day, then the first central node sets the content as the content of "Jiangsu Suzhou" The protection period is (4-1)×24=72 hours. The content whose content ID is 0110jmvod02 in each statistical cycle of “Tianjin” has the first decline in the number of visits on the 3rd day, then the first central node sets the content protection period of the content in “Tianjin” as (3-1)×24= 48 hours.

Further, if the content distribution message includes a preset content protection period, the first central node modifies the content protection period of the content to be distributed determined by itself in each edge cache server to be distributed according to the preset content protection period.

Optionally, the first central node may select a longer content protection period as the final content protection period.

Exemplarily, if the preset content protection period is 24 hours, and the first central node selects a longer content protection period as the final content protection period, then the content whose content identifier is 0110jmvod02 is within the content protection period of "Jiangsu Suzhou" Finally, it is 72 hours, and the content protection period in "Tianjin" is finally 48 hours.

If the operation statistical data does not include at least one statistical period and the traffic information of the content to be distributed in each statistical period, the first central node determines that the protection period of each edge cache server to be distributed in the first CDN of the content to be distributed is preset set content protection period.

Exemplarily, in the above example, in the "Tianjin" region, the number of visits to the content whose content ID is 0110jmvod02 drops sharply on the third day. In this way, it can be avoided that the content still forcibly occupies the cache on the third day.

S210. The first central node sends to each edge cache server to be distributed a setting request including a protection period of the content to be distributed in the edge cache server to be distributed.

The setting request is used to instruct each edge cache server to be distributed to set the protection period of its own distributed content, wherein the distributed content belongs to the content to be distributed.

It can be seen that in the embodiment of the present invention, the first central node determines the content protection period according to the change of the actual visit volume of the content. In this way, the situation that the visit volume is increasing but the content that has passed the protection period can be prevented from being eliminated, It can also prevent the situation that the content that has become very low in visits but is still in the protection period still occupies the cache space.

The embodiment of the present invention provides a content distribution method, by adding the traffic information of the content to be distributed in different dimensions in the second CDN in the content distribution message, that is, adding the operation statistics data of the content to be distributed in different dimensions in the second CDN, When distributing the content to be distributed in the first CDN, the edge cache server to be distributed and the content stored in each edge cache server to be distributed can be accurately calculated, thereby avoiding the problem of overloading the edge cache server and better satisfying users access requirements.

In the embodiment of the present invention, when the first central node executes S206, if the operation statistical data includes at least one reference location information and the visit volume information of the content to be distributed at each reference location information, then the first central node according to the operation statistics data and State information of all edge nodes in the first CDN determines at least one edge cache server to be distributed.

Specifically, as shown in Figure 5, the method for the first central node to determine at least one edge cache server to be distributed is:

S206a. The first central node determines at least one target reference location information from all the reference location information according to the preset rules and the visit volume information of each reference location information of the content to be distributed.

Among them, the preset rule can be to select the reference location information whose visit volume is greater than the visit volume threshold, or to select the previous reference location information according to the order of the visit volume information from large to small, and this embodiment of the present invention does not make specific limited.

Exemplarily, if the visit volume threshold is 3,000,000, in the above example, the first central node determines "Jiangsu Suzhou" and "Tianjin" as the destination reference location information.

S206b. For the first destination reference location information in the at least one destination reference location information, the first central node judges whether there is any edge node in all edge nodes of the first CDN whose location information is the same as the first destination reference location information.

Wherein, the first target reference position information is any one of at least one target reference position information.

Since the destination reference location information is selected by the first central node according to the operational statistical data, and the first central node intends to distribute the content to be distributed in the first CDN, the first central node needs to determine whether the There is an edge node having the same information as the destination reference position.

S206c. If it exists, the first central node determines the location information of the edge node that is the same as the first destination reference location information as the location information of the first edge node to be distributed.

S206d. If it does not exist, the first central node selects the edge node with the smallest distance to the first destination reference location information from the location information of all edge nodes as the first edge node to be distributed.

Exemplarily, the location information of the edge nodes in the first CDN is: "Tianjin", "Beijing" and "Jiangsu Nanjing", and the destination reference location information determined by the first central node is: "Tianjin" and "Jiangsu Suzhou". The edge node location information of the first CDN contains "Tianjin", therefore, the first central node determines "Tianjin" as the edge node location information to be distributed. "Jiangsu Suzhou" cannot be found in the edge node location information of the first CDN, so the first central node determines "Jiangsu Nanjing" closest to "Jiangsu Suzhou" as the edge node location information to be distributed.

S206e. If the content distribution message also includes destination distribution location information, the first central node judges whether the location information of the destination distribution edge node is included in the location information of the edge node to be distributed determined in the previous step.

Wherein, the destination distribution edge node is included in the destination distribution location information.

S206f, if the location information of the destination distribution edge node is not included in the location information of the edge node to be distributed determined in the previous step, the first central node determines the location information of the destination distribution edge node as the location information of the edge node to be distributed .

S206g. If the location information of the edge node to be distributed is included in the location information of the edge node to be distributed determined in the previous step, the location information of the edge node to be distributed determined in the previous step is the final location of the edge node to be distributed information.

It can be understood that if the content distribution message includes the destination distribution location information, it means that the first central node must distribute the content to be distributed to all destination distribution edge nodes included in the destination distribution location information. If the edge nodes to be distributed determined by the first central node with reference to the operation statistics data do not include the target distribution edge node, the first central node needs to also determine the location information of the target distribution edge node as the location information of the to-be-distributed edge node.

Exemplarily, the content distribution message contains destination distribution location information, the destination distribution location information is "Beijing", and the location information of edge nodes to be distributed determined by the first central node in the above steps are "Jiangsu Nanjing" and "Tianjin ", does not include "Beijing", therefore, the first central node also determines "Beijing" as the location information of the edge node to be distributed.

S206h. For the location information of the first edge node to be distributed among the location information of at least one edge node to be distributed, the first central node determines the number N of contents to be distributed to be distributed to the first edge node to be distributed, where N≥1.

Wherein, the first edge node to be distributed is any one of at least one edge node to be distributed, and the first preset threshold may be a traffic threshold.

Each edge node to be distributed can store at least one piece of content to be distributed. After determining the edge node to be distributed, the first central node determines the quantity N of content to be distributed for each edge node to be distributed.

Optionally, the first central node determines N according to the access volume information of the content to be distributed on the first edge node to be distributed and the first preset threshold.

It should be noted that if the location information of the first central node is for the purpose of distributing location information, and the first central node does not belong to the second CDN, the first central node uses the existing content distribution method to determine that it needs to be the first central node The node distributes the amount of content to be distributed.

Exemplarily, if the access threshold is 3,000,000, the first central node determines that the number of content to be distributed for “Tianjin” is 3,000,000/3,000,000=1, and the number of content to be distributed for “Jiangsu Nanjing” refers to “Jiangsu Suzhou" 10000000/3000000 = 3.

Wherein, the quantity of content to be distributed is also referred to as the number of copies.

S206i. The first central node selects X edge cache servers as candidate edge cache servers from all edge cache servers included in the first edge node to be distributed according to preset conditions.

Wherein, the preset condition is that the storage space utilization rate of the edge cache server is less than or equal to the second preset threshold, and the attribute value of the edge cache server is less than the third preset threshold, X≥1.

S206j. If N≥X, the first central node determines X candidate edge cache servers as edge cache servers to be distributed.

S206k. If N<X, the first central node selects N candidate edge cache servers from the X candidate edge cache servers, and determines the N candidate edge cache servers as edge cache servers to be distributed, and the N candidate edge cache servers The server is the top N of the X candidate edge cache servers arranged in descending order according to the available storage space.

Exemplarily, if "Jiangsu Nanjing" and "Tianjin" respectively have 2 and 5 candidate edge cache servers left, the number of copies of "Jiangsu Nanjing" and "Tianjin" are 3 and 1 respectively. The number 2 of candidate edge cache servers of "Jiangsu Nanjing" is less than the number 3 of replicas of "Jiangsu Nanjing". Therefore, the first central node directly uses the two candidate edge cache servers of "Jiangsu Nanjing" as edge cache servers to be distributed. The number 5 of candidate edge cache servers in "Tianjin" is greater than the number 1 of replicas in "Tianjin". Therefore, the first central node selects 1 edge cache server with the lowest storage space utilization from the 5 candidate edge cache servers in "Tianjin". As the edge cache server to be distributed. For "Beijing", since the first central node cannot know the traffic information of the content to be distributed in "Beijing", the first central node can select the edge cache with the lowest storage utilization and the best service status according to the existing content distribution method The server serves as the edge cache server to be distributed.

Further, in the embodiment of the present invention, when the first central node executes S206, if the operation statistics data includes the operation statistics data including the traffic information of the content to be distributed at least one code rate and the total number of visits of the content to be distributed at each code rate For the access volume information of the content fragments, the first central node determines the content to be distributed by each edge cache server to be distributed according to the operation statistics and the available storage space value of each edge cache server in the first CDN.

Specifically, as shown in FIG. 6, for the first edge cache server to be distributed among the at least one edge cache server to be distributed, the first edge cache server to be distributed is any one of the at least one edge cache server to be distributed, and the first center The method for a node to determine the content to be distributed by the first edge cache server to be distributed is as follows:

S206w. The first central node determines the value of the available storage space of the first edge cache server to be distributed.

Specifically, available storage space of the first edge cache server to be distributed=total storage space of the first edge cache server to be distributed×space utilization threshold-current used storage space of the first edge cache server to be distributed.

S206x. The first central node judges whether the value of the available storage space of the first edge cache server to be distributed is greater than the value of the occupied space of the content to be distributed.

S206y. If the available storage space value of the first edge cache server to be distributed is greater than or equal to the occupied space value of the content to be distributed, the first central node determines the content to be distributed as content to be distributed by the first edge cache server to be distributed.

S206z. If the value of the available storage space of the first edge cache server to be distributed is smaller than the value of the occupied space of the content to be distributed, the first central node selects the code rate with the largest number of visits information, and selects one of the code rates in the same code rate The content segment with the largest access information is determined as the content to be distributed by the first edge cache server to be distributed until the available storage space value of the first edge cache server to be distributed is zero.

Exemplarily, if the available storage space of the two edge cache servers to be distributed in "Nanjing, Jiangsu" in the above example is 2GB and 1GB respectively (wherein, 1GB=1024MB), the available storage space of the edge cache server to be distributed in "Tianjin" is 10GB, and the occupied space of the content to be distributed is 1.75GB, then the first central node directly determines the complete content to be distributed as the content to be distributed by the edge cache server to be distributed in "Tianjin", and determines the complete content to be distributed as The content that needs to be distributed to the edge cache server to be distributed with an available storage space of 2GB in "Jiangsu Nanjing".

For the edge cache server to be distributed with an available storage space of 1GB in "Jiangsu Nanjing", since the access volume of the content with the content identifier 0110jmvod02 at a code rate of 3MB is significantly higher than that of 1MB, the first central node preferably selects a code rate 3MB of content. Under the same code rate, the traffic information of each content fragment from high to low is the end 20 minutes, the beginning 20 minutes, and the middle 20 minutes. Therefore, the order in which the first central node selects content fragments is when the code rate is 3MB 20 minutes at the end, 20 minutes at the beginning, and 20 minutes in the middle, and then 20 minutes at the end, 20 minutes at the beginning, and 20 minutes in the middle with a code rate of 1MB. According to this sequence, after the first central node selects content fragments with a code rate of 3MB for the last 20 minutes and the first 20 minutes, the edge cache server to be distributed with an available storage space of 1GB will no longer have available storage space, so , the first central node determines that the content to be distributed to the edge cache server with an available storage space of 1G in "Jiangsu Nanjing" is the content fragments of the end 20 minutes and the first 20 minutes with a code rate of 3MB.

For the edge cache server in "Beijing" to be distributed, the first central node performs corresponding processing according to the existing content distribution method.

To sum up, in the content distribution method provided by the embodiment of the present invention, the first central node determines which edge cache servers in the first CDN to distribute the content to be distributed in the second CDN according to the real traffic information in the second CDN, and determines the need for For the content distributed in each edge cache server to be distributed, the problem of overloading access to the edge cache server can be avoided, and the access requirements of users can be better met.

Embodiment three

An embodiment of the present invention provides a central node 1, the central node 1 is a first central node, and the central node 1 is configured to perform the steps performed by the first central node in the above method. The central node 1 may include modules corresponding to corresponding steps. As shown in Figure 7, the central node 1 includes:

The obtaining unit 20 is configured to obtain the content to be distributed in the first content distribution network CDN and operation statistics data in the second CDN, the operation statistics data being the content to be distributed in the second CDN Statistical data of visits, the central node belongs to the first CDN.

The determining unit 21 is configured to obtain a distribution result of the content to be distributed according to the operation statistical data obtained by the obtaining unit 20 and the state information of all edge nodes in the first CDN, the distribution result including the determined At least one edge cache server to be distributed and the content to be distributed for each edge cache server to be distributed.

The distribution unit 22 is configured to, according to the distribution result determined by the determination unit 21 , distribute to each edge cache server to be distributed the content that needs to be distributed to the edge cache server to be distributed among the content to be distributed.

Further, as shown in FIG. 8, the central node 1 further includes a receiving unit 23,

The receiving unit 23 is configured to receive a content distribution message sent by a content server, where the content distribution message includes a content identifier of the content to be distributed, storage location information of the content to be distributed in the content server, and the operation Statistical data.

Further, as shown in FIG. 8, the central node 1 further includes a download unit 24,

The downloading unit 24 is configured to download the content to be distributed according to the content identifier and the storage location information received by the receiving unit 23 .

Optionally, the operational statistical data includes at least one reference location information and access volume information of the content to be distributed at each reference location information, and the status information includes the location of each edge node in the first CDN information.

Further, the determining unit 21 is specifically configured to:

Determining at least one target reference location information from all the reference location information according to preset rules and the visit volume information of each reference location information of the content to be distributed;

Selecting the location information of an edge node to be distributed for each purpose reference location information from the location information of all the edge nodes, the edge node to be distributed includes at least one edge cache server;

According to the location information of each edge node to be distributed, at least one edge cache server to be distributed is determined for each edge node to be distributed.

Further, for the first target reference position information in the at least one target reference position information, the determining unit 21 is specifically configured to:

If the position information of the edge node among all the edge nodes is the same as the first destination reference position information, then determine the position information of the edge node as the position information of the first edge node to be distributed;

If the location information of all the edge nodes is different from the first destination reference location information, select the location information of the first edge node to be distributed from the location information of all the edge nodes, wherein the first The distance between the location information of an edge node to be distributed and the first destination reference location information is the smallest.

Further, the content distribution message also includes target distribution location information.

Correspondingly, the determining unit 21 is further configured to, after selecting a location information of an edge node to be distributed for each target reference location information from the location information of all edge nodes, and for each edge node to be distributed Before the location information of at least one edge cache server to be distributed is determined, if the location information of the destination distribution edge node is not included in the location information of at least one to-be-distributed edge node, then the location information of the destination distribution edge node is determined as the location information of the destination distribution edge node The location information of the distribution edge node, the destination distribution edge node is included in the parent distribution location information.

Further, the status information also includes the storage space utilization rate of each edge cache server in the first CDN, the attribute value of each edge cache server, and the storage space value of each edge cache server.

Correspondingly, for the location information of the first edge node to be distributed in the location information of the at least one edge node to be distributed, the determining unit 21 is specifically configured to:

According to the traffic information of the content to be distributed on the first edge node to be distributed and a first preset threshold, determine the number N of the content to be distributed that needs to be distributed to the first edge node to be distributed, N≥1 ;

Select X edge cache servers as candidate edge cache servers from all edge cache servers included in the first edge node to be distributed according to preset conditions, wherein the preset condition is the storage space utilization rate of the edge cache servers less than or equal to the second preset threshold, and the attribute value of the edge cache server is less than the third preset threshold, X≥1;

If N≥X, determine X candidate edge cache servers as edge cache servers to be distributed;

If N<X, select N candidate edge cache servers from the X candidate edge cache servers, and determine the N candidate edge cache servers as edge cache servers to be distributed, and the N candidate edge cache servers The servers are the first N of the X candidate edge cache servers arranged in descending order of available storage space.

Optionally, the operation statistical data includes information about the number of views of the content to be distributed at least one bit rate and information about the number of views of all content segments of the content to be distributed at each bit rate.

Correspondingly, for the first edge cache server to be distributed among at least one edge cache server to be distributed, the determining unit 21 is specifically configured to:

Determine the value of the available storage space of the first edge cache server to be distributed;

If the value of the available storage space of the first edge cache server to be distributed is smaller than the value of the occupied space of the content to be distributed, according to the access volume information of the content to be distributed at least one code rate and the content to be distributed every The traffic information of all content fragments of a code rate, determine that at least one content fragment is the content that needs to be distributed by the first edge cache server to be distributed, and the occupied space value of the at least one content fragment is equal to the value of the first edge cache server to be distributed. - The value of the available storage space of the edge cache server to be distributed;

If the value of the available storage space of the first edge cache server to be distributed is greater than or equal to the value of the occupied space of the content to be distributed, the content to be distributed is determined to be distributed by the first edge cache server to be distributed content.

Further, the determining unit 21 is specifically configured to:

Select the code rate with the largest number of visits;

According to the code rate with the largest number of visits and the number of visits information of all content fragments of the content to be distributed at this code rate, determine the content fragment with the largest number of visits information in the code rate as the first The content distributed by the edge cache server to be distributed until the value of the available storage space of the first edge cache server to be distributed is zero.

Further, the receiving unit 23 is also configured to distribute the content to be distributed to each edge cache server to be distributed in the determination unit 21 according to the distribution result. Afterwards, a confirmation message sent by each edge cache server to be distributed is received.

Optionally, the operational statistical data includes at least one statistical period and information on the number of visits of the content to be distributed in each statistical period.

Correspondingly, the determining unit 21 is further configured to, after the distributing unit distributes, for each edge cache server to be distributed, the content that needs to be distributed to the edge cache server to be distributed in the content to be distributed according to the distribution result , determining a protection period of each edge cache server of the content to be distributed in the first CDN according to the traffic information of the content to be distributed in each statistical period.

Further, as shown in FIG. 8, the central node 1 further includes a sending unit 25,

The sending unit 25 is configured to send a setting request to each edge cache server to be distributed, the setting message includes the protection period of the content to be distributed determined by the determination unit 21 in the edge cache server to be distributed, the The setting message is used to instruct each edge cache server to be distributed to set the protection period of its own distributed content, and the distributed content belongs to the content to be distributed.

It can be understood that the central node 1 in this embodiment is only a logical division based on the functions realized by the central node 1 , and in practical applications, the above units can be superimposed or split. In addition, the functions implemented by the central node 1 provided in this embodiment correspond one-to-one to the content distribution method provided in the above-mentioned embodiment. The more detailed processing flow implemented by the central node 1 has been described in detail in the above-mentioned method embodiment. description and will not be described in detail here.

Another embodiment of the present invention provides a central node. As shown in FIG. 9 , the central node includes an interface circuit 20 , a processor 21 , a memory 22 and a system bus 23 .

Wherein, the interface circuit 20 , the processor 21 and the memory 22 are connected through the system bus 23 and communicate with each other.

Those skilled in the art can understand that the structure of the central node shown in FIG. 9 is not limited to the central node, which may include more or less components than shown in the figure, or combine some components, or arrange different components.

Specifically, when the central node is running, the central node executes the content distribution method described in the above method embodiment. For the specific content distribution method, reference may be made to the related descriptions in the embodiments shown in FIGS. 3-6 above, which will not be repeated here.

Specifically, the interface circuit 20 is used to realize the communication connection between the central node and the content server and the edge cache server respectively.

Specifically, the memory 22 can be used to store software programs and application modules, and the processor 21 executes various functional applications and data processing of the central node by running the software programs and application modules stored in the memory 22 . The memory 22 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, at least one application required by a function (such as distributing content to be distributed), etc.; the data storage area may store content to be distributed, etc.

Wherein, the memory 22 may include a volatile memory, such as a high-speed random access memory (RAM, Random Access Memory), and the memory 22 may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state memory devices.

Specifically, the processor 21 is the control center of the central node, uses various interfaces and lines to connect various parts of the entire central node, runs or executes software programs and/or application modules stored in the memory 22, and calls the stored The data in the memory 22 executes various functions of the central node and processes data, so as to monitor the central node as a whole.

Wherein, the processor 21 may be a central processing unit (CPU, Central Processing Unit). The processor 101 may also be other general-purpose processors, digital signal processors (DSP, Digital Signal Processing) or other programmable logic devices or transistor logic devices, discrete hardware components, and the like. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

The system bus 23 may include a data bus, a power bus, a control bus, a signal status bus, and the like. In this embodiment, for the sake of clarity, various buses are shown as the system bus 23 in FIG. 9 .

The central node in the embodiment of the present invention refers to the operational statistical data, and determines that at least one edge cache server to be distributed in the first CDN and the content to be distributed by each edge cache server to be distributed can also be true and accurate. Reflect the access information of the content to be distributed in the first CDN, so that not only the storage space utilization rate of each edge cache server to be distributed is improved, but also the access requirements of users can be met, and the access overload of the edge cache server in the prior art is solved The problem.

Embodiment Four

An embodiment of the present invention provides a content server 1, and the content server 1 is configured to perform the steps performed by the content server in the above method. The content server 1 may include modules corresponding to corresponding steps. As shown in Figure 10, the content server 1 includes:

The acquiring unit 30 is configured to acquire operational statistical data, where the operational statistical data is statistical data of visits to the content to be distributed in the second content delivery network CDN.

A sending unit 31, configured to send a content distribution message to the first central node, where the content distribution message includes a content identifier of the content to be distributed, storage location information of the content to be distributed in the content server, and the acquiring unit 30 the acquired operation statistics data, the content distribution message is used to instruct the first central node to distribute the content to be distributed in the first CDN, and the first central node belongs to the first CDN.

Further, the sending unit 31 is specifically configured to send an operation statistics request message to a second central node if the identifier of the second CDN is obtained in the local content deployment operation management table, and the second central node belongs to the The second CDN, the local content deployment operation management table includes the mapping relationship between the identifier of the second CDN and the content identifier of the content to be distributed, and the operation statistics request message includes the content identifier of the content to be distributed, so The operation statistics request message is used to request the second central node to statistically analyze the traffic information of the content to be distributed in the second CDN.

Further, as shown in FIG. 11 , the content server 1 further includes a receiving unit 32,

The receiving unit 32 is configured to receive an operation statistics response message sent by the second central node, where the operation statistics response message includes the operation statistics data.

Further, the operation statistics request message further includes statistical parameters, and the operation statistics message is used to request the second central node to statistically analyze the traffic information of the content to be distributed in the second CDN according to the statistical parameters.

Preferably, the statistical parameters include at least one of regional granularity information, code rate, time stamp information, and traffic statistics period.

It can be understood that the content server 1 in this embodiment is only logically divided according to the functions realized by the content server 1 , and in practical applications, the above units can be superimposed or split. Moreover, the functions implemented by the content server 1 provided in this embodiment correspond one-to-one to the content distribution method provided by the above-mentioned method embodiment. For the more detailed processing flow implemented by the content server 1, it has been done in the above-mentioned method embodiment. Detailed description will not be described in detail here.

Another embodiment of the present invention provides a content server. As shown in FIG. 12 , the content server includes an interface circuit 40 , a processor 41 , a memory 42 and a system bus 43 .

Wherein, the interface circuit 40 , the processor 41 and the memory 42 are connected through the system bus 43 and communicate with each other.

Those skilled in the art can understand that the structure of the content server shown in FIG. 12 is not limited to the content server, which may include more or less components than shown in the figure, or combine some components, or arrange different components.

Specifically, when the content server is running, the content server executes the content distribution method of the embodiment as shown in FIGS. 3-6 . For the specific content distribution method, reference may be made to the related descriptions in the embodiments shown in FIGS. 3-6 above, which will not be repeated here.

Specifically, the interface circuit 40 is used to realize the communication connection between the content server and the central node.

Specifically, the memory 42 can be used to store software programs and application modules, and the processor 41 executes various functional applications and data processing of the content server by running the software programs and application modules stored in the memory 42 . The memory 42 may mainly include a program storage area. The program storage area may store an operating system, an application program required by at least one function (such as a content distribution message function) and the like.

Wherein, the memory 42 may include a volatile memory, such as a high-speed random access memory (RAM, Random Access Memory), and the memory 42 may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state memory devices.

Specifically, the processor 41 is the control center of the content server, uses various interfaces and lines to connect various parts of the entire content server, runs or executes software programs and/or application modules stored in the memory 42, and calls storage The data in the memory 42 executes various functions of the content server and processes data, thereby performing overall monitoring of the content server.

Wherein, the processor 41 may be a central processing unit (CPU, Central Processing Unit). The processor 41 may also be other general-purpose processors, digital signal processors (DSP, Digital Signal Processing) or other programmable logic devices or transistor logic devices, discrete hardware components, and the like. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

The system bus 43 may include a data bus, a power bus, a control bus, a signal status bus, and the like. In this embodiment, for the sake of clarity, various buses are shown as the system bus 43 in FIG. 12 .

When the content server in the embodiment of the present invention sends the content distribution message to the first central node, in addition to sending the content identification of the content to be distributed and the storage location information of the content to be distributed in the content server to the first central node, Sending the statistical data of the visit volume of the content to be distributed in the second content distribution network CDN to the first central node, so that the first central node can refer to the visit volume information of the content to be distributed when distributing the content to be distributed in the first CDN, Accurately determine the edge cache server to be distributed in the first CDN and the content to be distributed for each edge cache server to be distributed, thereby improving the storage space utilization rate of each edge cache server to be distributed, and can meet the user's access requirements It solves the problem of overloading access to the edge cache server in the prior art.

Embodiment five

An embodiment of the present invention provides a content distribution system. The content distribution system includes the central node as described in Embodiment 3, the content server as described in Embodiment 4, and at least one edge node managed by the central node. Each edge A node is composed of at least one edge cache server, wherein the content server is connected to the central node through a network, and the central node is connected to each edge cache server through a network.

The more detailed processing flow implemented by the central node has been described in detail in the third embodiment above, and will not be described in detail here.

The more detailed processing flow implemented by the content server has been described in detail in the fourth embodiment above, and will not be described in detail here.

Those skilled in the art can clearly understand that for the convenience and brevity of description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional modules according to needs. The internal structure of the device is divided into different functional modules to complete all or part of the functions described above. For the specific working process of the above-described system, device, and unit, reference may be made to the corresponding process in the foregoing method embodiments, and details are not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

A unit described as a separate component may or may not be physically separated, and a component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

While alternative embodiments of the present application have been described, additional changes and modifications to these embodiments may be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be interpreted to cover alternative embodiments and all changes and modifications that fall within the scope of the application.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (29)

1. a kind of content distribution method characterized by comprising

First central node obtains the content to be distributed in first content distribution network CDN and the operation system in the 2nd CDN It counts, the operation statistical data is in the 2nd CDN to the statistical data of the amount of access of the content to be distributed, institute It states the first central node and belongs to the first CDN；

First central node is believed according to the state of whole fringe nodes in the operation statistical data and the first CDN Breath, obtains the Distribution Results of content to be distributed, and the Distribution Results include at least one determining edge cache service to be distributed Device and the content that need to distribute for each edge cache server to be distributed；Wherein, each fringe node packet in the first CDN Contain one or more edge cache servers；

First central node is described to be distributed for each edge cache server distribution to be distributed according to the Distribution Results The content distributed for the edge cache server to be distributed is needed in content.

2. content distribution method according to claim 1, which is characterized in that first central node is obtained first Content to be distributed in CDN and the operation statistical data in the 2nd CDN, comprising:

The content distribution message that the first central node reception content server is sent, the content distribution message include described The content identification of content to be distributed, the content to be distributed the content server storage location information and the operation Statistical data；

First central node downloads the content to be distributed according to the content identification and the storage location information.

3. content distribution method according to claim 1, which is characterized in that the operation statistical data includes at least one In the amount of access information of each reference position information, the status information includes for reference position information and the content to be distributed The location information of each fringe node in first CDN；

Correspondingly, first central node is according to whole fringe nodes in the operation statistical data and the first CDN Status information, obtain the Distribution Results of content to be distributed, specifically include:

First central node is believed according to preset rules and the content to be distributed in the amount of access of each reference position information Breath, from described all referring to determining at least one purpose reference position information in location information；

First central node is that each purpose reference position information is chosen from the location information of whole fringe nodes The location information of one fringe node to be distributed, the fringe node to be distributed include at least one edge cache server；

First central node is determined according to the location information of each fringe node to be distributed for each fringe node to be distributed At least one edge cache server to be distributed.

4. content distribution method according to claim 2, which is characterized in that the operation statistical data includes at least one In the amount of access information of each reference position information, the status information includes for reference position information and the content to be distributed The location information of each fringe node in first CDN；

Correspondingly, first central node is according to whole fringe nodes in the operation statistical data and the first CDN Status information, obtain the Distribution Results of content to be distributed, specifically include:

First central node is believed according to preset rules and the content to be distributed in the amount of access of each reference position information Breath, from described all referring to determining at least one purpose reference position information in location information；

First central node is that each purpose reference position information is chosen from the location information of whole fringe nodes The location information of one fringe node to be distributed, the fringe node to be distributed include at least one edge cache server；

First central node is determined according to the location information of each fringe node to be distributed for each fringe node to be distributed At least one edge cache server to be distributed.

5. content distribution method according to claim 3, which is characterized in that at least one described purpose reference position The reference position information of the first mesh in information, first central node are from the location information of whole fringe nodes The reference position information of first mesh chooses the location information of the first fringe node to be distributed, specifically includes:

If it is identical as the reference position information of first mesh that there are the location informations of fringe node in the whole fringe node, Then the location information of the fringe node is determined as the location information of the first fringe node to be distributed by first central node；

If the reference position information of the location information and first mesh of the whole fringe node is all different, described first Central node chooses the location information of the first fringe node to be distributed from the location information of whole fringe nodes, wherein The location information and the distance between the reference position information of first mesh of first fringe node to be distributed are minimum.

6. content distribution method according to claim 5, which is characterized in that the content distribution message further includes purpose point Send out location information；

Correspondingly, first central node is each purpose reference bit confidence from the location information of whole fringe nodes After breath chooses the location information of a fringe node to be distributed, and first central node is each fringe node to be distributed Location information determine at least one edge cache server to be distributed before, the content distribution method further include:

If the location information of purpose distribution fringe node is not contained in the location information of at least one fringe node to be distributed, Then the location information of purpose distribution fringe node is determined as the position of fringe node to be distributed by first central node Information, the purpose distribution fringe node are contained in the purpose distribution location information.

7. content distribution method according to claim 6, which is characterized in that the status information further includes described first The storage space utilization of each edge cache server in CDN, the attribute value of each edge cache server and each side The memory space numerical value of edge cache server；

Correspondingly, for the position of the first fringe node to be distributed in the location information of at least one fringe node to be distributed For confidence breath, first central node is the first edge to be distributed according to the location information of the first fringe node to be distributed Node determines at least one edge cache server to be distributed, specifically includes:

First central node according to the content to be distributed the described first fringe node to be distributed amount of access information and First preset threshold, determination need to distribute the quantity N of the content to be distributed, N >=1 for the described first fringe node to be distributed；

According to preset condition, the whole edge caches for including from the described first fringe node to be distributed take first central node It is engaged in device, chooses X edge cache server as candidate edge cache server, wherein the preset condition is slow for edge The storage space utilization for depositing server is less than or equal to the second preset threshold, and the attribute value of the edge cache server is small In third predetermined threshold value, X >=1；

If N >=X, X candidate edge cache server is determined as edge cache service to be distributed by first central node Device；

If N < X, it is slow that first central node selects N number of candidate edge from the X candidate edge cache server Server is deposited, and N number of candidate edge cache server is determined as edge cache server to be distributed, N number of candidate Edge cache server is after the X candidate edge cache server is arranged successively from big to small according to free memory Top n.

8. content distribution method according to any one of claims 1-7, which is characterized in that the operation statistical data Including the content to be distributed at least one code rate amount of access information and the content to be distributed each code rate whole The amount of access information of content fragment；

For the first edge cache server to be distributed at least one edge cache server to be distributed, first center Node determination need to be the method for the content of the described first edge cache server distribution to be distributed, comprising:

First central node determines the free memory numerical value of the described first edge cache server to be distributed；

If the free memory numerical value of the first edge cache server to be distributed is less than the occupancy of the content to be distributed Space values, then first central node is according to the content to be distributed in the amount of access information of at least one code rate and described For content to be distributed in the amount of access information of the full content fragment of each code rate, it need to be described for determining that at least one content fragment is The content of first edge cache server distribution to be distributed, the occupied space numerical value of at least one content fragment is equal to described The free memory numerical value of first edge cache server to be distributed；

If the free memory numerical value of the first edge cache server to be distributed is greater than or equal to the content to be distributed Occupied space numerical value, then the content to be distributed is determined as being the described first edge to be distributed by first central node The content of cache server distribution.

9. content distribution method according to claim 8, which is characterized in that first central node is according to described wait divide Send out content at least one code rate amount of access information and the content to be distributed the full content fragment of each code rate visit The amount of asking information determines that at least one content fragment is the content that need to be the described first edge cache server distribution to be distributed, tool Body includes:

First central node chooses the maximum code rate of amount of access information；

First central node is according to the maximum code rate of the amount of access and the content to be distributed in the whole of the code rate The amount of access information for holding fragment, the maximum content fragment of amount of access information in the code rate is determined as need to be to be distributed for described first The content of edge cache server distribution, until the free memory numerical value of the described first edge cache server to be distributed is Zero.

10. content distribution method according to claim 8, which is characterized in that the operation statistical data includes at least one The amount of access information of a measurement period and the content to be distributed in each measurement period；

Correspondingly, first central node distributes institute according to the Distribution Results, for each edge cache server to be distributed After stating the content for needing to distribute in content to be distributed for the edge cache server to be distributed, the content distribution method is also wrapped It includes:

First central node, in the amount of access information of each measurement period, determines described wait divide according to the content to be distributed Content is sent out in the protection period of each of the first CDN edge cache server to be distributed；

First central node sends setting request to each edge cache server to be distributed, and the setting message includes institute Content to be distributed is stated in the protection period of the edge cache server to be distributed, the setting message is used to indicate each to be distributed Each protection period for distributing content self of edge cache server setting, the content of having distributed belong to the content to be distributed.

11. content distribution method according to claim 9, which is characterized in that the operation statistical data includes at least one The amount of access information of a measurement period and the content to be distributed in each measurement period；

Correspondingly, first central node distributes institute according to the Distribution Results, for each edge cache server to be distributed After stating the content for needing to distribute in content to be distributed for the edge cache server to be distributed, the content distribution method is also wrapped It includes:

First central node, in the amount of access information of each measurement period, determines described wait divide according to the content to be distributed Content is sent out in the protection period of each of the first CDN edge cache server to be distributed；

First central node sends setting request to each edge cache server to be distributed, and the setting message includes institute Content to be distributed is stated in the protection period of the edge cache server to be distributed, the setting message is used to indicate each to be distributed Each protection period for distributing content self of edge cache server setting, the content of having distributed belong to the content to be distributed.

12. a kind of content distribution method characterized by comprising

Content server obtains operation statistical data, and the operation statistical data is to treat in the second content distributing network CDN Distribute the statistical data of the amount of access of content；

The content server sends content distribution message to the first central node, and the content distribution message includes described wait divide Send out the content identification of content, the content to be distributed is counted in the storage location information of the content server and the operation Data, the content distribution message are used to indicate first central node and distribute the content to be distributed in the first CDN, First central node belongs to the first CDN.

13. content distribution method according to claim 12, which is characterized in that the content server obtains operation statistics Data specifically include:

If the content server gets the mark of the 2nd CDN in local content disposition operation management table, described interior Holding server and sends operation statistics request message to the second central node, second central node belongs to the 2nd CDN, this The content disposition operation management table on ground includes that the mark of the 2nd CDN is closed with the mapping of the content identification of the content to be distributed System, the operation statistics request message include the content identification of the content to be distributed, and the operation statistics request message is used for Second central node is requested to statistically analyze amount of access information of the content to be distributed in the 2nd CDN；

The content server receives the operation statistics response message that second central node is sent, the operation statistics response Message includes the operation statistical data.

14. content distribution method according to claim 13, which is characterized in that the operation counts request message and further includes Statistical parameter, the operation statistical message is for requesting second central node according to statistical parameter statistical analysis Amount of access information of the content to be distributed in the 2nd CDN, the statistical parameter include region granular information, code rate, timestamp letter At least one of breath, amount of access measurement period.

15. a kind of central node, which is characterized in that the central node is the first central node, comprising:

Acquiring unit, for obtaining the content to be distributed in first content distribution network CDN and the operation system in the 2nd CDN It counts, the operation statistical data is in the 2nd CDN to the statistical data of the amount of access of the content to be distributed, institute It states central node and belongs to the first CDN；

Determination unit, for complete in the operation statistical data according to the information acquired by the acquisition unit and the first CDN The status information of portion's fringe node, obtains the Distribution Results of content to be distributed, and the Distribution Results include at least one determining Edge cache server to be distributed and the content that need to distribute for each edge cache server to be distributed；Wherein, the first CDN In each fringe node include one or more edge cache servers；

Dispatching Unit, the Distribution Results for being determined according to the determination unit are each edge cache service to be distributed Device distributes the content for needing to distribute in the content to be distributed for the edge cache server to be distributed.

16. central node according to claim 15, which is characterized in that the central node further includes receiving unit,

The receiving unit, for the content distribution message that reception content server is sent, the content distribution message includes institute State the content identification of content to be distributed, the content to be distributed the content server storage location information and the fortune Seek statistical data；

The central node further includes download unit,

The download unit, the content identification and the storage location information for being received according to the receiving unit, Download the content to be distributed.

17. central node according to claim 15, which is characterized in that the operation statistical data includes at least one ginseng Location information and the content to be distributed are examined in the amount of access information of each reference position information, the status information includes institute State the location information of each fringe node in the first CDN；

The determination unit, is specifically used for:

According to preset rules and the content to be distributed each reference position information amount of access information, from it is described all referring to At least one purpose reference position information is determined in location information；

It is that each purpose reference position information chooses an edge section to be distributed from the location information of whole fringe nodes The location information of point, the fringe node to be distributed include at least one edge cache server；

According to the location information of each fringe node to be distributed, at least one side to be distributed is determined for each fringe node to be distributed Edge cache server.

18. central node according to claim 16, which is characterized in that the operation statistical data includes at least one ginseng Location information and the content to be distributed are examined in the amount of access information of each reference position information, the status information includes institute State the location information of each fringe node in the first CDN；

The determination unit, is specifically used for:

According to preset rules and the content to be distributed each reference position information amount of access information, from it is described all referring to At least one purpose reference position information is determined in location information；

It is that each purpose reference position information chooses an edge section to be distributed from the location information of whole fringe nodes The location information of point, the fringe node to be distributed include at least one edge cache server；

According to the location information of each fringe node to be distributed, at least one side to be distributed is determined for each fringe node to be distributed Edge cache server.

19. central node according to claim 17, which is characterized in that at least one described purpose reference bit confidence The reference position information of the first mesh in breath, the determination unit are specifically used for:

If it is identical as the reference position information of first mesh that there are the location informations of fringe node in the whole fringe node, The location information of the fringe node is then determined as to the location information of the first fringe node to be distributed；

If the reference position information of location information and first mesh of the whole fringe node is all different, from it is described entirely The location information of the first fringe node to be distributed is chosen in the location information of portion's fringe node, wherein described first is to be distributed Fringe node location information and the distance between the reference position information of first mesh it is minimum.

20. central node according to claim 19, which is characterized in that the content distribution message further includes purpose distribution Location information；

The determination unit is also used in the location information from whole fringe nodes be each purpose reference position information After the location information for choosing a fringe node to be distributed, and determined extremely for the location information of each fringe node to be distributed Before a few edge cache server to be distributed, if the location information of purpose distribution fringe node is not contained at least one In the location information of fringe node to be distributed, then the location information of purpose distribution fringe node is determined as edge to be distributed The location information of node, the purpose distribution fringe node are contained in the purpose distribution location information.

21. central node according to claim 20, which is characterized in that the status information further includes the first CDN In the storage space utilization of each edge cache server, the attribute value of each edge cache server and each edge it is slow Deposit the memory space numerical value of server；

For the location information of the first fringe node to be distributed in the location information of at least one fringe node to be distributed For, the determination unit is specifically used for:

According to the content to be distributed in the amount of access information and the first preset threshold of the described first fringe node to be distributed, determine The quantity N of the content to be distributed, N >=1 need to be distributed for the described first fringe node to be distributed；

According to preset condition, from whole edge cache servers that the described first fringe node to be distributed includes, X side is chosen Edge cache server is as candidate edge cache server, wherein the preset condition is that the storage of edge cache server is empty Between utilization rate be less than or equal to the second preset threshold, and the attribute value of the edge cache server be less than third predetermined threshold value, X ≥1；

If N >=X, X candidate edge cache server is determined as edge cache server to be distributed；

If N < X, N number of candidate edge cache server is selected from the X candidate edge cache server, and will be described N number of candidate edge cache server is determined as edge cache server to be distributed, and N number of candidate edge cache server is institute State the top n after X candidate edge cache server is arranged successively from big to small according to free memory.

22. central node described in any one of 5-21 according to claim 1, which is characterized in that the operation statistical data Including the content to be distributed at least one code rate amount of access information and the content to be distributed each code rate whole The amount of access information of content fragment；

It is described determining single for the first edge cache server to be distributed at least one edge cache server to be distributed Member is specifically used for:

Determine the free memory numerical value of the described first edge cache server to be distributed；

If the free memory numerical value of the first edge cache server to be distributed is less than the occupancy of the content to be distributed Space values, then according to the content to be distributed in the amount of access information of at least one code rate and the content to be distributed each The amount of access information of the full content fragment of code rate, determining that at least one content fragment is need to be that the described first edge to be distributed is slow The content of server distribution is deposited, the occupied space numerical value of at least one content fragment is slow equal to the described first edge to be distributed Deposit the free memory numerical value of server；

If the free memory numerical value of the first edge cache server to be distributed is greater than or equal to the content to be distributed Occupied space numerical value, then the content to be distributed is determined as need to be the described first edge cache server to be distributed distribution Content.

23. central node according to claim 22, which is characterized in that the determination unit is specifically used for:

Choose the maximum code rate of amount of access information；

Believed according to the maximum code rate of the amount of access and the content to be distributed in the amount of access of the full content fragment of the code rate The maximum content fragment of amount of access information in the code rate is determined as being the described first edge cache server to be distributed point by breath The content of hair, until the free memory numerical value of the described first edge cache server to be distributed is zero.

24. central node according to claim 22, which is characterized in that the operation statistical data includes at least one system Period and the content to be distributed are counted in the amount of access information of each measurement period；

The determination unit is also used in the Dispatching Unit according to the Distribution Results, for each edge cache clothes to be distributed After business device distributes the content for needing to distribute in the content to be distributed for the edge cache server to be distributed, according to described wait divide Content is sent out in the amount of access information of each measurement period, determines the content to be distributed on the side to be distributed each of the first CDN The protection period of edge cache server；

The central node further includes transmission unit,

The transmission unit, for sending setting request to each edge cache server to be distributed, the setting message includes In the protection period of the edge cache server to be distributed, the setting disappears the content to be distributed that the determination unit determines Breath is used to indicate each each protection period for distributing content self of edge cache server setting to be distributed, described to have distributed content Belong to the content to be distributed.

25. central node according to claim 23, which is characterized in that the operation statistical data includes at least one system Period and the content to be distributed are counted in the amount of access information of each measurement period；

The determination unit is also used in the Dispatching Unit according to the Distribution Results, for each edge cache clothes to be distributed After business device distributes the content for needing to distribute in the content to be distributed for the edge cache server to be distributed, according to described wait divide Content is sent out in the amount of access information of each measurement period, determines the content to be distributed on the side to be distributed each of the first CDN The protection period of edge cache server；

The central node further includes transmission unit,

The transmission unit, for sending setting request to each edge cache server to be distributed, the setting message includes In the protection period of the edge cache server to be distributed, the setting disappears the content to be distributed that the determination unit determines Breath is used to indicate each each protection period for distributing content self of edge cache server setting to be distributed, described to have distributed content Belong to the content to be distributed.

26. a kind of content server characterized by comprising

Acquiring unit, for obtaining operation statistical data, the operation statistical data is right in the second content distributing network CDN The statistical data of the amount of access of content to be distributed；

Transmission unit, for sending content distribution message to the first central node, the content distribution message includes described wait divide Send out the content identification of content, the content to be distributed the content server storage location information and the acquiring unit The operation statistical data got, the content distribution message is used to indicate first central node will be described to be distributed Content is distributed in the first CDN, and first central node belongs to the first CDN.

27. content server according to claim 26, which is characterized in that

The transmission unit, if specifically for the mark for getting the 2nd CDN in local content disposition operation management table, Operation statistics request message is sent to the second central node, second central node belongs to the 2nd CDN, local content Deployment operation management table includes the mark and the mapping relations of the content identification of the content to be distributed of the 2nd CDN, described Operation statistics request message includes the content identification of the content to be distributed, and the operation statistics request message is described for requesting Second central node statisticallys analyze amount of access information of the content to be distributed in the 2nd CDN；

The content server further includes receiving unit,

The receiving unit counts response message, the operation statistics for receiving the operation that second central node is sent Response message includes the operation statistical data.

28. content server according to claim 27, which is characterized in that

The operation statistics request message further includes statistical parameter, and the operation statistical message is for requesting second centromere Point statisticallys analyze amount of access information of the content to be distributed in the 2nd CDN, the statistical parameter according to the statistical parameter Include at least one of region granular information, code rate, timestamp information, amount of access measurement period.

29. a kind of content distribution system, which is characterized in that in as described in any one of the claims 15-25 Heart node, the content server as described in any one of the claims 26-28 and the central node management are extremely A few fringe node, each fringe node are made of at least one edge cache server, the content server with it is described By network connection between central node, pass through network connection between the central node and each edge cache server.