CN102638483B - A kind of defining method of content distribution nodes, equipment and system - Google Patents

Abstract

The invention discloses a method, device and system for determining a content distribution node, which are used to determine the best content distribution node for providing services to users, wherein the method includes: a domain index server obtains a user's access request; and according to The URL information of the webpage that the user requests to visit carried in the access request is searched for the correspondence between the URL information of the webpage and the node identification information of each content distribution node that stores the webpage content of the webpage. The node identification information of each content distribution node; the domain index server determines the content distribution node that provides services for the user among the content distribution nodes corresponding to the found node identification information.

Description

Method, device and system for determining a content distribution node

technical field

The present invention relates to the field of network technology, in particular to a method, device and system for determining a content distribution node.

Background technique

The website guides the access request submitted by the user to a certain website through the public domain name system (DNS, Domain Name System) to the content distribution network (CDN, Content Delivery Network) system, and then selects the content distribution node closest to the user to provide the user with web content, so as to Realize the rapid distribution of web pages, and solve the problem of slow response speed of users visiting websites due to reasons such as small network bandwidth, large number of user visits, and uneven distribution of outlets. Among them, the structure between each public DNS is a tree structure, wherein each node in the tree structure represents a public DNS, and only the leaf nodes located in the tree structure can be called local DNS. The request first hits the local DNS.

In the prior art, the access requests of all users in the same domain to the same website will be directed to the same CDN system, that is, a one-to-one correspondence between the website and the CDN system is preset. The prior art generally processes the user's access request according to the following process: 1. The user submits an access request to the browser, which includes the URL of the webpage the user requests to visit; 2. The browser sends the access request to the local DNS; 3. The local DNS searches for the CDN system corresponding to the website address in the access request in each CDN system of the domain; 4. The local DNS sends the user's access request to the takeover DNS in the found CDN system (in the prior art, Each CDN system is all configured with a takeover DNS); 5. Taking over the DNS in each CDN cache server of the CDN system, based on the user's geographic location information, determines the CDN cache server closest to the user, wherein the user's geographic location Generally determined according to the user's Internet Protocol (IP, Internet Protocol) address, the takeover DNS returns the IP address of the determined CDN cache server to the local DNS; 6, the local DNS returns the received IP address to the browser; 7, the browser According to the IP address, an access request is submitted to the CDN cache server, and the access request includes the URL of the web page requested by the user; The browser returns the webpage content. If the webpage content of the webpage is not saved, the corresponding webpage content is obtained from the source site and returned to the browser, and the obtained webpage content is saved locally.

At present, any single CDN system cannot cover all locations in a certain region, so CDN system service providers will deploy multiple CDN systems in the same region to achieve complementary geographical coverage. However, in the prior art, since the website and the CDN system adopt a one-to-one fixed configuration, that is, the local DNS can only guide the user's access request to the CDN system corresponding to the website requested by the user in this domain, and from the CDN Based on the geographical location information of the user, the system selects the CDN cache server (also called the content distribution node) closest to the user to provide services for the user, that is, to provide the user with the webpage content corresponding to the URL to be accessed. The content distribution node is only the corresponding CDN The content distribution node closest to the user in the system, not necessarily the content distribution node with the best distribution quality or the closest distance to the user in all CDN systems, even if content distribution nodes in other CDN systems also store the web page content of the web page, and These content distribution nodes are closer to the user or have better distribution quality. The local DNS still directs the user's access request to the content distribution node in the CDN system corresponding to the domain and the URL, so that the content distribution node that finally provides services to the user does not It is not an optimal content distribution node, so the processing efficiency of the content distribution node to provide users with webpage content is low.

Contents of the invention

Embodiments of the present invention provide a method, device, and system for determining a content distribution node, which are used to determine the best content distribution node for providing services to users, and improve the processing efficiency of the content distribution node when providing webpage content for users.

An embodiment of the present invention provides a method for determining a content distribution node, including:

The domain index server obtains the user's access request; and

According to the URL information of the webpage requested by the user carried in the access request, search for the URL information in the corresponding relationship between the URL information of the webpage and the node identification information of each content distribution node storing the webpage content of the webpage Node identification information of each corresponding content distribution node;

The domain index server determines the content distribution node that provides the service for the user among the content distribution nodes corresponding to the identified node identification information.

An embodiment of the present invention provides a domain index server, including:

The storage unit is used for storing the corresponding relationship between the URL information of the webpage and the node identification information of each content distribution node storing the webpage content of the webpage;

an obtaining unit, configured to obtain a user's access request;

The search unit is configured to use the website address information of the webpage that the user requests to visit carried in the access request obtained by the obtaining unit, the website address information of the webpage stored in the storage unit, and the information of each content distribution node that stores the webpage content of the webpage In the corresponding relationship between the node identification information, look up the node identification information of each content distribution node corresponding to the website information;

The determining unit is configured to determine, among the content distribution nodes corresponding to each node identification information searched by the search unit, according to a preset determination rule, a content distribution node that provides services for the user.

An embodiment of the present invention provides a method for determining a content distribution node, including:

The global index server receives the access request sent by the first domain index server; and

According to the website address information of the webpage requested by the user carried in the access request, search for the server identification information of the second domain index server corresponding to the website address information;

The global index server determines a second domain index server that satisfies a preset condition among the second domain index servers corresponding to the identified server identification information; and

Sending the access request to the determined second domain index server, instructing the second domain index server to determine a content distribution node that provides services for the user.

An embodiment of the present invention provides a global index server, including:

The storage unit is used to store the corresponding relationship between the URL information of the webpage and the server identification information of the second domain index server to which each content distribution node that stores the webpage content of the webpage belongs;

The receiving unit is configured to receive the user's access request sent by the first domain index server, the access request carrying the URL information of the webpage the user requests to visit;

The search unit is configured to, according to the website information carried in the user's access request received by the receiving unit, store the website information of the webpage stored in the storage unit and the second domain index to which each content distribution node that stores the webpage content of the webpage belongs to In the corresponding relationship of the server identification information of the server, search for the server identification information of the second domain index server corresponding to the URL information;

A determining unit, configured to determine, among the second domain index servers corresponding to the searched server identification information, a second domain index server that satisfies a preset condition;

A sending unit, configured to send the access request to the second domain index server determined by the determining unit, and instruct the second domain index server to determine a content distribution node that provides services for the user.

An embodiment of the present invention provides a system for determining a content distribution node, including:

The first domain index server is used to obtain the user's access request, and the access request carries the URL information of the web page that the user requests to visit; according to the URL information carried in the access request, the URL information of the web page and the web page are stored In the corresponding relationship between the node identification information of each content distribution node of the webpage content, search for the node identification information of each content distribution node corresponding to the website information; in the found content distribution node corresponding to each node identification information, According to a preset determination rule, determine a content distribution node that provides services for the user; and when no content distribution node that provides services for the user is determined, send the obtained user's access request to the global index server , the access request carries URL information of the webpage requested by the user;

The global index server is configured to receive the user's access request sent by the first domain index server; according to the URL information carried in the access request, search for the server identifier of the second domain index server corresponding to the URL information information; among the second domain index servers corresponding to the searched server identification information, determine the second domain index server that meets the preset condition; and send the access request to the determined second domain index server, indicating The second domain index server determines a content distribution node that provides services for the user;

The second domain index server is configured to determine a content distribution node that provides services to the user, wherein, when the second domain server determines the content distribution node that provides services to the user, according to the URL information carried in the access request, In the corresponding relationship between the network address information of the web page and the node identification information of each content distribution node that stores the content of the web page, search for the node identification information of each content distribution node corresponding to the network address information, and for each found The content distribution node corresponding to the node identification information respectively determines the distribution weight value of the content distribution node, and according to the determined distribution weight values, among the content distribution nodes corresponding to the found node identification information, determine to provide The content distribution node of the service.

In the method, device, and system for determining a content distribution node provided by the embodiments of the present invention, the domain index server first searches for and caches all content distribution sites that have cached the web page content corresponding to the web address information according to the obtained web address information carried in the user's access request. The node identification information of the node, and then according to the preset determination rules, determine the content distribution node that provides services for the user from the content distribution nodes corresponding to the found node identification information. In this way, because the domain index server follows the preset rules , determine the content distribution node that provides services to users from all the content distribution nodes that have cached the web page content corresponding to the URL information, instead of searching for the content distribution node from a CDN system corresponding to the URL information, so finally determine the The content distribution node that provides services for users is the best content distribution node, which effectively improves the processing efficiency of content distribution nodes when providing services for users.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

Fig. 1 is a schematic diagram of the implementation process of the method for determining the content distribution node on the domain index server side;

FIG. 2 is a schematic diagram of an implementation process for determining a content distribution node that provides services to users when the domain index server finds the identification information of each node of the corresponding content distribution node in an embodiment of the present invention;

FIG. 3 is a schematic diagram of an implementation process for determining a content distribution node that provides services to users when the domain index server does not find the identification information of each node of the corresponding content distribution node in an embodiment of the present invention;

FIG. 4 is a schematic diagram of an implementation process for determining a content distribution node that provides services to users when the first domain index server is overloaded in an embodiment of the present invention;

FIG. 5 is a schematic diagram of a possible structure of a domain index server in an embodiment of the present invention;

FIG. 6 is a schematic diagram of an implementation flow of a method for determining content distribution nodes on the global server side in an embodiment of the present invention;

FIG. 7 is a schematic diagram of a possible structure of a global index server in an embodiment of the present invention;

FIG. 8 is a schematic diagram of a possible structure of a system for determining a content distribution node in an embodiment of the present invention.

detailed description

In order to achieve the purpose of determining the best content distribution node for providing services to users, and to improve the processing efficiency of content distribution nodes when providing web page content for users, the embodiments of the present invention provide a method, device and system for determining content distribution nodes .

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention, and in the absence of conflict, the present invention The embodiments and the features in the embodiments can be combined with each other.

The content distribution nodes involved in the present invention are not limited to the content distribution nodes in the Web system, WebCache system and CDN system, and may also be user nodes with service capabilities.

As shown in FIG. 1, it is a schematic flow diagram of the implementation process of the method for determining the content distribution node on the domain index server side in the embodiment of the present invention, including;

S11. The domain index server obtains the user's access request;

S12. According to the URL information of the webpage requested by the user carried in the access request, search for the URL in the corresponding relationship between the URL information of the webpage and the node identification information of each content distribution node storing the webpage content of the webpage Node identification information of each content distribution node corresponding to the information;

S13. The domain index server determines, among the content distribution nodes corresponding to the searched node identification information, a content distribution node that provides services for the user according to a preset determination rule.

In a specific implementation, the domain index server may store the correspondence between the URL information of the web page and the node identification information of each content distribution node storing the web content of the web page in a table format. The storage format of the corresponding relationship is not limited to this, as long as it is a format that is convenient for storage and management.

In a specific implementation, the node identification information of the content distribution node is usually represented by an IP address.

A possible storage format is shown in Table 1:

Table 1

Among them, the field "type" includes two types, which are marked with "0" and "1" respectively. When the type is "0", it means that the content distribution node that caches the webpage content corresponding to the URL information belongs to this domain; when the type When it is "1", it means that the content distribution node that caches the webpage content corresponding to the URL information belongs to other domains except this domain. Domains can be divided simply based on IP addresses, or based on routing hops, or other methods. Among them, for the records whose type is "1", the domain index server can base on the number of visits to the corresponding website information by users in the domain within a certain period of time, and the preset hotspot judgment conditions (such as the number of visits by users within 1 hour reaches 100 times), when the number of visits of the website information reaches the hotspot judgment condition, the domain index server sends a notification message to all content distribution nodes in the domain, notifying each content distribution node to increase the cache of the webpage content corresponding to the website information, Each content distribution node increases the cache of the web page content corresponding to the URL information according to the received notification message, and then reports to the domain index server, and the domain index server stores the URL information and A corresponding record is added to the corresponding relationship between the node identification information of each content distribution node that stores the web page content of the web page.

The determination rules involved in step S12 can be but not limited to the following two ways:

method one

Based on the principle of the closest geographical location of the user: among the content distribution nodes corresponding to the searched node identification information, determine the content distribution node closest to the user's location as the content distribution node that provides services for the user. That is, based on the user's geographic location information principle, among all the distribution nodes that have cached the webpage content corresponding to the URL requested by the user, the content distribution node that is geographically closest to the user is determined as the content distribution node that provides services for the user.

way two

Based on the distribution weight value principle of each content distribution node: for the content distribution node corresponding to each found node identification information, respectively determine the distribution weight value of the content distribution node; Among the content distribution nodes corresponding to the node identification information, a content distribution node that provides services for the user is determined.

Specifically, the distribution weight value of each content distribution node can be determined as follows:

Acquiring parameter values of each node parameter of the content distribution node;

The distribution weight value of the content distribution node is determined according to the obtained parameter value of each node parameter and the weight factor of each node parameter.

Wherein, the node parameters may include but not limited to evaluation parameters, quality parameters and link parameters of the content distribution node.

Embodiment one

The method for determining the distribution weight value of the content distribution node in the CDN system is taken as an example to describe below. For ease of description, the content distribution node in the CDN system uses the distribution weight value determination method Q(N) to represent the evaluation parameter of the content distribution node, Q(P) to represent the quality parameter of the content distribution node, and Q(L) to represent Link parameters for content distribution nodes. Among them, the evaluation parameters of the content distribution node may include: information such as the load, bandwidth, processing power, and health status of the content distribution node; the quality parameters may include: the refresh frequency of the web page requested by the user, etc. The settings are different; link parameters may include network connectivity, response speed, etc., and may be specifically expressed by parameters such as round-trip delay (RTT, Round-TripTime). All the above parameters can be obtained from the CDN system. In specific implementation, the value range of each parameter can be divided into n consecutive different intervals, and a scoring value is given for each interval, and the value range of the scoring value is [0, 1]. Take the quality parameter as an example , you can pre-set the score value corresponding to the refresh frequency of the webpage between 5s and 10s to 0.9, and the score system corresponding to the refresh frequency of the webpage between 10s and 15s to be 0.856. By analogy, different refresh frequencies correspond to different score values. In this way, score values corresponding to different evaluation parameters, quality parameters and link parameters can be determined. Each quality evaluation value is normalized, and the distribution weight value of each content distribution node can be determined by using a classification weighting method according to the normalized evaluation values. That is, weight factors are preset for evaluation parameters, quality parameters, and link parameters. The value range of each weight factor is [0, 1], and the sum of each weight factor is 1. The distribution weight value Q can be determined by the following formula:

Q=uQ(N)+vQ(P)+rQ(l), u+v+l=1

Among them, u, v, and l represent the weighting factors of evaluation parameters, quality parameters, and link parameters, respectively. In this way, the greater the distribution weight value, the better the comprehensive evaluation of the content distribution node, and the domain index server can determine the content distribution node with the largest distribution weight value as the content distribution node that provides services for users.

In specific implementation, if the content distribution nodes are determined based on the distribution weight value principle of each content distribution node, the domain index server also needs to store the corresponding relationship between each content distribution node and the distribution weight value of each content distribution node, specifically, the domain index The server may store and manage the table in a table format, but the storage format of the corresponding relationship is not limited to this, as long as it is convenient for storage and management.

A possible storage format is shown in Table 2:

Table 2

node identification information Distribution weight value 201.143.18.4 0.1

211.153.28.144 0.9 201.143.21.68 0.8 211.153.58.46 0.95 205.125.43.4 0.67 205.125.43.68 0.52

Preferably, the domain index server may also store each URL information, the distribution node that has cached the webpage content corresponding to the URL information, and the distribution weight value corresponding to each content distribution node in a table. A possible table structure is shown in Table 3. For the convenience of description, Table 3 is referred to as the content distribution node selection table in the embodiment of the present invention:

table 3

In specific implementation, each of the corresponding relationships between the URL information of the webpage stored by the index server and the node identification information of each content distribution node storing the webpage content of the webpage can be periodically sent to the index server according to the preset axis system. The content distribution nodes corresponding to the node identification information (including content distribution nodes in this domain and content distribution nodes in other domains) send a node parameter report message, and update the corresponding records in the corresponding relationship according to the received response message, so as to ensure the domain index The server can obtain continuously increasing records and node parameter update data of each content distribution node.

In specific implementation, the method for determining the content distribution node also includes:

According to the user identification information contained in the access request, the domain index server sends the determined node identification information of the content distribution node to the user, instructing the user to obtain the requested access from the content distribution node corresponding to the received node identification information. The page content of the page.

Embodiment two

In the specific implementation, after the domain index server receives the access request submitted by the user in the domain through the web browser, if the domain index server stores the web address information of the web page itself and the content distribution nodes that store the web page content In the corresponding relationship between the node identification information, when the identification information of each node of the corresponding content distribution node is found, the content distribution node that provides services for the user is determined according to the following process. Specifically, as shown in FIG. 2 , a schematic diagram of an implementation process for determining a content distribution node that provides services to users for the domain index server includes the following steps:

S21. The domain index server receives the access request submitted by the user in the domain through the browser, and the access request carries the user identification information of the user and the website address information of the webpage requested by the user;

S22. The domain index server finds the node identification information of the content distribution node that caches the URL information in the content distribution node selection table stored by itself;

S23. According to the found identification information of each node, determine the distribution weight value corresponding to each node identification information, or determine the node identification information of the content distribution node closest to the user;

S24. Send the node identification information with the largest distribution weight value to the user, or send the node identification information of the content distribution node closest to the user to the user.

Embodiment three

In specific implementation, if the domain index server does not find each node of the corresponding content distribution node in the corresponding relationship between the URL information of the web page stored by itself and the node identification information of each content distribution node that stores the web page content of the web page When identifying information, the obtained access request is sent to the global index server.

Specifically, the domain index server replaces the user identification information contained in the access request with its own server identification information, and then sends it to the global index server.

In specific implementation, the method for determining the content distribution node also includes:

The domain index server receives the node identification information of the content distribution node sent by other domain index servers;

Sending the received node identification information of the content distribution node to the user, instructing the user to obtain the web page content of the web page requested to be accessed from the content distribution node corresponding to the received node identification information.

In specific implementation, the method for determining the content distribution node also includes:

The domain index server receives the node identification information of the content distribution node sent by other domain index servers;

According to the received node identification information, the domain index server updates the stored correspondence between the URL information of the web page and the node identification information of each content distribution node storing the content of the web page.

In specific implementation, if the access request obtained by the domain index server includes the server identification information of the domain index server in the domain where the user is located, the method for determining the content distribution node further includes:

According to the server identification information of the domain index server of the user's domain, the determined node identification information of the content distribution node is sent to the domain index server of the user's domain.

As shown in FIG. 3 , it is a schematic diagram of an implementation flow for determining a content distribution node that provides services to a user when the domain index server does not find the corresponding node identification information of the content distribution node. For ease of understanding, an example is taken in which a user submits an access request to a news webpage news.people.cn/w/2010-11-16/193621481681.shtml. For ease of description, the domain index server that the user's access request first reaches is called the first domain index server, and the domain index server that determines the content distribution node that provides services for the user is called the second domain index server. Specifically, it includes the following step:

S31. The first domain index server receives an access request submitted by a user in the domain through a browser, and the access request carries the user identification information of the user and the website address information of the webpage requested by the user;

Specifically, the user submits an access request for accessing news.people.cn/w/2010-11-16/193621481681.shtml to the first domain index server through the browser, and the access request carries the user's user identification information (assumed to be IP address 196.153.24.26), news.people.cn/w/2010-11-16/193621481681.shtml;

S32. The first domain index server does not find the node identification information of the content distribution node that caches the URL information in the content distribution node selection table stored by itself;

Specifically, the first domain index server did not find a record with the URL information news.people.cn/w/2010-11-16/193621481681.shtml in the content distribution node selection table stored by itself;

S33. The first domain index server sends the received user access request to the global index server;

Specifically, the first domain index server modifies the user's IP address carried in the user's access request to its own server identification information (which may be an IP address, assuming 10.196.28.22), and then sends it to the global index server;

S34. The global index server searches for and stores the server identification information of each domain index server corresponding to the website information, if found, executes step S37; if not found, executes step S35;

Specifically, the global index server searches for each domain corresponding to the URL information stored in the corresponding relationship between the URL information of the webpage stored by itself and the server identification information of the domain index server to which each content distribution node storing the webpage content of the webpage belongs. The server identification information of the index server;

S35. The global index server aggregates the URL information carried in the access request according to the preset URL aggregation level;

Specifically, assume that the URL news.people.cn/w/2010-11-16/ is obtained after the first aggregation of the URL information news.people.cn/w/2010-11-16/193621481681.shtml by the global index server;

S36. According to the aggregated URL information, the global index server searches for and stores the server identification information of each domain index server corresponding to the aggregated URL information;

Specifically, the global index server searches for the URL corresponding to the aggregated URL stored in the corresponding relationship between the URL information of the webpage stored by itself and the server identification information of the domain index server to which each content distribution node that stores the webpage content of the webpage belongs. The server identification information of each domain index server, if the server identification information of each domain index server corresponding to the URL information after the first aggregation is not found; perform the second aggregation on the URL information after the first aggregation news.people .cn/w/2010-11-16/ URL information after the second aggregation news.people.cn/w/, and so on, because the global index server records the aggregated URLs of different aggregation levels of all URLs, because The global index server records the aggregated URLs of different aggregation levels of all URLs, so as long as there is a cache of the webpage in the network, it can be found;

S37. The global index server determines, from among the domain index servers corresponding to the found identification information of each domain index server, that the domain index server that meets the preset condition is the second domain index server;

Specifically, the preset condition can be set as the domain index server with the lowest aggregation level;

S38. The global index server forwards the received access request to the second domain index server corresponding to the determined server identification information of the second domain index server;

S39. The second domain index server determines, according to the URL information carried in the received access request, a content distribution node that provides services for the user;

Specifically, according to the news.people.cn/w/2010-11-16/193621481681.shtml carried in the access request, the second domain server, in the URL information of the webpage and the node of each content distribution node storing the webpage content of the webpage In the correspondence between identification information, search for the node identification information of each content distribution node corresponding to news.people.cn/w/2010-11-16/193621481681.shtml, and for the content corresponding to each node identification information found The distribution node determines the distribution weight value of the content distribution node respectively, and determines the content distribution node that provides services for the user among the content distribution nodes corresponding to the found identification information of each node according to the determined distribution weight values;

S310. The second domain index server sends the determined node identification information of the content distribution node to the first domain index server;

Specifically, the second domain index server sends the server identification information of the first domain index server carried in the received access request to the first domain index server;

S311. The first domain index server forwards the received node identification information of the content distribution node to the user, and adds a corresponding record in the content distribution node selection table.

In a specific implementation, the user identifies information according to the received node. The corresponding web page content is requested from the content distribution node corresponding to the node identification information.

In specific implementation, if the second domain index server does not find news.people.cn/ When w/2010-11-16/193621481681.shtml corresponds to the node identification information of each content distribution node, a response message with an empty result is returned to the first domain index server, and the first domain index server sends all the content distribution nodes in the domain The node identification information of the content distribution node closest to the user or with the highest distribution weight value is sent to the user. When the user requests news.people.cn/w/2010 from the corresponding content distribution node based on the received node identification information of the content distribution node -11-16/193621481681.shtml corresponding to the webpage content, the content distribution node's own miss mechanism processes the user's request. Generally, when the content distribution node misses the webpage content corresponding to the webpage requested by the user, it will send a request to the source After obtaining the corresponding webpage content, the website provides the requested webpage content for the user, caches the webpage content, and notifies the first domain index server, and the first domain index server sends the node identification information and URL information of the current content distribution node and the The distribution weight value of the content distribution node is added to the correspondence between the URL information of the webpage and the node identification information of each content distribution node storing the webpage content of the webpage.

Embodiment four

In addition, when a large number of users in a domain request to access the same web page at the same time, and the web page is a hot web page, all access requests will be directed to the best content distribution node in the domain, causing the content distribution node to be overloaded. This results in a bottleneck in the distribution efficiency of the content distribution node for distributing content to users, and in serious cases may cause the content distribution node to fail to work normally.

In order to solve the above problem, the method for determining the content distribution node provided by the embodiment of the present invention further includes: if the first domain index server searches for the node identification information of each content distribution node corresponding to the URL information carried in the received access request , when it detects that its own load exceeds the preset threshold, it sends the obtained access request to the global index server.

Specifically, the first domain index server directly forwards the received access request to the global index server without any processing.

As shown in FIG. 4 , when the load of the first domain index server provided by the embodiment of the present invention is too heavy, the implementation flow diagram of determining the content distribution node that provides services to users includes the following steps:

S41. The first domain index server receives the access request submitted by the user in the domain through the browser, and the access request carries the user identification information of the user and the URL information of the webpage requested by the user;

S42. The first domain index server detects that its own load is too heavy;

The implementation process of step S43 and step S48 is similar to the implementation process of step S33 to step S38, and will not be repeated here;

S49. The second domain index server sends the determined node identification information of the content distribution node to the user;

Specifically, the second domain index server sends the determined node identification information of the content distribution node to the user according to the user identification information carried in the received access request.

In the specific implementation, after the user receives the node identification information of the content distribution node, the process of requesting the corresponding web page content and the processing process and embodiment of the second domain index server not determining the node identification information of the content distribution node that provides services for the user The three are similar and will not be repeated here.

Generally speaking, the node identification information of the content distribution node involved in the present invention is the IP address of the content distribution node, the user identification information of the user is the user's IP address, and the server identification information of the domain index server is the IP address of the domain index server.

Based on the same inventive concept, an embodiment of the present invention also provides a domain index server, another method for determining a content distribution node, a global index server, and a system for determining a content distribution node. Since these devices and methods solve The principle of the problem is similar to the method for determining the content distribution node above, so the implementation of these devices and methods can refer to the implementation of the method for determining the content distribution node above, and the repetition will not be repeated.

As shown in FIG. 5, it is a schematic structural diagram of a possible domain index server provided by the embodiment of the present invention, including;

The storage unit 51 is used to store the correspondence between the URL information of the webpage and the node identification information of each content distribution node storing the webpage content of the webpage;

Obtaining unit 52, configured to obtain the user's access request, the access request carrying the URL information of the webpage the user requests to visit;

The search unit 53 is used to obtain the website address information of the webpage that the user requests to visit carried in the access request obtained by the obtaining unit 52, the website address information of the webpage stored in the storage unit 51 and the nodes of each content distribution node that stores the webpage content of the webpage In the corresponding relationship between the identification information, look up the node identification information of each content distribution node corresponding to the website information;

The determining unit 54 is configured to determine, among the content distribution nodes corresponding to each node identification information searched by the searching unit 53, a content distribution node that provides services for the user according to a preset determination rule.

Wherein, the access request obtained by the obtaining unit 52 also includes the user identification information of the user; and the domain index server also includes:

The first sending unit 55 is configured to send the node identification information of the content distribution node determined by the determining unit 54 to the user according to the user identification information contained in the access request obtained by the obtaining unit 52, and instruct the user to obtain The web page content of the web page requested to be accessed is obtained from the content distribution node corresponding to the node identification information.

Specifically, the obtaining unit 52 is configured to receive an access request submitted by a user in the domain through a web browser.

In specific implementation, the domain index server also includes:

The second sending unit 56 is used to send the obtained access request obtained by the obtaining unit 52 to Global index server.

Specifically, the second sending unit 56 is configured to replace the user identification information contained in the access request with the server identification information of the domain index server, and then send it to the global index server.

In specific implementation, the domain index server also includes:

The first receiving unit 57 is configured to receive node identification information of content distribution nodes sent by other domain servers;

The first sending unit 55 is further configured to send the node identification information of the content distribution node received by the first receiving unit 57 to the user, instructing the user to obtain the requested access information from the content distribution node corresponding to the received node identification information. The web content of the web page.

In specific implementation, the domain index server also includes:

The second receiving unit 58 is configured to receive node identification information of content distribution nodes sent by other domain index servers;

The updating unit 59 is configured to update the stored correspondence between the URL information of the webpage and the node identification information of each content distribution node storing the webpage content of the webpage according to the node identification information received by the second receiving unit 58 .

In specific implementation, the domain index server also includes:

The third sending unit 510 is used to obtain the access request obtained by the obtaining unit 52 if the domain index server detects that its own load exceeds a preset threshold before searching for the node identification information of each content distribution node corresponding to the website information. Sent to the global index server.

Specifically, the obtaining unit 52 is configured to receive a user's access request sent by the global index server.

In a specific implementation, the access request obtained by the obtaining unit includes the server identification information of the domain index server of the domain where the user is located; and

Domain Index Server, also includes:

The fourth sending unit 511 is configured to send the node identification information of the content distribution node determined by the determining unit 54 to the domain index server of the user's domain according to the server identification information of the domain index server of the user's domain.

In a specific implementation, the determination unit 54 may determine the content distribution node that provides services for the user in any of the following ways:

method one

The determining unit 54 is configured to determine, among the content distribution nodes corresponding to the searched node identification information, the content distribution node closest to the user's location as the content distribution node that provides services for the user.

way two

The determining unit 54 includes a first determining subunit and a second determining subunit, wherein:

The first determination subunit is configured to respectively determine the distribution weight value of the content distribution node for each content distribution node corresponding to the node identification information found by the search unit 53;

The second determination subunit is configured to determine a content distribution node that provides services for the user among the content distribution nodes corresponding to the searched node identification information according to the distribution weight values determined by the first determination subunit.

Specifically, the first determination subunit includes an acquisition module and a determination module, wherein:

An acquisition module, configured to acquire parameter values of each node parameter of the content distribution node;

The determination module is configured to determine the distribution weight value of the content distribution node according to the parameter values of each node parameter and the weight factor of each node parameter acquired by the acquisition module.

As shown in FIG. 6 , it provides a schematic flow diagram of the implementation process of the method for determining the content distribution node on the global server side according to the embodiment of the present invention, including the following steps:

S61. The global index server receives the user's access request sent by the first domain index server, and the access request carries URL information of the webpage requested by the user;

S62. According to the website information carried in the user's access request, search for the server identification information of the second domain index server corresponding to the website information;

S63. Among the second domain index servers corresponding to the searched server identification information, determine the second domain index server that meets the preset condition;

S64. Send the access request to the determined second domain index server, instructing the second domain index server to determine a content distribution node that provides services for the user;

Specifically, in step S62, the server identification information of the second domain index server corresponding to the URL information carried in the user's access request can be searched according to the following process:

According to the URL information carried in the user's access request, in the corresponding relationship between the URL information of the web page and the server identification information of the second domain index server to which each content distribution node storing the web content of the web page belongs, search for the corresponding second domain index server. The server identification information of the second domain index server;

If found, the search process ends;

If not found, select the first URL aggregation level in descending order of URL aggregation levels;

Aggregating the URL information carried in the access request according to the selected URL aggregation level;

According to the aggregated URL information, in the corresponding relationship between the URL information of the webpage and the server identification information of the second domain index server to which each content distribution node that stores the webpage content of the webpage belongs, search for the first URL corresponding to the aggregated URL information The server identification information of the second domain index server;

If found, the search process ends; otherwise

According to the order of URL aggregation levels from low to high, select the next URL aggregation level, and return to the server that continues to aggregate URL information and search for the second domain index server corresponding to the aggregated URL information according to the aggregated URL information Operations that identify information.

Wherein, in step S64, when the second domain index server determines the content distribution node that provides services for the user, according to the URL information carried in the access request, the URL information of the webpage and each content distribution node that stores the webpage content of the webpage In the corresponding relationship between the node identification information, look up the node identification information of each content distribution node corresponding to the website information, and determine the distribution of the content distribution node for each content distribution node corresponding to the found node identification information. For the weight value, according to the determined distribution weight values, among the content distribution nodes corresponding to the found identification information of each node, the content distribution node that provides the service for the user is determined.

Preferably, the preset condition is that the aggregation level of the URL is the lowest.

As shown in FIG. 7, it is a schematic diagram of a possible structure of the global index server provided by the embodiment of the present invention, including:

The storage unit 71 is used to store the corresponding relationship between the URL information of the webpage and the server identification information of the second domain index server to which each content distribution node that stores the webpage content of the webpage belongs;

The receiving unit 72 is configured to receive the user's access request sent by the first domain index server, and the access request carries the URL information of the webpage that the user requests to visit;

The search unit 73 is configured to, according to the website information carried in the user's access request received by the receiving unit 72, the website information of the webpage stored in the storage unit 71 and the second domain to which each content distribution node that stores the webpage content of the webpage belongs In the corresponding relationship of the server identification information of the index server, search for the server identification information of the second domain index server corresponding to the URL information;

A determination unit 74, configured to determine, among the second domain index servers corresponding to the searched server identification information, a second domain index server that satisfies a preset condition;

The sending unit 75 is configured to send the access request to the second domain index server determined by the determining unit 75, and instruct the second domain index server to determine a content distribution node that provides services for the user, wherein the second domain server determines the content distribution node that provides services for the user In the case of a content distribution node, according to the URL information carried in the access request, in the corresponding relationship between the URL information of the webpage and the node identification information of each content distribution node storing the webpage content of the webpage, search for each content corresponding to the URL information For the node identification information of the distribution node, for each content distribution node corresponding to the found node identification information, respectively determine the distribution weight value of the content distribution node, and according to the determined distribution weight values, in each found node identification information Among the corresponding content distribution nodes, a content distribution node that provides services for the user is determined.

Specifically, the search unit 73 includes: a first search subunit, a selection subunit, an aggregation subunit, a second search subunit, and a second selection subunit, wherein:

The first search subunit is configured to, according to the website information carried in the user's access request, find out the correspondence between the website information of the webpage and the server identification information of the second domain index server to which each content distribution node storing the webpage content belongs. , look up the server identification information of the corresponding second domain index server;

The selection sub-unit is used to select the first URL aggregation level according to the order of the URL aggregation levels from low to high when the first search sub-unit does not find the server identification information of the corresponding second domain index server, and in the 2. When the search subunit does not find the server identification information of the corresponding second domain index server, select the next URL aggregation level in the order of the URL aggregation levels from low to high;

The aggregation subunit is used to aggregate the URL information carried in the access request according to the URL aggregation level selected by the selection subunit;

The second search subunit is used to, according to the URL information aggregated by the aggregation subunit, in the corresponding relationship between the URL information of the webpage and the server identification information of the second domain index server to which each content distribution node storing the webpage content belongs , look up the server identification information of the second domain index server corresponding to the aggregated URL information.

As shown in FIG. 8 , it is a schematic structural diagram of a possible system for determining a content distribution node provided by an embodiment of the present invention, including:

The first domain index server 81 is used to obtain the user's access request, which carries the website address information of the webpage that the user requests to visit; In the corresponding relationship between the node identification information of each content distribution node of the web content, search for the node identification information of each content distribution node corresponding to the website information; The determination rule is set to determine the content distribution node that provides services for the user; and when the content distribution node that provides services for the user is not determined, the obtained user's access request is sent to the global index server, and the access request Carry the URL information of the webpage that the user requests to visit;

The global index server 82 is configured to receive the user's access request sent by the first domain index server 81; search for the server identification information of the second domain index server corresponding to the URL information according to the URL information carried in the access request; Among the second domain index servers corresponding to the server identification information, determine the second domain index server that satisfies the preset condition; and send the access request to the determined second domain index server 83, instructing the second domain index server 83 to determine a content distribution node that provides services to said users;

The second domain index server 83 is used to determine the content distribution node that provides services for the user, wherein, when the second domain index server 83 determines the content distribution node that provides services for the user, according to the URL information carried in the access request, in the web page In the corresponding relationship between the website information and the node identification information of each content distribution node that stores the webpage content of the webpage, search for the node identification information of each content distribution node corresponding to the website information, and correspond to each node identification information found. determine the distribution weight value of the content distribution node respectively, and determine the content distribution node that provides services for the user among the content distribution nodes corresponding to the found identification information of each node according to the determined distribution weight values.

Specifically, according to the URL information carried in the user's access request, the global index server 82, in the corresponding relationship between the URL information of the webpage and the server identification information of the second domain index server to which each content distribution node storing the webpage content belongs, , to search for the server identification information of the corresponding second domain index server; if found, the search process ends; if not found, select the first URL aggregation level in the order of the URL aggregation levels from low to high; according to the selection According to the website aggregation level, the website information carried in the access request is aggregated; according to the aggregated website information, the website website information of the webpage and the second domain index server to which each content distribution node that stores the webpage content of the webpage belongs In the corresponding relationship of the server identification information, search for the server identification information of the second domain index server corresponding to the aggregated URL information; if found, the search process ends; otherwise, according to the order of the URL aggregation level from low to high, select to the next URL aggregation level, and return to continue performing the operations of aggregating the URL information and finding the server identification information of the second domain index server corresponding to the aggregated URL information according to the aggregated URL information.

In the method, device, and system for determining a content distribution node provided by the embodiments of the present invention, the domain index server first searches for and caches all content distribution sites that have cached the web page content corresponding to the web address information according to the obtained web address information carried in the user's access request. The node identification information of the node, and then according to the preset determination rules, determine the content distribution node that provides services for the user from the content distribution nodes corresponding to the found node identification information. In this way, because the domain index server follows the preset rules , determine the content distribution node that provides services to users from all the content distribution nodes that have cached the web page content corresponding to the URL information, instead of searching for the content distribution node from a CDN system corresponding to the URL information, so finally determine the The content distribution node that provides services for users is the best content distribution node, which effectively improves the processing efficiency of content distribution nodes when providing services for users.

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 equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (29)

1. A method for determining a content distribution node, comprising: The domain index server obtains the user's access request; and According to the URL information of the webpage requested by the user carried in the access request, search for the URL information in the corresponding relationship between the URL information of the webpage and the node identification information of each content distribution node storing the webpage content of the webpage Node identification information of each corresponding content distribution node; The domain index server determines the content distribution node that provides services for the user among the content distribution nodes corresponding to the searched node identification information, including: determining that the content distribution node closest to the user's location is the content that provides services for the user distribution node; or for the content distribution node corresponding to each node identification information found, respectively determine the distribution weight value of the content distribution node; according to the determined distribution weight values, the content corresponding to each node identification information found Among the distribution nodes, a content distribution node that provides services for the user is determined. 2. The method of claim 1, further comprising: The domain index server sends the determined node identification information of the content distribution node to the user according to the user identification information included in the access request, and instructs the user to select from the content distribution node corresponding to the received node identification information Gets the webpage content of the webpage that requested access. 3. The method according to claim 1, wherein obtaining the user's access request specifically comprises: Receive access requests submitted by users in this domain through web browsers. 4. The method of claim 3, further comprising: If the domain index server does not find the node identification information of the content distribution node corresponding to the URL information in the corresponding relationship, the obtained access request is sent to the global index server. 5. The method according to claim 4, wherein the obtained access request is sent to a global index server, specifically comprising: After replacing the user identification information included in the access request with the server identification information of the domain index server, send it to the global index server. 6. The method of claim 1, further comprising: The domain index server receives the node identification information of the content distribution node sent by other domain index servers; Sending the received node identification information of the content distribution node to the user, instructing the user to obtain the web page content of the requested web page from the content distribution node corresponding to the received node identification information. 7. The method of claim 1, further comprising: The domain index server receives the node identification information of the content distribution node sent by other domain index servers; According to the received node identification information, the stored corresponding relationship between the URL information of the web page and the node identification information of each content distribution node storing the content of the web page is updated. 8. The method according to claim 1 or 3, wherein the domain index server further includes: before searching the node identification information of each content distribution node corresponding to the website information: When the domain index server detects that its own load exceeds a preset threshold, it sends the obtained access request to the global index server. 9. The method according to claim 1, wherein obtaining the user's access request specifically comprises: Receive the user's access request sent by the global index server. 10. The method of claim 9, further comprising: Send the determined node identification information of the content distribution node to the domain index server of the user's domain according to the server identification information of the domain index server of the user's domain included in the access request. 11. The method according to claim 1, wherein determining the distribution weight value of the content distribution node specifically comprises: Acquiring parameter values of each node parameter of the content distribution node; The distribution weight value of the content distribution node is determined according to the obtained parameter value of each node parameter and the weight factor of each node parameter. 12. The method of claim 11, wherein node parameters include evaluation parameters, quality parameter values and link parameters. 13. A domain index server, comprising: The storage unit is used for storing the corresponding relationship between the URL information of the webpage and the node identification information of each content distribution node storing the webpage content of the webpage; an obtaining unit, configured to obtain a user's access request; The search unit is configured to use the website address information of the webpage that the user requests to visit carried in the access request obtained by the obtaining unit, the website address information of the webpage stored in the storage unit, and the information of each content distribution node that stores the webpage content of the webpage In the corresponding relationship between the node identification information, look up the node identification information of each content distribution node corresponding to the website information; The determination unit is configured to determine, among the content distribution nodes corresponding to the identification information of each node found by the search unit, according to a preset determination rule, a content distribution node that provides services for the user, wherein: The determining unit is specifically configured to determine, among the content distribution nodes corresponding to the found identification information of each node, that the content distribution node closest to the user's location is the content distribution node that provides services for the user; or The determining unit includes a first determining subunit and a second determining subunit, wherein: The first determination subunit is configured to determine the distribution weight value of the content distribution node for each content distribution node corresponding to the node identification information found by the search unit; The second determination subunit is configured to determine the content that provides services for the user in the content distribution nodes corresponding to the searched node identification information according to the distribution weight values determined by the first determination subunit distribution node. 14. The domain index server according to claim 13, further comprising: The first sending unit is configured to, according to the user identification information contained in the access request obtained by the obtaining unit, send the determined node identification information of the content distribution node to the user, and instruct the user to obtain the information from the received node. The web page content of the web page requested to be accessed is obtained from the content distribution node corresponding to the identification information. 15. The domain index server of claim 13, wherein The obtaining unit is specifically configured to receive an access request submitted by a user in the domain through a web browser. 16. The domain index server according to claim 15, further comprising: The second sending unit is configured to, if the search unit does not find the node identification information of the content distribution node corresponding to the website information in the correspondence stored in the storage unit, obtain the access obtained by the unit The request is sent to the global index server. 17. The domain index server of claim 16, wherein The second sending unit is specifically configured to replace the user identification information contained in the access request with the server identification information of the domain index server, and then send it to the global index server. 18. The domain index server according to claim 14, further comprising a first receiving unit, wherein: The first receiving unit is configured to receive node identification information of content distribution nodes sent by other domain servers; The first sending unit is further configured to send the node identification information of the content distribution node received by the first receiving unit to the user, and indicate to the user the content distribution node corresponding to the received node identification information Fetch the web page content of the web page requested to be accessed. 19. The domain index server according to claim 13, further comprising a second receiving unit, wherein: The second receiving unit is configured to receive node identification information of content distribution nodes sent by other domain index servers; An updating unit, configured to update the stored correspondence between the URL information of the webpage and the node identification information of each content distribution node storing the webpage content of the webpage according to the node identification information received by the second receiving unit . 20. The domain index server according to claim 13 or 15, further comprising: The third sending unit is configured to, if the domain index server detects that its own load exceeds a preset threshold before searching for the node identification information of each content distribution node corresponding to the website information, the obtained The access request is sent to the global index server. 21. The domain index server of claim 13, wherein The obtaining unit is specifically configured to receive the user's access request sent by the global index server. 22. The domain index server according to claim 21, further comprising: The fourth sending unit is configured to send the determined node identification information of the content distribution node to the domain index server of the user's domain according to the server identification information of the domain index server of the user's domain contained in the access request . 23. The domain index server according to claim 13, wherein the first determination subunit comprises an acquisition module and a determination module, wherein: The obtaining module is used to obtain the parameter value of each node parameter of the content distribution node; The determination module is configured to determine the distribution weight value of the content distribution node according to the parameter value of each node parameter and the weight factor of each node parameter acquired by the acquisition module. 24. A method for determining a content distribution node, comprising: The global index server receives the access request sent by the first domain index server; and According to the URL information of the webpage requested by the user carried in the access request, in the corresponding relationship between the URL information of the webpage and the server identification information of the second domain index server to which each content distribution node storing the webpage content belongs, search The server identification information of the second domain index server corresponding to the URL information; The global index server determines a second domain index server that satisfies a preset condition among the second domain index servers corresponding to the identified server identification information; and Sending the access request to the determined second domain index server, instructing the second domain index server to determine a content distribution node that provides services for the user. 25. The method according to claim 24, wherein, according to the URL information of the webpage requested by the user carried in the access request, the URL information of the webpage and each content distribution node that stores the webpage content of the webpage belong to In the corresponding relationship between the server identification information of the second domain index server, search for the server identification information of the second domain index server corresponding to the URL information, specifically including: According to the URL information carried in the user's access request, in the corresponding relationship between the URL information of the web page and the server identification information of the second domain index server to which each content distribution node storing the web content of the web page belongs, search for the corresponding second domain index server. The server identification information of the second domain index server; If found, the search process ends; If not found, select the first URL aggregation level in descending order of URL aggregation levels; Aggregating the URL information carried in the access request according to the selected URL aggregation level; According to the aggregated URL information, in the corresponding relationship between the URL information of the webpage and the server identification information of the second domain index server to which each content distribution node that stores the webpage content of the webpage belongs, search for the first URL corresponding to the aggregated URL information The server identification information of the second domain index server; If found, the search process ends; otherwise According to the order of URL aggregation levels from low to high, select the next URL aggregation level, and return to the server that continues to aggregate URL information and search for the second domain index server corresponding to the aggregated URL information according to the aggregated URL information Operations that identify information. 26. A global index server, comprising: The storage unit is used to store the corresponding relationship between the URL information of the webpage and the server identification information of the second domain index server to which each content distribution node that stores the webpage content of the webpage belongs; The receiving unit is configured to receive the user's access request sent by the first domain index server, the access request carrying the URL information of the webpage the user requests to visit; The search unit is configured to, according to the website information carried in the user's access request received by the receiving unit, store the website information of the webpage stored in the storage unit and the second domain index to which each content distribution node that stores the webpage content of the webpage belongs to In the corresponding relationship of the server identification information of the server, search for the server identification information of the second domain index server corresponding to the URL information; A determining unit, configured to determine, among the second domain index servers corresponding to the searched server identification information, a second domain index server that satisfies a preset condition; A sending unit, configured to send the access request to the second domain index server determined by the determining unit, and instruct the second domain index server to determine a content distribution node that provides services for the user. 27. The global index server according to claim 26, wherein the search unit comprises: The first search subunit is configured to, according to the URL information carried in the user's access request, compare the URL information of the webpage with the server identification information of the second domain index server to which each content distribution node storing the webpage content belongs. In the corresponding relationship, look up the server identification information of the corresponding second domain index server; The selection subunit is used to select the first URL aggregation level according to the order of the URL aggregation levels from low to high when the first search subunit does not find the server identification information of the corresponding second domain index server, and When the second search subunit does not find the server identification information of the corresponding second domain index server, select the next URL aggregation level in the order of the URL aggregation levels from low to high; an aggregation subunit, configured to aggregate the URL information carried in the access request according to the URL aggregation level selected by the selection subunit; The second search subunit is used to correspond the URL information of the webpage with the server identification information of the second domain index server to which each content distribution node that stores the webpage content belongs to according to the URL information aggregated by the aggregation subunit In the relationship, the server identification information of the second domain index server corresponding to the aggregated URL information is searched. 28. A system for determining a content distribution node, comprising: The first domain index server is used to obtain the user's access request, and the access request carries the URL information of the web page that the user requests to visit; according to the URL information carried in the access request, the URL information of the web page and the web page are stored In the corresponding relationship between the node identification information of each content distribution node of the webpage content, search for the node identification information of each content distribution node corresponding to the website information; in the found content distribution node corresponding to each node identification information, According to a preset determination rule, determine a content distribution node that provides services for the user; and when no content distribution node that provides services for the user is determined, send the obtained user's access request to the global index server , the access request carries URL information of the webpage requested by the user; The global index server is configured to receive an access request from a user sent by the first domain index server; In the corresponding relationship between the server identification information of the second domain index server to which the distribution node belongs, search for the server identification information of the second domain index server corresponding to the URL information; in the second domain index server corresponding to the searched server identification information , determine a second domain index server that satisfies a preset condition; and send the access request to the determined second domain index server, instructing the second domain index server to determine a content distribution node that provides services for the user ; The second domain index server is configured to determine a content distribution node that provides services to the user, wherein, when the second domain index server determines the content distribution node that provides services to the user, according to the URL information carried in the access request , in the corresponding relationship between the URL information of the webpage and the node identification information of each content distribution node storing the webpage content of the webpage, searching for the node identification information of each content distribution node corresponding to the URL information, and for each found The content distribution nodes corresponding to the node identification information respectively determine the distribution weight value of the content distribution node, and according to the determined distribution weight values, among the content distribution nodes corresponding to the found node identification information, determine the user as the user A content distribution node that provides services. 29. The system of claim 28, wherein: The global index server is specifically configured to, according to the URL information carried in the user's access request, combine the URL information of the webpage with the server identification information of the second domain index server to which each content distribution node that stores the webpage content of the webpage belongs In the corresponding relationship, search for the server identification information of the corresponding second domain index server; if found, the search process ends; if not found, select the first URL aggregation according to the order of URL aggregation levels from low to high layer; according to the selected URL aggregation level, the URL information carried in the access request is aggregated; according to the aggregated URL information, the URL information of the webpage and the first content distribution node that stores the webpage content of the webpage belong to In the corresponding relationship of the server identification information of the second domain index server, search for the server identification information of the second domain index server corresponding to the aggregated URL information; if found, the search process ends; otherwise, according to the URL aggregation level from low to high select the next URL aggregation level, and return to continue the operation of aggregating the URL information and searching the server identification information of the second domain index server corresponding to the aggregated URL information according to the aggregated URL information.