CN1863202B - Method for improving load balance apparatus and server processing performance - Google Patents

Abstract

The invention provides a method for improving processing performance of load equalizing device and server, mainly comprising: making interaction of various messages between the load equalizing device and server, and according to the interactive messages, they make corresponding configuration processing. And it can better dispose new servers and better use resources of the load equalizing device and improve safety of the load equalizing device and other processing functions.

Description

A method to improve the processing performance of load balancing equipment and servers

technical field

The invention relates to the field of network communication, in particular to a method for improving the processing performance of a load balancing device and a server. the

Background technique

In actual network applications, when the performance of one server is not enough to support the application, multiple servers are required to provide external services together. At this time, load balancing technology needs to be used. the

Load balancing is a collection of servers composed of multiple servers in a symmetrical manner. Each server has an equivalent status and can provide external services independently without the assistance of other servers. Through a certain load sharing technology, the requests sent from the outside are evenly distributed to a certain server in the symmetrical structure, and the server that receives the request independently responds to the client's request. the

A schematic diagram of a load balancing network is shown in Figure 1 . In the networking shown in Figure 1, multiple servers form a server group. When a user initiates an access, the user's access request will first arrive at the load balancing device, and the load balancing device will distribute the request to the corresponding server. General load balancing equipment does not analyze the application layer, but directly performs sharing processing based on the information of the network layer. the

In the network shown in Figure 1, when a new server device needs to be added to the server group, the configuration for the new server needs to be added in the load balancing device, so that subsequent applications can be gradually distributed to the new server . the

The disadvantage of the above-mentioned existing load balancing equipment is that new servers cannot be conveniently added to the existing load balancing network. In practical applications, the performance of various servers may be different. For example, some servers can handle 100 requests, while some servers can handle 300 requests or more. When a new server device needs to be added to the existing load balancing network, the configuration on the load balancing device needs to be changed. For example, a command is added to the load balancing device to indicate the processing capability of the new server. At the same time, the above-mentioned existing load balancing equipment cannot make full use of existing resources, and the security is poor. the

Contents of the invention

The purpose of the present invention is to provide a method for improving the processing performance of a load balancing device and a server, so that the processing performance of the load balancing device can be improved. the

The purpose of the present invention is achieved by the following technical solutions:

A method of improving load balancing device and server processing performance, comprising:

The initial configuration information of the server is exchanged between the load balancing device and the server, and the load balancing device and the server perform corresponding configuration processing according to the exchanged initial configuration information of the server;

When a new server needs to be added, the new server sends information carrying the server's capability data to the load balancing device;

After the load balancing device receives the information sent by the server, it saves the capability data of the server carried in the information in its internal data table, and returns the response information carrying the external IP address of the load balancing device to the server. The server uses the external IP address as the IP address in the data area of the message sent to the load balancing device. the

The methods described specifically include:

The interaction of various information between the load balancing device and the server is based on the Transmission Control Protocol TCP or the User Datagram Protocol UDP or the Stream Control Transmission Protocol SCTP. the

The methods described specifically include:

Various information is exchanged between the load balancing device and the server through a transfer device, and the transfer device includes an information collection device or a proxy device. the

After the capability data is processed, a response message is returned to the server. the

The methods described specifically include:

The connection between the load balancing device and the server is maintained through information interaction between the load balancing device and the server;

Through information exchange between the load balancing device and the server, the initial configuration information of the server on the load balancing device is canceled. the

The methods described specifically include:

The load balancing device and the server process the session entries on the load balancing device through information exchange. the

The methods described specifically include:

When the server needs to notify the load balancing device to keep or delete the session entry, the server sends the corresponding request information to the load balancing device;

The load balancing device returns response information to the server after performing corresponding processes of maintaining or deleting session entries according to the received request information. the

When the server needs to notify the load balancing device to keep or delete the session entry, the server sends the corresponding request information to the load balancing device, which specifically includes:

If the user successfully registers on the server, the server sends a request message to the load balancing device to keep the user's session entry, otherwise, sends a request message to delete the user's session entry;

When various useless session entries are generated on the load balancing device, the server sends request information to the load balancing device to delete the useless session entries. the

It can be seen from the above-mentioned technical solution provided by the present invention that the present invention can better deploy new servers and make better use of Processing functions such as load balancing device resources, improving the security of load balancing devices, etc. the

Description of drawings

Figure 1 is a schematic diagram of a load balancing network;

Fig. 2 is the processing flowchart of the method described in this method;

Figure 3 is a schematic diagram of the interaction between the load balancing device and the server for registration messages and registration response messages;

Fig. 4 is a schematic diagram of the internal IP address and the external IP address of the load balancing device;

Figure 5 is a schematic diagram of the load balancing device replacing the IP address of the server in the IP header of the message sent by the server with an external IP address;

Figure 6 is a schematic diagram of the interaction between the load balancing device and the server for keeping alive messages, logout messages and session entry processing messages;

Fig. 7 is the schematic diagram that SIP user registers on SIP server;

FIG. 8 is a schematic diagram of a transfer between a server and a load balancing device through a transfer device. the

Detailed ways

The present invention provides a method for improving the processing performance of a load balancing device and a server. The core of the present invention is: the interaction of various messages between the load balancing device and the server based on a protocol mechanism. According to the interactive messages, the load balancing The device and the server perform corresponding configuration processing. the

Describe the present invention in detail below in conjunction with accompanying drawing, the processing flow of the method described in this method is as shown in Figure 2, comprises the following steps:

Step 2-1: The load balancing device and the server exchange registration messages and registration corresponding messages based on a protocol mechanism, and establish connections with each other. the

The present invention at first establishes a kind of agreement mechanism between load balancing device and server, and this agreement can be based on other agreements such as TCP (Transmission Control Protocol), UDP (User Datagram Protocol) or SCTP (Stream Control Transmission Protocol), if server A certain protocol has been adopted with the load balancing device, and this protocol can also be used as a part of the protocol already adopted. the

After the protocol mechanism is established between the load balancing device and the server, mutual authentication operations can be performed first, and information can then be exchanged with each other after the authentication is passed. The authentication mechanism may adopt a mechanism similar to CHAP (Challenge Handshake Authentication Protocol) or PAP (Password Authentication Protocol), or other authentication mechanisms. the

Various information can be exchanged between the load balancing device and the server through the established protocol mechanism. When a new server needs to be added, the load balancing device and the new server firstly exchange registration messages and registration response messages. The schematic diagram of the interaction process is shown in FIG. 3 . the

First, the server sends a registration message to the load balancing device, and the registration message carries the following information:

1. Message type, which is a registration message;

2. Capability data of this server;

3. The name of the server, this information is optional. the

When the load balancing device receives the registration message sent by the server, it saves the server's capability data carried in the registration message and returns a registration response message to the server, which carries the following information:

1. Message type, which is a response message;

2. The external IP address of the load balancing device, this information is optional;

3. Other information that simplifies server configuration, this information is optional. the

The load balancing device knows the performance data of the new server according to the received registration message, so the load balancing device does not need to perform additional configuration work on the new server. the

In practical applications, a data table can be maintained in the load balancing device, and the performance data of each server, the current processing value, etc. are recorded in the table. This table is a basis for the load balancing device to distribute traffic. the

The registration message and the registration response message exchanged between the load balancing device and the server can be divided into multiple messages for transmission. the

Generally, the load balancing device has two internal and external IP addresses, the internal IP address is visible to the server, and the external IP address is visible to the user. The server can be connected to the internal IP address of the load balancing device without configuring special routing information. Based on factors such as routing, the server does not connect to the external IP address of the load balancing device. A schematic diagram of an internal IP address and an external IP address of a load balancing device is shown in FIG. 4 . the

Below we introduce the function of the external IP address information of the load balancing device carried in the registration response message. the

Some protocol messages sent by the server to the load balancing device, such as SIP (Session Initiation Protocol), H.323 and other protocol messages, need to carry the IP address information of the machine in the message data. Because the load balancing device generally does not modify the content of the message sent by the server, but only modifies the IP header of the message, replacing the IP address of the server in the IP header of the message with the external IP address of the load balancing device, and the packet The IP address carried in the data area is not modified, and then the load balancing device forwards the replaced message to the user. A schematic diagram of the above replacement process is shown in FIG. 5 . the

When the user receives the message forwarded by the above load balancing device, the user will see two different IP addresses, one is the IP address in the IP header, and the other is the IP address in the data area. Such a situation may lead to errors in subsequent processes. the

In order to solve the above problems, after the server receives the external IP address information of the load balancing device carried in the above registration response message, the server can directly fill in the IP address in the data area as the load balance device when sending subsequent messages. The external IP address of the balance device. Therefore, the last message seen by the user will only carry one IP address. the

In addition to carrying the external IP address of the load balancing device, the above registration response message may also carry some other information to the server. For example, some attribute information that the server should have in common. The specific information carried is related to the actual application environment of the server. the

After the registration message and the registration response message are successfully exchanged between the load balancing device and the server, a connection is established between the load balancing device and the server. the

Step 2-2: After the connection is established between the load balancing device and the server, the interaction between the keep-alive message, the logout message and the session entry processing message is performed based on the protocol mechanism. the

After the connection between the load balancing device and the server is successfully established, various other information can be exchanged between the load balancing device and the server through the established protocol mechanism. For example, as shown in FIG. 6 , the interaction between the keep-alive message and the keep-alive response message, the logout message and the logout response message, the session entry processing request message and the session entry processing response message is performed. the

The keep-alive message and the keep-alive response message are transmitted between the load balancing device and the server at regular intervals, so as to maintain the connection between the load balancing device and the server. the

The server sends a logout message to the load balancing device, and the load balancing device performs corresponding operations and returns a logout response message. Then, the registration of the server on the load balancing device is canceled, and the connection between the load balancing device and the server is disconnected. connect. the

Below we introduce the functions of the above-mentioned session entry processing request packets and session entry processing response packets. the

In order to ensure that multiple packets of the same user can be processed on the same server, the load balancing device needs to generate a session table for each user. Since the resources of the session table are limited, when a session table has expired, the load balancing device will perform aging and other processing on the session table to release the resources occupied by the session table. the

The following uses the SIP protocol as an example to illustrate the above situation. Under normal circumstances, a SIP user needs to be successfully registered on the server before being called or calling. When a SIP user registers successfully, the session table for the user will always exist on the load balancing device until the user logs out or disconnects. the

When a SIP user fails to register successfully on the server. The session table for this user does not need to be kept for a long time on the load balancing device. At the same time, when a network attack occurs, there will be many session entries that do not need to be kept for a long time on the load balancing device. When the number of such entries reaches a large number, a large amount of resources will be occupied, and the load balancing device will not have enough resources to create session entries for normal users, thus causing normal services to be denied. Existing load balancing devices cannot distinguish the various session entries mentioned above. A schematic diagram of a SIP user registering on a SIP server is shown in FIG. 7 . the

In order to solve the above problems, the present invention uses the protocol mechanism established between the load balancing device and the server to perform interaction between the session entry processing request message and the session entry processing response message between the load balancing device and the server. the

When the server needs to notify the load balancing device to keep or delete a certain session entry, the server sends a corresponding session entry processing request message to the load balancing device. The load balancing device processes the request message according to the received session entry, and returns a session entry processing response message to the server after correspondingly maintaining or deleting a certain session entry. the

For example, when the server needs to notify the load balancing device to keep a certain session entry, the session entry processing request message sent by the server to the load balancing device will carry the following information:

1. Message type, which is to keep a specific session entry;

2. Specifically mark the information of the session entry, such as source, destination IP address/port, etc.;

3. The time for which the session entry needs to be kept. the

When the load balancing device receives the session entry processing request message, it will perform the corresponding process of maintaining the specific session entry, and then return a session entry processing response message, which will carry the following information:

1. Packet type, which is a response to the hold session entry.

2. The response result is the response success or failure. the

Similarly, when the server needs to notify the load balancing device to delete a certain session entry, it also sends a corresponding session entry processing request message to the load balancing device. the

The interaction between the load balancing device and the server through the above session entry processing request packets and session entry processing response packets can effectively utilize the resources of the load balancing device and increase the security of the load balancing network. the

In practical applications, there may be no direct interaction between the server and the load balancing device, but a transfer through a third party, for example, through a transfer device. A schematic diagram of the transfer between the server and the load balancing device through the transfer device is shown in FIG. 8 . the

The transit device can be a centralized information collection device, and other devices get information from this information collection device, and the load balancing device and server interact with the device respectively. For example, the server writes data (such as server performance indicators, etc.) to the device, and the load balancing device reads the data. the

The transit device can also be a kind of proxy device, that is, the function of proxying the load balancing device and the server respectively. For the load balancing device, the proxy device is the server; and for the server, the proxy device is the load balancing device. the

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (7)

1. A method for improving load balancing equipment and server processing performance, characterized in that, comprising: The server initial configuration information is exchanged between the load balancing device and the server, and the load balancing device and the server perform corresponding configuration processing according to the exchanged server initial configuration information; When a new server needs to be added, the new server sends information carrying the server's capability data to the load balancing device; After the load balancing device receives the information sent by the server, it saves the capability data of the server carried in the information in its internal data table, and returns the response information carrying the external IP address of the load balancing device to the server. The server uses the external IP address as the IP address in the data area of the message sent to the load balancing device. 2. the method for improving load balancing equipment and server processing performance according to claim 1, is characterized in that, described method specifically comprises: The interaction of various information between the load balancing device and the server is based on the Transmission Control Protocol TCP or the User Datagram Protocol UDP or the Stream Control Transmission Protocol SCTP. 3. the method for improving load balancing equipment and server processing performance according to claim 1, is characterized in that, described method specifically comprises: The load balancing device and the server exchange various information through the transfer device, and the transfer device includes information collection device or proxy device; After the capability data is processed, a response message is returned to the server. 4. according to claim 1,2 or the method for improving load balancing equipment and server processing performance described in claim 3, it is characterized in that, described method specifically comprises: The connection between the load balancing device and the server is maintained through information exchange between the load balancing device and the server; Through information interaction between the load balancing device and the server, the initial configuration information of the server on the load balancing device is canceled. 5. according to claim 1,2 or 3 described method for improving load balancing equipment and server processing performance, it is characterized in that, described method specifically comprises: The load balancing device and the server process the session entries on the load balancing device through information exchange. 6. the method for improving load balancing equipment and server processing performance according to claim 5, is characterized in that, described method specifically comprises: When the server needs to notify the load balancing device to keep or delete the session entry, the server sends the corresponding request information to the load balancing device; The load balancing device returns response information to the server after performing corresponding processes of maintaining or deleting session entries according to the received request information. 7. The method for improving the processing performance of the load balancing device and server according to claim 6, characterized in that, when the server needs to notify the load balancing device to keep or delete the session entry, the server sends a corresponding message to the load balancing device The requested information specifically includes: If the user successfully registers on the server, the server sends a request message to the load balancing device to keep the user's session entry, otherwise, sends a request message to delete the user's session entry; When various useless session entries are generated on the load balancing device, the server sends request information to the load balancing device to delete the useless session entries. the

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