Session keeping method and load balance apparatus

Abstract

The invention discloses a method for session persistence. The method comprises: a receiving server of load equalizing equipment sends a response message to a client, cookie information in the response message is replaced by the cookie information set by the load equalizing equipment, the corresponding relations among the cookie information set by the load equalizing equipment, the replaced cookie information and the server are recorded, and the response message after replacement is sent to the client; the load equalizing equipment receives the request message sent by the client later, when the request message carries the cookie information set by the load equalizing equipment, according to the corresponding relation, the cookie information which is set by the server and is corresponding to the cookie information in the request message as well as the corresponding server are searched, the cookie information in the request message is reverted to the searched cookie information, and the reverted request message is sent to the server searched. By using the method of the invention, not only is the setting of the cookie information by the server not relied on, but also the length of the cookie information is not increased.

Description

technical field [0001] The invention relates to session keeping technology in communication, in particular to a session keeping method and a load balancing device. Background technique [0002] The server load balancing device refers to the device that is installed at the front end of a group of servers with the same or similar functions, and reasonably distributes the traffic to the server group, so that the load balance among the servers is realized. figure 1 A schematic diagram of a network structure of a typical application of an existing server load balancing device is shown. The network structure includes clients, load balancing devices (server controllers) and server farms, figure 1 A server C in the server farm is shown in . [0003] Session persistence is an important function of load balancing devices. Through session persistence, it is ensured that a series of associated sessions are allocated to one server after load balancing, and will not be allocated to dif...

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Problems solved by technology

[0013] It can be seen that using the active method to achieve session persistence does not depend on the cookie settings of the server, but after the load balancing device inserts its own information into the cookie information set by the server, the length of the cookie information is increased. If the length of the cookie information exceeds the client's If the end browser restricts the length of cookie information, it will cause the cookie information to become invalid, thus making the session fail

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