| 摘要 |
A system and a method for distributing load based on dynamic hashing to improve caching effect are provided to guarantee connectivity between a user and a server, and improve the caching effect by using ingenious load distribution, and changing a hashing function in addition, removal, and overload of the server. A hashing value extractor(420) calculates a hash value from information by a user request. A hashing table(430) moves the hashing value to change a server allocated when the server is added, removed, failed, or overloaded. A hashing value movement information table(440) stores contextual information, such as hashing value moving time, session recording time, and overload state information for the hashing value, capable of moving the hashing value. A session table(450) stores session information for the user request for a predetermined time. A load distribution controlling and failure monitoring unit(410) includes a function for excluding the server from candidates when a failure occurs in the server by periodically checking the state of the servers.
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