| 摘要 |
A load-balancing device having a specification-information insertion unit, a specification-information detection unit, and a destination determination unit. When a response message does not contain specification information specifying a destination server, the specification-information insertion unit detects the source server of the response message as the destination server, and inserts into the response message specification information specifying the destination server. A client stores specification information specifying a destination server, and inserts the specification information in a request message when it is necessary to guarantee the uniqueness. When the load-balancing device receives a request message from the client, the specification-information detection unit detects whether or not specification information is inserted in the request message. When specification information is inserted in the request message, the destination determination unit determines the destination server on the basis of the second specification-information inserted in the request message, and sends the request message to the destination server.
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