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MUTUAL BACKUP METHOD AND ROUTING METHOD FOR A PLURALITY OF SERVERS
MUTUAL BACKUP METHOD AND ROUTING METHOD FOR A PLURALITY OF SERVERS
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机译:多个服务器的互备份方法和路由方法
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摘要
PROBLEM TO BE SOLVED: To provide the mutual backup method for a plurality of servers by which the client server system with high reliability is realized at a low cost. ;SOLUTION: When a client requests update of data to a server A (access server), the server A inquires about a time stamp stored in all other servers B, C. Since the time stamp of the server A is To a time stamp reply from the servers R, C to the server A is To, the server A confirms it that data stored in the server A are not old. Moreover, a time T1 at this point of time is stored in the server A as the time stamp for updated data this time, and the server A makes data update request this time to the other servers B, C and distributes the time stamp T1 to them. The other servers B, C update the data and the time stamp similarly in the case of the server A. The server A receives data update reply from the other servers B, C and the data update reply is returned to the client.;COPYRIGHT: (C)1998,JPO
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机译:解决的问题:提供一种用于多个服务器的相互备份方法,通过该方法可以以低成本实现具有高可靠性的客户端服务器系统。 ;解决方案:当客户端向服务器A(访问服务器)请求更新数据时,服务器A查询存储在所有其他服务器B,C中的时间戳。由于服务器A的时间戳为T o Sub>从服务器R,C到服务器A的时间戳回复是T o Sub>,服务器A确认存储在服务器A中的数据不旧。另外,将此时的时间T 1 Sub>作为这次更新数据的时间戳存储在服务器A中,服务器A这次向其他服务器B发出数据更新请求, C并将时间戳T 1 Sub>分配给它们。在服务器A的情况下,其他服务器B,C也会更新数据和时间戳。服务器A从其他服务器B,C接收数据更新回复,并且数据更新回复返回给客户端。日本特许厅(C)1998
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