| 摘要 |
<p>A method of maintaining mutual consistency between copies of data stored at nodes in a network, the nodes comprising a server node, and a number of client nodes at remote locations, such as laptop computers linked by cellular telephone connections, the nodes being connected intermittently. Following a reconnection between the remote client node and another of the nodes, timestamp information on objects cached at the other node, is sent to the remote client node. At the remote client node, the timestamp information is compared with corresponding information relating to the local copy, to determine if each of the cached objects is more up to date than the local copy. The cached objects are updated based on the local copy, according to the result of the comparison. This peer to peer resynchronisation means that the server need not monitor and control the process, so the system is more easily scaled up to handle more clients. <IMAGE></p> |
