| Nowadays, a web application that based on the “client-server-database” frameworkis not sufficient to support the ever increasing request load and highly skewed datarequests. Scalability and availability can be provided by Web caching so that it has beenconsidered as one of the effective solutions to improve the performance and efficiency ofthe system. The research about Distributed Caching System has begun from thebeginning of the1990s and some of the research achievements have been applied topopular webs already.The Balanced Partition Scheme (BPS) is proposed to make sure that the distributedcaching system can work well all the time even when there is a significant increase inrequests and new nodes can be located to hot spots exactly. In the BPS, the hash ring ofthe caching system is equally sliced. Each node in the server pool is assigned a certainnumber of tokens based on its capacity. One approach which addresses the problem ofmaintaining system’s availability in dynamic situation has been come out in this paper.The data should be fetched by a certain number of nodes along the path which therequests have been transmitted along. A water supply information management systembased on B/S structure is described in this paper. The lose rate of the flow meters can beinquired within the system. But users have to wait for a long time since the query iscomplicated. To improve the performance of the system, a distributed caching systemwith pre-processing scheme has been applied to it.The results of simulation based on the Memcached system indicated that BalancedPartition Scheme achieved a better load balanced and redundant storage worked well indynamic situation. Besides, the applicability of distributed caching system in the watersupply information management system has been verified in the simulation. |
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