An Efficient Caching scheme to maintain consistency in Hybrid P2P system

The paper aims on how efficiently the performance of cache memory can be maintained in disturbed network and also in P2P networks. A Technique of distributed cache invalidation mechanism (DCIM), it is client-based cache consistency scheme is implemented on top of a previously existing architecture, namely COACS, here in COACS a special nodes cache the queries and the addresses of the nodes that store the responses to these queries. DCIM uses a pull-based algorithm that implements adaptive time to live (TTL), piggybacking, and perfecting, and provides near strong consistency capabilities. Cached data items are assigned adaptive TTL values that correspond to their update rates at the data source, where items with expired TTL values are grouped in validation requests to the data source to refresh them, whereas unexpired ones but with high request rates are perfected from the