Usenet is the name of a worldwide network of servers for group communication between people from 1979 and onwards, it has seen a fast growth in the amount of data transported, which has been a break on bandwidth and storage. This paper describes the history of Cache Strategies used for Usenet in a growth viewpoint and its different issues. Usenet volume has been growing exponentially for many years; this growth increasing demands on the cache strategies of a net news server for disk space. We wanted to find a best strategy that could easily handle to meet future growth of system administration effort. In this paper we present a high performance cache server for Usenet News that helps to conserve network bandwidth and disk storage. After a systematic comparison of existing news database formats we designed NEWSCACHE to remedy Usenet News bottlenecks. We present an experimental comparison of different cache strategies as well as an evaluation of the use of NEWSCACHE as a news server.
