I/O Performance of Scientific-Parallel Applications under PAFS

In this paper we present the behavior of PAFS in a scientific environment where big parallel applications are run. PAFS is a parallel/distributed file system with a cooperative cache that avoids the coherence problem while it continues to be highly scalable and achieves very good performance. The results presented in this paper have been obtained through simulation using the CHARISMA trace files and have been compared with other cooperative algorithms. Keywords Input/Output, Parallel/Distributed File System, Cooperative Cache, Cache Coherence, PAFS, xFS, CHARISMA. 1 Introduction In recent years, a lot of work has been devoted to parallel I/O and parallel/distributed file systems. This work has produced many different file systems along with as many different caching policies. A common exponent in most of these file systems is the idea of cooperation between nodes in order to achieve a better system performance. A good example is the idea of cooperative caches. In a cooperative cache ..