并行文件系统PFS的设计与分析

DESIGN AND ANALYSIS OF THE PARALLEL FILE SYSTEM, PFS

并行计算机高速处理能力与低速Ｉ／Ｏ设备之间的矛盾目前已成为并行计算机系统中的主要问题之一，因此必须研制高性能的并行文件系统．。本文介绍的ＰＦＳ是为“八六三计划”中“曙光二号”并行计算机设计的并行文件系统，该ＰＦＳ分散Ｉ／Ｏ设备的管理到多个处理结点，使文件能交叉地分布在不同Ｉ／Ｏ结点所控制的物理设备上，以实现最大程度的并行访问。本文阐述了ＰＦＳ的基本设计、实现方法及其性能的粗略分析。

At present, the contradictory between the high speed process ability and the low speed I/O devices has become one of the main problems in multicomputers. So it is necessary to develop parallel file system of high performance. PFS is a parallel file system designed for a multicomputer, one of the 863-plans. Its goal is to decentralize the management of I/O devices into multiple process nodes so that files can be distributed into different physical devices controlled by different process nodes, and accessed as parallel as possible. This paper states the basic design, implementation methods and approximate performance analysis about PFS.