Abstract: This paper analyzes the use of parallel I/O in MPI. To achieve high I/O performance with MPI, users use collective I/O function together with noncontiguous accesses. To improve the performance of collective I/O, the I/O four-levels access pattern is used.

摘要： 分析了在MPI中并行I/O的使用，利用collective I/O操作辅之以非连续访问方法，可以获得较高的执行性能，最后以I/O 4层访问模式改进collective I/O操作，提高了执行性能。

关键词: 非连续访问, 文件视图, Collective, I/O, 本地组

CLC Number: 

• TP311.52