Table of Contents
Optimizing IO
Rules for best IO performance
IO Bottleneck - fyods
Rules for Stream IO and Shared File IO
File systems - NFS (slowest) & UFS (still slow)
File systems PFS file system
C and Fortran IO APIs
IO Results Impacted by Many Factors
IO Results - C Streams
IO Results - C write/read/cwrite/cread
IO Results - C Shared File - Without ‘yod -masync’
IO Results: C Shared File with ‘yod -masync’ and Best API
IO Results: F77 read/write
IO Results: F90 using Async IO
Sample programs using sync IO and async IO
|
Author: Ben Cole
Email: pfay@lanl.gov
Download presentation source
|