19 May 2012
gfperf-read 1 Gfarm
gfperf-read Gfarm measure file read performance
`gfperf-read` -t, --testdir test directory -m, --gfarm2fs gfarm2fs mount point -l, --filesize file size -b, --bufsize buffer size -r, --random random -g, --gfsd gfsd name -k, --timeout timeout seconds

## DESCRIPTION

This command mesures file read performance of specified size of file in test directory. The test file is automatically created and not removed to be reused again.

## OPTIONS

`-t, --testdir` test directory

  Test file is created in test directory. Specify only gfarm url (that begins with gfarm:///) . The default is gfarm:///tmp .

`-m, --gfarm2fs` gfarm2fs mount point

  Specify gfarm2fs mount point.

`-l, --filesize` file size

  File size to be created. The default is 1M. (1G=2^20)

`-b, --bufsize` buffer size

  Buffer size to read test file. The default is 4K. (1K=2^10)

`-r, --random` random

  Only if this option is specified, Reads test file randomly. Option parameter is free. If this option is omitted, this command reads test file sequentially.

`-g, --gfsd` gfsd name

  Specify gfsd name on which test file is created. If this option is omitted, gfmd determines automatically.

`-k, --timeout` timeout seconds

  Maximum read time in seconds. This comannd measures how much data to be read in this seconds.