gfperf-parallel-write
[-t, --testdir test directory
] [-m, --gfarm2fs gfarm2fs mount point
] [-l, --filesize file size
] [-b, --bufsize buffer size
] [-r, --random random
] [-g, --gfsd gfsd name
] [-o, --overwrite overwrite flag
] [-k, --timeout timeout seconds
] [-n, --name group name
] [-w, --wait start time
]
This command mesures file write performance of specified size of file in test directory
.
The test file is automatically created and removed.
If overwrite flag is on, test file is not removed to be reused again.
This command is expected to be called by gfperf.rb in parallel.
-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 write test file. The default is 4K. (1K=2^10)
-r, --random
random
Only if this option is specified, Writes test file randomly. Option parameter is free. If this option is omitted, this command writes test file sequentially.
-g, --gfsd
gfsd name
Specify gfsd name on which test file is created. If this option is omitted, gfmd determines automatically.
-o, --overwrite
overwrite flag
Only if this option is specified, Overwrite test file. Option parameter is free. If this option is omitted, this command appends test data on 1 byte file.
-k, --timeout
timeout seconds
Maximum write time in seconds. This comannd measures how much data to be written in this seconds.
-n, --name
group name
Group name in parallel execution.
-w, --wait
start time
Start time specified by gfperf.rb. This command waits until start time. Start time is written in UTC (YYYY-MM-DDThh:mm:ssZ) and must be in 10 seconds from current time.