iowhip is a simple I/O stressing tool.
go get github.com/voxelbrain/iowhip
$ iowhip --help
Usage: iowhip [global options]
Global options:
-c, --cores Number of cores to use (default: 4)
-t, --threads Number of threads to use (default: 4)
-b, --block-size Number of bytes to write with each call (default: 4.000K)
-f, --file-size Number of zeroes to write to each file (*)
-o, --output-dir Output directory (default: /var/folders/k4/4rlzbxl14d9_2k_jwyfv_nzh0000gn/T/)
-s, --sync Sync after every written block
-k, --keep-files Dont delete files when done
--dsync Open files with O_DSYNC (Linux only)
--direct Open files with O_DIRECT (Linux only)
--osync Open files with O_SYNC
-h, --help Show this help
$ iowhip -f 1G
2013/03/20 16:04:42 Starting 4 workers on 4 cores writing 1.000G bytes (4.000K per call)...
2013/03/20 16:04:42 Thread 0: Using /var/folders/k4/4rlzbxl14d9_2k_jwyfv_nzh0000gn/T/iowhip_1363791882334221000/0
2013/03/20 16:04:42 Thread 3: Using /var/folders/k4/4rlzbxl14d9_2k_jwyfv_nzh0000gn/T/iowhip_1363791882334221000/3
2013/03/20 16:04:42 Thread 1: Using /var/folders/k4/4rlzbxl14d9_2k_jwyfv_nzh0000gn/T/iowhip_1363791882334221000/1
2013/03/20 16:04:42 Thread 2: Using /var/folders/k4/4rlzbxl14d9_2k_jwyfv_nzh0000gn/T/iowhip_1363791882334221000/2
Thread Total Time Total Speed Writing Time Writing Speed
1 19.995106s 51.213M/s 19.99464s 51.214M/s
2 20.07883s 50.999M/s 20.078598s 51.000M/s
0 20.237617s 50.599M/s 20.237483s 50.599M/s
3 20.302615s 50.437M/s 20.302451s 50.437M/s
Version 1.3.6