NAME
tiobench - Threaded I/O bench
SYNOPSIS
tiobench [--help] [--nofrag] [--size SizeInMB [--size ...]] [--numruns
NumberOfRuns [--numruns ...]] [--dir TestDir [--dir ...]] [--block
BlkSizeInBytes [--block ...]] [--random NumberRandOpsPerThread
[--random ...]] [--threads NumberOfThreads [--threads ...]]
DESCRIPTION
tiobench is a perl wrapper to tiotest calling it multiple times with
varying sets of parameters as instructed.
OPTIONS
--help Display a brief help and exit.
--nofrag
Instructs tiobench to pass -W to tiotest so it waits for
previous threads to finish before starting a new one in the
writing phase. For more info see the -W option in the
tiotest(1) manpage.
--size SizeInMB
The total size in MBytes of the files may use together. If this
option is not given, tiobench tries to be smart and figure out
a size making sense.
--numruns NumberOfRuns
This number specifies over how many runs each test should be
averaged. Defaults to 1.
--dir TestDir
The directory in which to test. Defaults to ., the current
directory.
--block BlkSizeInBytes
The blocksize in Bytes to use. Defaults to 4096.
--random NumberRandOpsPerThread
Random I/O operations per thread. Defaults to 1000.
--threads NumberOfThreads
The number of concurrent test threads. Defaults to 4.
The options --size, --numruns, --dir, --block, --random, and --threads
may be given multiple times to cover multiple cases, for instance:
tiobench --block 4096 --block 8192 will first run through with a 4KB
block size and then again with a 8KB block size.
To get usefull results the used file sizes should be a lot larger than
the physical amount of memory you have. A good idea is to boot with 16
Megs of RAM (Try passing the "mem=16M" option to the kernel to limit
Linux to using a very small amount of memory) and into Single User mode
only.
SEE ALSO
tiotest(1), bonnie(1), hdparm(8)
AUTHOR
tiobench was written by James Manning <jmm@computer.org>.
This manual page was written by Peter Palfrader
<weasel@debian.org>, for the Debian GNU/Linux system (but may be used
by others).