2013-03-13 00:26:50 +04:00
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.\" CDDL HEADER END
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.\"
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.\"
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.\" Copyright (c) 2009 Oracle and/or its affiliates. All rights reserved.
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.\" Copyright (c) 2009 Michael Gebetsroither <michael.geb@gmx.at>. All rights
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.\" reserved.
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.\"
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2013-03-17 00:54:32 +04:00
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.TH ztest 1 "2009 NOV 01" "ZFS on Linux" "User Commands"
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2013-03-13 00:26:50 +04:00
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.SH NAME
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\fBztest\fR \- was written by the ZFS Developers as a ZFS unit test.
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.SH SYNOPSIS
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.LP
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.BI "ztest <options>"
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.SH DESCRIPTION
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.LP
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This manual page documents briefly the \fBztest\fR command.
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.LP
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\fBztest\fR was written by the ZFS Developers as a ZFS unit test. The
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tool was developed in tandem with the ZFS functionality and was
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executed nightly as one of the many regression test against the daily
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build. As features were added to ZFS, unit tests were also added to
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\fBztest\fR. In addition, a separate test development team wrote and
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executed more functional and stress tests.
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.LP
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By default \fBztest\fR runs for ten minutes and uses block files
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(stored in /tmp) to create pools rather than using physical disks.
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Block files afford \fBztest\fR its flexibility to play around with
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zpool components without requiring large hardware configurations.
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However, storing the block files in /tmp may not work for you if you
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have a small tmp directory.
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.LP
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By default is non-verbose. This is why entering the command above will
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result in \fBztest\fR quietly executing for 5 minutes. The -V option
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can be used to increase the verbosity of the tool. Adding multiple -V
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option is allowed and the more you add the more chatty \fBztest\fR
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becomes.
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.LP
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After the \fBztest\fR run completes, you should notice many ztest.*
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files lying around. Once the run completes you can safely remove these
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files. Note that you shouldn't remove these files during a run. You
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can re-use these files in your next \fBztest\fR run by using the -E
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option.
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.SH OPTIONS
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.HP
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.BI "\-?" ""
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.IP
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Print a help summary.
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.HP
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.BI "\-v" " vdevs" " (default: 5)
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.IP
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Number of vdevs.
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.HP
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.BI "\-s" " size_of_each_vdev" " (default: 64M)"
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.IP
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Size of each vdev.
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.HP
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.BI "\-a" " alignment_shift" " (default: 9) (use 0 for random)"
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.IP
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Used alignment in test.
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.HP
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.BI "\-m" " mirror_copies" " (default: 2)"
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.IP
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Number of mirror copies.
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.HP
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.BI "\-r" " raidz_disks" " (default: 4)"
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.IP
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Number of raidz disks.
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.HP
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.BI "\-R" " raidz_parity" " (default: 1)"
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.IP
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Raidz parity.
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.HP
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.BI "\-d" " datasets" " (default: 7)"
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.IP
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Number of datasets.
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.HP
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.BI "\-t" " threads" " (default: 23)"
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.IP
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Number of threads.
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.HP
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.BI "\-g" " gang_block_threshold" " (default: 32K)"
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.IP
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Gang block threshold.
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.HP
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.BI "\-i" " initialize_pool_i_times" " (default: 1)"
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.IP
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Number of pool initialisations.
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.HP
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.BI "\-k" " kill_percentage" " (default: 70%)"
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.IP
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Kill percentage.
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.HP
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.BI "\-p" " pool_name" " (default: ztest)"
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.IP
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Pool name.
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.HP
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.BI "\-V(erbose)"
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.IP
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Verbose (use multiple times for ever more blather).
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.HP
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.BI "\-E(xisting)"
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.IP
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Use existing pool (use existing pool instead of creating new one).
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.HP
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.BI "\-T" " time" " (default: 300 sec)"
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.IP
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Total test run time.
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.HP
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.BI "\-z" " zil_failure_rate" " (default: fail every 2^5 allocs)
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.IP
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Injected failure rate.
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.SH "EXAMPLES"
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.LP
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To override /tmp as your location for block files, you can use the -f
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option:
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.IP
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ztest -f /
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.LP
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To get an idea of what ztest is actually testing try this:
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.IP
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ztest -f / -VVV
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.LP
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Maybe you'd like to run ztest for longer? To do so simply use the -T
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option and specify the runlength in seconds like so:
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.IP
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ztest -f / -V -T 120
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.SH "SEE ALSO"
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.BR "zpool (1)" ","
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.BR "zfs (1)" ","
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.BR "zdb (1)" ","
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.SH "AUTHOR"
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This manual page was transvered to asciidoc by Michael Gebetsroither
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<gebi@grml.org> from http://opensolaris.org/os/community/zfs/ztest/
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