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c3c65e3cfb
This change introduces long options for ztest. It builds the usage message as well as the long_options array from a single table. It also adds #defines for the default values. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: John Kennedy <john.kennedy@delphix.com> Signed-off-by: Manoj Joseph <manoj.joseph@delphix.com> Closes #12117
217 lines
6.3 KiB
Groff
217 lines
6.3 KiB
Groff
'\" t
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.\"
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.\" CDDL HEADER START
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.\"
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.\" The contents of this file are subject to the terms of the
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.\" Common Development and Distribution License (the "License").
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.\" You may not use this file except in compliance with the License.
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.\"
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.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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.\" or http://www.opensolaris.org/os/licensing.
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.\" See the License for the specific language governing permissions
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.\" and limitations under the License.
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.\"
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.\" When distributing Covered Code, include this CDDL HEADER in each
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.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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.\" If applicable, add the following below this CDDL HEADER, with the
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.\" fields enclosed by brackets "[]" replaced with your own identifying
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.\" information: Portions Copyright [yyyy] [name of copyright owner]
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.\"
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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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.\" Copyright (c) 2017, Intel Corporation.
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.\"
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.TH ZTEST 1 "Aug 24, 2020" OpenZFS
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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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.BR "\-h, -?, --help"
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.IP
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Print a help summary.
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.HP
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.BR "\-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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.BR "\-s, --vdev-size=" " (default: 64M)"
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.IP
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Size of each vdev.
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.HP
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.BR "\-a, --alignment-shift=" " (default: 9) (use 0 for random)"
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.IP
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Alignment shift used in test.
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.HP
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.BR "\-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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.BR "\-r, --raid-disks=" " (default: 4 for raidz/ 16 for draid)"
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.IP
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Number of raidz/draid disks.
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.HP
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.BR "\-R, --raid-parity=" " (default: 1)"
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.IP
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Raid parity (raidz & draid).
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.HP
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.BR "\-K, --raid-kind=" " (default: 'random') raidz|draid|random"
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.IP
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The kind of RAID config to use. With 'random' the kind alternates between raidz and draid.
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.HP
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.BR "\-D, --draid-data=" " (default: 4)"
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.IP
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Number of data disks in a dRAID redundancy group.
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.HP
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.BR "\-S, --draid-spares=" " (default: 1)"
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.IP
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Number of dRAID distributed spare disks.
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.HP
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.BR "\-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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.BR "\-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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.BR "\-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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.BR "\-i, --init-count=" " (default: 1)"
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.IP
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Number of pool initializations.
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.HP
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.BR "\-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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.BR "\-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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.BR "\-f, --vdev-file-directory=" " (default: /tmp)"
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.IP
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File directory for vdev files.
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.HP
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.BR "\-M, --multi-host"
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.IP
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Multi-host; simulate pool imported on remote host.
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.HP
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.BR "\-E, --use-existing-pool"
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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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.BR "\-T, --run-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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.BR "\-P, --pass-time=" " (default: 60 sec)"
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.IP
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Time per pass.
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.HP
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.BR "\-F, --freeze-loops=" " (default: 50)"
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.IP
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Max loops in spa_freeze().
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.HP
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.BR "\-B, --alt-ztest="
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.IP
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Alternate ztest path.
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.HP
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.BR "\-C, --vdev-class-state=on|off|random" " (default: random)"
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.IP
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The vdev allocation class state.
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.HP
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.BR "\-o, --option="
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.IP
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Set global variable to an unsigned 32-bit integer value.
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.HP
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.BR "\-G, --dump-debug"
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.IP
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Dump zfs_dbgmsg buffer before exiting due to an error.
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.HP
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.BR "\-V, --verbose"
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.IP
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Verbose (use multiple times for ever more verbosity).
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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 "ENVIRONMENT VARIABLES"
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.TP
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.B "ZFS_HOSTID=id"
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Use \fBid\fR instead of the SPL hostid to identify this host. Intended for use
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with ztest, but this environment variable will affect any utility which uses
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libzpool, including \fBzpool(8)\fR. Since the kernel is unaware of this setting
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results with utilities other than ztest are undefined.
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.TP
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.B "ZFS_STACK_SIZE=stacksize"
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Limit the default stack size to \fBstacksize\fR bytes for the purpose of
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detecting and debugging kernel stack overflows. This value defaults to
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\fB32K\fR which is double the default \fB16K\fR Linux kernel stack size.
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In practice, setting the stack size slightly higher is needed because
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differences in stack usage between kernel and user space can lead to spurious
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stack overflows (especially when debugging is enabled). The specified value
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will be rounded up to a floor of PTHREAD_STACK_MIN which is the minimum stack
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required for a NULL procedure in user space.
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By default the stack size is limited to 256K.
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.SH "SEE ALSO"
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.BR "spl-module-parameters (5)" ","
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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 transferred to asciidoc by Michael Gebetsroither
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<gebi@grml.org> from http://opensolaris.org/os/community/zfs/ztest/
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