180 lines
5.4 KiB
Groff
180 lines
5.4 KiB
Groff
|
'\" t
|
||
|
|
.\"
|
||
|
|
.\" CDDL HEADER START
|
||
|
|
.\"
|
||
|
|
.\" The contents of this file are subject to the terms of the
|
||
|
|
.\" Common Development and Distribution License (the "License").
|
||
|
|
.\" You may not use this file except in compliance with the License.
|
||
|
|
.\"
|
||
|
|
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
||
|
|
.\" or http://www.opensolaris.org/os/licensing.
|
||
|
|
.\" See the License for the specific language governing permissions
|
||
|
|
.\" and limitations under the License.
|
||
|
|
.\"
|
||
|
|
.\" When distributing Covered Code, include this CDDL HEADER in each
|
||
|
|
.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
||
|
|
.\" If applicable, add the following below this CDDL HEADER, with the
|
||
|
|
.\" fields enclosed by brackets "[]" replaced with your own identifying
|
||
|
|
.\" information: Portions Copyright [yyyy] [name of copyright owner]
|
||
|
|
.\"
|
||
|
|
.\" CDDL HEADER END
|
||
|
|
.\"
|
||
|
|
.\"
|
||
|
|
.\" Copyright (c) 2009 Oracle and/or its affiliates. All rights reserved.
|
||
|
|
.\" Copyright (c) 2009 Michael Gebetsroither <michael.geb@gmx.at>. All rights
|
||
|
|
.\" reserved.
|
||
|
|
.\"
|
||
|
|
.TH ztest 1 "2009 NOV 01" "ZFS on Linux" "User Commands"
|
||
|
|
|
||
|
|
.SH NAME
|
||
|
|
\fBztest\fR \- was written by the ZFS Developers as a ZFS unit test.
|
||
|
|
.SH SYNOPSIS
|
||
|
|
.LP
|
||
|
|
.BI "ztest <options>"
|
||
|
|
.SH DESCRIPTION
|
||
|
|
.LP
|
||
|
|
This manual page documents briefly the \fBztest\fR command.
|
||
|
|
.LP
|
||
|
|
\fBztest\fR was written by the ZFS Developers as a ZFS unit test. The
|
||
|
|
tool was developed in tandem with the ZFS functionality and was
|
||
|
|
executed nightly as one of the many regression test against the daily
|
||
|
|
build. As features were added to ZFS, unit tests were also added to
|
||
|
|
\fBztest\fR. In addition, a separate test development team wrote and
|
||
|
|
executed more functional and stress tests.
|
||
|
|
.LP
|
||
|
|
By default \fBztest\fR runs for ten minutes and uses block files
|
||
|
|
(stored in /tmp) to create pools rather than using physical disks.
|
||
|
|
Block files afford \fBztest\fR its flexibility to play around with
|
||
|
|
zpool components without requiring large hardware configurations.
|
||
|
|
However, storing the block files in /tmp may not work for you if you
|
||
|
|
have a small tmp directory.
|
||
|
|
.LP
|
||
|
|
By default is non-verbose. This is why entering the command above will
|
||
|
|
result in \fBztest\fR quietly executing for 5 minutes. The -V option
|
||
|
|
can be used to increase the verbosity of the tool. Adding multiple -V
|
||
|
|
option is allowed and the more you add the more chatty \fBztest\fR
|
||
|
|
becomes.
|
||
|
|
.LP
|
||
|
|
After the \fBztest\fR run completes, you should notice many ztest.*
|
||
|
|
files lying around. Once the run completes you can safely remove these
|
||
|
|
files. Note that you shouldn't remove these files during a run. You
|
||
|
|
can re-use these files in your next \fBztest\fR run by using the -E
|
||
|
|
option.
|
||
|
|
.SH OPTIONS
|
||
|
|
.HP
|
||
|
|
.BI "\-?" ""
|
||
|
|
.IP
|
||
|
|
Print a help summary.
|
||
|
|
.HP
|
||
|
|
.BI "\-v" " vdevs" " (default: 5)
|
||
|
|
.IP
|
||
|
|
Number of vdevs.
|
||
|
|
.HP
|
||
|
|
.BI "\-s" " size_of_each_vdev" " (default: 64M)"
|
||
|
|
.IP
|
||
|
|
Size of each vdev.
|
||
|
|
.HP
|
||
|
|
.BI "\-a" " alignment_shift" " (default: 9) (use 0 for random)"
|
||
|
|
.IP
|
||
|
|
Used alignment in test.
|
||
|
|
.HP
|
||
|
|
.BI "\-m" " mirror_copies" " (default: 2)"
|
||
|
|
.IP
|
||
|
|
Number of mirror copies.
|
||
|
|
.HP
|
||
|
|
.BI "\-r" " raidz_disks" " (default: 4)"
|
||
|
|
.IP
|
||
|
|
Number of raidz disks.
|
||
|
|
.HP
|
||
|
|
.BI "\-R" " raidz_parity" " (default: 1)"
|
||
|
|
.IP
|
||
|
|
Raidz parity.
|
||
|
|
.HP
|
||
|
|
.BI "\-d" " datasets" " (default: 7)"
|
||
|
|
.IP
|
||
|
|
Number of datasets.
|
||
|
|
.HP
|
||
|
|
.BI "\-t" " threads" " (default: 23)"
|
||
|
|
.IP
|
||
|
|
Number of threads.
|
||
|
|
.HP
|
||
|
|
.BI "\-g" " gang_block_threshold" " (default: 32K)"
|
||
|
|
.IP
|
||
|
|
Gang block threshold.
|
||
|
|
.HP
|
||
|
|
.BI "\-i" " initialize_pool_i_times" " (default: 1)"
|
||
|
|
.IP
|
||
|
|
Number of pool initialisations.
|
||
|
|
.HP
|
||
|
|
.BI "\-k" " kill_percentage" " (default: 70%)"
|
||
|
|
.IP
|
||
|
|
Kill percentage.
|
||
|
|
.HP
|
||
|
|
.BI "\-p" " pool_name" " (default: ztest)"
|
||
|
|
.IP
|
||
|
|
Pool name.
|
||
|
|
.HP
|
||
|
|
.BI "\-V(erbose)"
|
||
|
|
.IP
|
||
|
|
Verbose (use multiple times for ever more blather).
|
||
|
|
.HP
|
||
|
|
.BI "\-E(xisting)"
|
||
|
|
.IP
|
||
|
|
Use existing pool (use existing pool instead of creating new one).
|
||
|
|
.HP
|
||
|
|
.BI "\-T" " time" " (default: 300 sec)"
|
||
|
|
.IP
|
||
|
|
Total test run time.
|
||
|
|
.HP
|
||
|
|
.BI "\-z" " zil_failure_rate" " (default: fail every 2^5 allocs)
|
||
|
|
.IP
|
||
|
|
Injected failure rate.
|
||
|
|
.HP
|
||
|
|
.BI "\-G"
|
||
|
|
.IP
|
||
|
|
Dump zfs_dbgmsg buffer before exiting.
|
||
|
|
.SH "EXAMPLES"
|
||
|
|
.LP
|
||
|
|
To override /tmp as your location for block files, you can use the -f
|
||
|
|
option:
|
||
|
|
.IP
|
||
|
|
ztest -f /
|
||
|
|
.LP
|
||
|
|
To get an idea of what ztest is actually testing try this:
|
||
|
|
.IP
|
||
|
|
ztest -f / -VVV
|
||
|
|
.LP
|
||
|
|
Maybe you'd like to run ztest for longer? To do so simply use the -T
|
||
|
|
option and specify the runlength in seconds like so:
|
||
|
|
.IP
|
||
|
|
ztest -f / -V -T 120
|
||
|
|
|
||
|
|
.SH "ENVIRONMENT VARIABLES"
|
||
|
|
.TP
|
||
|
|
.B "ZFS_HOSTID=id"
|
||
|
|
Use \fBid\fR instead of the SPL hostid to identify this host. Intended for use
|
||
|
|
with ztest, but this environment variable will affect any utility which uses
|
||
|
|
libzpool, including \fBzpool(8)\fR. Since the kernel is unaware of this setting
|
||
|
|
results with utilities other than ztest are undefined.
|
||
|
|
.TP
|
||
|
|
.B "ZFS_STACK_SIZE=stacksize"
|
||
|
|
Limit the default stack size to \fBstacksize\fR bytes for the purpose of
|
||
|
|
detecting and debugging kernel stack overflows. This value defaults to
|
||
|
|
\fB32K\fR which is double the default \fB16K\fR Linux kernel stack size.
|
||
|
|
|
||
|
|
In practice, setting the stack size slightly higher is needed because
|
||
|
|
differences in stack usage between kernel and user space can lead to spurious
|
||
|
|
stack overflows (especially when debugging is enabled). The specified value
|
||
|
|
will be rounded up to a floor of PTHREAD_STACK_MIN which is the minimum stack
|
||
|
|
required for a NULL procedure in user space.
|
||
|
|
|
||
|
|
By default the stack size is limited to 256K.
|
||
|
|
.SH "SEE ALSO"
|
||
|
|
.BR "spl-module-parameters (5)" ","
|
||
|
|
.BR "zpool (1)" ","
|
||
|
|
.BR "zfs (1)" ","
|
||
|
|
.BR "zdb (1)" ","
|
||
|
|
.SH "AUTHOR"
|
||
|
|
This manual page was transferred to asciidoc by Michael Gebetsroither
|
||
|
|
<gebi@grml.org> from http://opensolaris.org/os/community/zfs/ztest/
|