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Many thanks to Joshua Kinard, Siva Mahadevan, Yasuhiro Kimura, Andrew Walker, and Peter Eriksson for their patches. PR: 270383
122 lines
3.2 KiB
Groff
122 lines
3.2 KiB
Groff
'\" t
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.\" Title: ping_pong
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.\" Author:
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.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
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.\" Date: 09/23/2020
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.\" Manual: CTDB - clustered TDB database
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.\" Source: ctdb
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.\" Language: English
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.\"
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.TH "PING_PONG" "1" "09/23/2020" "ctdb" "CTDB \- clustered TDB database"
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.\" -----------------------------------------------------------------
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.\" * Define some portability stuff
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.\" -----------------------------------------------------------------
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.\" http://bugs.debian.org/507673
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.ie \n(.g .ds Aq \(aq
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.el .ds Aq '
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.\" -----------------------------------------------------------------
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.\" * set default formatting
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.\" -----------------------------------------------------------------
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.\" disable hyphenation
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.nh
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.\" disable justification (adjust text to left margin only)
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.ad l
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.\" -----------------------------------------------------------------
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.\" * MAIN CONTENT STARTS HERE *
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.\" -----------------------------------------------------------------
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.SH "NAME"
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ping_pong \- measures the ping\-pong byte range lock latency
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.SH "SYNOPSIS"
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.HP \w'\fBping_pong\fR\ 'u
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\fBping_pong\fR {\-r | \-w | \-rw} [\-m] [\-c] {\fIFILENAME\fR} {\fINUM\-LOCKS\fR}
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.SH "DESCRIPTION"
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.PP
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ping_pong measures the byte range lock latency\&. It is especially useful on a cluster of nodes sharing a common lock manager as it will give some indication of the lock manager\*(Aqs performance under stress\&.
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.PP
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FILENAME is a file on shared storage to use for byte range locking tests\&.
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.PP
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NUM\-LOCKS is the number of byte range locks, so needs to be (strictly) greater than the number of nodes in the cluster\&.
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.SH "OPTIONS"
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.PP
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\-r
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.RS 4
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test read performance
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.RE
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.PP
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\-w
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.RS 4
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test write performance
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.RE
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.PP
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\-m
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.RS 4
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use mmap
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.RE
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.PP
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\-c
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.RS 4
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validate the locks
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.RE
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.SH "EXAMPLES"
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.PP
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Testing lock coherence
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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ping_pong test\&.dat N
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.fi
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.if n \{\
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.RE
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.\}
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.PP
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Testing lock coherence with lock validation
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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ping_pong \-c test\&.dat N
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.fi
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.if n \{\
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.RE
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.\}
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.PP
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Testing IO coherence
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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ping_pong \-rw test\&.dat N
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.fi
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.if n \{\
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.RE
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.\}
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.SH "SEE ALSO"
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.PP
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\fBctdb\fR(7),
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\m[blue]\fB\%https://wiki.samba.org/index.php/Ping_pong\fR\m[]
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.SH "AUTHOR"
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.br
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.PP
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This documentation was written by Mathieu Parent
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.SH "COPYRIGHT"
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.br
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Copyright \(co 2002 Andrew Tridgell
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.br
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.PP
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This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version\&.
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.PP
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This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE\&. See the GNU General Public License for more details\&.
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.PP
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You should have received a copy of the GNU General Public License along with this program; if not, see
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\m[blue]\fB\%http://www.gnu.org/licenses\fR\m[]\&.
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.sp
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