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4a43450968
Signed-off-by: Michael Adam <obnox@samba.org> (This used to be ctdb commit af75d3e37412e03d3978073edbe6dee78f265c3c)
111 lines
2.8 KiB
Groff
111 lines
2.8 KiB
Groff
'\" t
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.\" Title: ping_pong
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.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
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.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/>
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.\" Date: 03/26/2011
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.\" Manual:
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.\" Source:
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.\" Language: English
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.\"
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.TH "PING_PONG" "1" "03/26/2011" "" ""
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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\ [options]\ <file>\ <num_locks>\fR\ 'u
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\fBping_pong [options] <file> <num_locks>\fR
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.HP \w'\fBping_pong\fR\ 'u
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\fBping_pong\fR [\-r] [\-w] [\-m]
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.SH "DESCRIPTION"
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.PP
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This measures the ping\-pong 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 managers performance under stress\&.
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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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do reads
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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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do writes
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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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.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 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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\m[blue]\fB\%https://wiki.samba.org/index.php/Ping_pong\fR\m[], ctdb(1), ctdbd(1)
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.SH "COPYRIGHT/LICENSE"
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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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Copyright (C) Andrew Tridgell 2002
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or (at
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your option) any later version\&.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE\&. See the GNU
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General Public License for more details\&.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see http://www\&.gnu\&.org/licenses/\&.
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.fi
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.if n \{\
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.RE
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.\}
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