mirror of
https://github.com/samba-team/samba.git
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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
XML
111 lines
2.8 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
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<refentry id="ping_pong.1">
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<refmeta>
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<refentrytitle>ping_pong</refentrytitle>
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<manvolnum>1</manvolnum>
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<refmiscinfo class="source"> </refmiscinfo>
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<refmiscinfo class="manual"> </refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>ping_pong</refname>
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<refpurpose>measures the ping-pong byte range lock latency</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>ping_pong [options] <file> <num_locks></command>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>ping_pong</command>
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<arg choice="opt">-r</arg>
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<arg choice="opt">-w</arg>
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<arg choice="opt">-m</arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1><title>DESCRIPTION</title>
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<para>
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This measures the ping-pong byte range lock latency. It is
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especially useful on a cluster of nodes sharing a common lock
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manager as it will give some indication of the lock managers
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performance under stress.
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</para>
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</refsect1>
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<refsect1><title>OPTIONS</title>
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<variablelist>
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<varlistentry><term>-r</term>
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<listitem>
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<para>
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do reads
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term>-w</term>
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<listitem>
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<para>
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do writes
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term>-m</term>
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<listitem>
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<para>
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use mmap
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1><title>EXAMPLES</title>
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<para>
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Testing lock coherence
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</para>
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<screen format="linespecific">
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ping_pong test.dat N
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</screen>
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<para>
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Testing IO coherence
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</para>
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<screen format="linespecific">
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ping_pong -rw test.dat N
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</screen>
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</refsect1>
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<refsect1><title>SEE ALSO</title>
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<para>
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<ulink url="https://wiki.samba.org/index.php/Ping_pong"/>, ctdb(1), ctdbd(1)
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</para>
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</refsect1>
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<refsect1><title>COPYRIGHT/LICENSE</title>
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<literallayout>
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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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</literallayout>
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</refsect1>
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</refentry>
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