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6315432f87
This includes new manpages for ctdb.7, ctdb.conf.5 and ctdb-tunables.7. Signed-off-by: Martin Schwenke <martin@meltin.net> Pair-programmed-with: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit 15b5c6c00c248bc1a8364a6da103296a55d7bfb6)
165 lines
3.9 KiB
XML
165 lines
3.9 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!DOCTYPE refentry
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PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
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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">ctdb</refmiscinfo>
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<refmiscinfo class="manual">CTDB - clustered TDB database</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</command>
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<group choice="req">
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<arg choice="plain">-r</arg>
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<arg choice="plain">-w</arg>
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<arg choice="plain">-rw</arg>
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</group>
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<arg>-m</arg>
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<arg>-c</arg>
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<arg choice="req"><replaceable>FILENAME</replaceable></arg>
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<arg choice="req"><replaceable>NUM-LOCKS</replaceable></arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>DESCRIPTION</title>
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<para>
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ping_pong measures the byte range lock latency. It is especially
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useful on a cluster of nodes sharing a common lock manager as it
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will give some indication of the lock manager's performance
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under stress.
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</para>
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<para>
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FILENAME is a file on shared storage to use for byte range
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locking tests.
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</para>
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<para>
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NUM-LOCKS is the number of byte range locks, so needs to be
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(strictly) greater than the number of nodes in the cluster.
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</para>
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</refsect1>
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<refsect1>
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<title>OPTIONS</title>
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<variablelist>
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<varlistentry>
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<term>-r</term>
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<listitem>
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<para>
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test read performance
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>-w</term>
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<listitem>
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<para>
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test write performance
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<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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<varlistentry>
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<term>-c</term>
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<listitem>
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<para>
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validate the locks
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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>
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<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 lock coherence with lock validation
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</para>
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<screen format="linespecific">
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ping_pong -c 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>
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<title>SEE ALSO</title>
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<para>
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<citerefentry><refentrytitle>ctdb</refentrytitle>
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<manvolnum>7</manvolnum></citerefentry>,
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<ulink url="https://wiki.samba.org/index.php/Ping_pong"/>
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</para>
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</refsect1>
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<refentryinfo>
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<author>
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<contrib>
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This documentation was written by Mathieu Parent
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</contrib>
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</author>
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<copyright>
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<year>2002</year>
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<holder>Andrew Tridgell</holder>
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</copyright>
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<legalnotice>
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<para>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 3 of
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the License, or (at your option) any later version.
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</para>
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<para>
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This program is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied
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warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the GNU General Public License for more details.
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</para>
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<para>
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You should have received a copy of the GNU General Public
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License along with this program; if not, see
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<ulink url="http://www.gnu.org/licenses"/>.
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</para>
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</legalnotice>
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</refentryinfo>
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</refentry>
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