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This was added to be able to notice startup failures when unknown tunables were present in the configuration. Tunables are now set by the daemon, so this is no longer necessary. Signed-off-by: Martin Schwenke <martin@meltin.net> Reviewed-by: Amitay Isaacs <amitay@gmail.com>
241 lines
6.4 KiB
XML
241 lines
6.4 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="ctdb.sysconfig.5">
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<refmeta>
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<refentrytitle>ctdb.sysconfig</refentrytitle>
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<manvolnum>5</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>ctdb.sysconfig</refname>
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<refpurpose>CTDB daemon configuration file</refpurpose>
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</refnamediv>
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<refsect1>
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<title>DESCRIPTION</title>
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<para>
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This file contains configuration that affects the operation of
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CTDB. This is a distribution-specific service configuration
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file such as <filename>/etc/sysconfig/ctdb</filename> (Red Hat)
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or <filename>/etc/default/ctdb</filename> (Debian) and is a
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shell script (see
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<citerefentry><refentrytitle>sh</refentrytitle>
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<manvolnum>1</manvolnum></citerefentry>).
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</para>
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</refsect1>
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<refsect1>
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<title>
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GLOBAL CONFIGURATION
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</title>
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<variablelist>
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<varlistentry>
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<term>CTDB_INIT_STYLE=debian|redhat|suse</term>
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<listitem>
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<para>
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This is the init style used by the Linux distribution (or
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other operating system) being used. This is usually
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determined dynamically by checking the system. This
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variable is used by the initscript to determine which init
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system primitives to use. It is also used by some
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eventscripts to choose the name of initscripts for certain
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services, since these can vary between distributions.
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</para>
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<para>
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If using CTDB's event scripts are unable to determine an
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appropriate default then this option can also be placed in
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a relevant
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<citerefentry><refentrytitle>ctdb-script.options</refentrytitle>
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<manvolnum>5</manvolnum></citerefentry> file.
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</para>
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<para>
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Default: NONE. Guessed, based on features of
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distribution.
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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>
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RESOURCE LIMITS
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</title>
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<refsect2>
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<title>
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Maximum number of open files
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</title>
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<para>
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CTDB can use a lot of file descriptors, especially when used
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with Samba. If there are thousands of smbd processes
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connected to CTDB when this can mean that thousands of file
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descriptors are used. For CTDB, it is often necessary to
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increase limit on the maximum number of open files.
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</para>
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<para>
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The maximum number of open files should be configured using an
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operating system mechanism.
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</para>
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<variablelist>
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<varlistentry>
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<term>
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systemd
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</term>
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<listitem>
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<para>
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The
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<literal>LimitNOFILE=<option>LIMIT</option></literal>
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option can be used in a unit/service file increase the
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maximum number of open files. See
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<citerefentry><refentrytitle>systemd.exec</refentrytitle>
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<manvolnum>5</manvolnum></citerefentry> for details.
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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>
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SYSV init
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</term>
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<listitem>
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<para>
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Use a command like <command>ulimit -n
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<option>LIMIT</option></command> to increase the maximum
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number of open files. This command can be put in the
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relevant distribution-specific service configuration file.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect2>
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<refsect2>
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<title>
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Allowing core dumps
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</title>
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<para>
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Many distributions do not allow core dump files to be
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generated by default. To assist with debugging, core files
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can be enabled. This should be configured using an operating
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system mechanism.
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</para>
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<variablelist>
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<varlistentry>
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<term>
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systemd
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</term>
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<listitem>
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<para>
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The <literal>LimitCORE=0|unlimited</literal> option can
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be used in a unit/service file. <literal>0</literal>
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disallows core files, <literal>unlimited</literal>
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allows them. maximum number of open files. See
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<citerefentry><refentrytitle>systemd.exec</refentrytitle>
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<manvolnum>5</manvolnum></citerefentry> for details.
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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>
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SYSV init
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</term>
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<listitem>
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<para>
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Use a command like <command>ulimit -c 0|unlimited</command>
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to disable or enable core files as required. This
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command can be put in the relevant distribution-specific
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service configuration file.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect2>
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</refsect1>
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<refsect1>
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<title>FILES</title>
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<simplelist>
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<member><filename>/etc/sysconfig/ctdb</filename></member>
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<member><filename>/etc/default/ctdb</filename></member>
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<member><filename>/usr/local/etc/ctdb/script.options</filename></member>
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</simplelist>
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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>ctdbd</refentrytitle>
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<manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>ctdb-script.options</refentrytitle>
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<manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>ctdb</refentrytitle>
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<manvolnum>7</manvolnum></citerefentry>,
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<ulink url="http://ctdb.samba.org/"/>
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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
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Martin Schwenke
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</contrib>
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</author>
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<copyright>
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<year>2007</year>
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<holder>Andrew Tridgell</holder>
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<holder>Ronnie Sahlberg</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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