s3:include: Remove trailing whitepaces in MacExtensions.h
[Samba.git] / ctdb / doc / ctdb.sysconfig.5.xml
blob26189348360d70a29fd4b7b1d0f49692cd13fd12
1 <?xml version="1.0" encoding="iso-8859-1"?>
2 <!DOCTYPE refentry
3         PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
4         "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
6 <refentry id="ctdb.sysconfig.5">
8   <refmeta>
9     <refentrytitle>ctdb.sysconfig</refentrytitle>
10     <manvolnum>5</manvolnum>
11     <refmiscinfo class="source">ctdb</refmiscinfo>
12     <refmiscinfo class="manual">CTDB - clustered TDB database</refmiscinfo>
13   </refmeta>
15   <refnamediv>
16     <refname>ctdb.sysconfig</refname>
17     <refpurpose>CTDB daemon configuration file</refpurpose>
18   </refnamediv>
20   <refsect1>
21     <title>DESCRIPTION</title>
23     <para>
24       This file contains configuration that affects the operation of
25       CTDB.  This is a distribution-specific service configuration
26       file such as <filename>/etc/sysconfig/ctdb</filename> (Red Hat)
27       or <filename>/etc/default/ctdb</filename> (Debian) and is a
28       shell script (see
29       <citerefentry><refentrytitle>sh</refentrytitle>
30       <manvolnum>1</manvolnum></citerefentry>).
31     </para>
33   </refsect1>
35   <refsect1>
36     <title>
37       GLOBAL CONFIGURATION
38     </title>
40     <variablelist>
42       <varlistentry>
43         <term>CTDB_INIT_STYLE=debian|redhat|suse</term>
44         <listitem>
45           <para>
46             This is the init style used by the Linux distribution (or
47             other operating system) being used.  This is usually
48             determined dynamically by checking the system.  This
49             variable is used by the initscript to determine which init
50             system primitives to use.  It is also used by some
51             eventscripts to choose the name of initscripts for certain
52             services, since these can vary between distributions.
53           </para>
54           <para>
55             If using CTDB's event scripts are unable to determine an
56             appropriate default then this option can also be placed in
57             a relevant
58             <citerefentry><refentrytitle>ctdb-script.options</refentrytitle>
59             <manvolnum>5</manvolnum></citerefentry> file.
60           </para>
61           <para>
62             Default: NONE.  Guessed, based on features of
63             distribution.
64           </para>
65         </listitem>
66       </varlistentry>
68     </variablelist>
69   </refsect1>
71   <refsect1>
72     <title>
73       RESOURCE LIMITS
74     </title>
76     <refsect2>
77       <title>
78         Maximum number of open files
79       </title>
81       <para>
82         CTDB can use a lot of file descriptors, especially when used
83         with Samba.  If there are thousands of smbd processes
84         connected to CTDB when this can mean that thousands of file
85         descriptors are used.  For CTDB, it is often necessary to
86         increase limit on the maximum number of open files.
87       </para>
89       <para>
90         The maximum number of open files should be configured using an
91         operating system mechanism.
92       </para>
94       <variablelist>
96         <varlistentry>
97           <term>
98             systemd
99           </term>
100           <listitem>
101             <para>
102               The
103               <literal>LimitNOFILE=<option>LIMIT</option></literal>
104               option can be used in a unit/service file increase the
105               maximum number of open files.  See
106               <citerefentry><refentrytitle>systemd.exec</refentrytitle>
107               <manvolnum>5</manvolnum></citerefentry> for details.
108             </para>
109           </listitem>
110         </varlistentry>
112         <varlistentry>
113           <term>
114             SYSV init
115           </term>
116           <listitem>
117             <para>
118               Use a command like <command>ulimit -n
119               <option>LIMIT</option></command> to increase the maximum
120               number of open files.  This command can be put in the
121               relevant distribution-specific service configuration file.
122             </para>
123           </listitem>
124         </varlistentry>
126       </variablelist>
128     </refsect2>
130     <refsect2>
131       <title>
132         Allowing core dumps
133       </title>
135       <para>
136         Many distributions do not allow core dump files to be
137         generated by default.  To assist with debugging, core files
138         can be enabled.  This should be configured using an operating
139         system mechanism.
140       </para>
142       <variablelist>
144         <varlistentry>
145           <term>
146             systemd
147           </term>
148           <listitem>
149             <para>
150               The <literal>LimitCORE=0|unlimited</literal> option can
151               be used in a unit/service file.  <literal>0</literal>
152               disallows core files, <literal>unlimited</literal>
153               allows them.  maximum number of open files.  See
154               <citerefentry><refentrytitle>systemd.exec</refentrytitle>
155               <manvolnum>5</manvolnum></citerefentry> for details.
156             </para>
157           </listitem>
158         </varlistentry>
160         <varlistentry>
161           <term>
162             SYSV init
163           </term>
164           <listitem>
165             <para>
166               Use a command like <command>ulimit -c 0|unlimited</command>
167               to disable or enable core files as required.  This
168               command can be put in the relevant distribution-specific
169               service configuration file.
170             </para>
171           </listitem>
172         </varlistentry>
174       </variablelist>
176     </refsect2>
178   </refsect1>
180   <refsect1>
181     <title>FILES</title>
183     <simplelist>
184       <member><filename>/etc/sysconfig/ctdb</filename></member>
185       <member><filename>/etc/default/ctdb</filename></member>
186       <member><filename>/usr/local/etc/ctdb/script.options</filename></member>
187     </simplelist>
188   </refsect1>
190   <refsect1>
191     <title>SEE ALSO</title>
192     <para>
193       <citerefentry><refentrytitle>ctdbd</refentrytitle>
194       <manvolnum>1</manvolnum></citerefentry>,
196       <citerefentry><refentrytitle>ctdb-script.options</refentrytitle>
197       <manvolnum>5</manvolnum></citerefentry>,
199       <citerefentry><refentrytitle>ctdb</refentrytitle>
200       <manvolnum>7</manvolnum></citerefentry>,
202       <ulink url="http://ctdb.samba.org/"/>
203     </para>
204   </refsect1>
206   <refentryinfo>
207     <author>
208       <contrib>
209         This documentation was written by
210         Martin Schwenke
211       </contrib>
212     </author>
214     <copyright>
215       <year>2007</year>
216       <holder>Andrew Tridgell</holder>
217       <holder>Ronnie Sahlberg</holder>
218     </copyright>
219     <legalnotice>
220       <para>
221         This program is free software; you can redistribute it and/or
222         modify it under the terms of the GNU General Public License as
223         published by the Free Software Foundation; either version 3 of
224         the License, or (at your option) any later version.
225       </para>
226       <para>
227         This program is distributed in the hope that it will be
228         useful, but WITHOUT ANY WARRANTY; without even the implied
229         warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
230         PURPOSE.  See the GNU General Public License for more details.
231       </para>
232       <para>
233         You should have received a copy of the GNU General Public
234         License along with this program; if not, see
235         <ulink url="http://www.gnu.org/licenses"/>.
236       </para>
237     </legalnotice>
238   </refentryinfo>
240 </refentry>