ctdb.sysconfig - Man Page
CTDB daemon configuration file
Description
This file contains configuration that affects the operation of CTDB. This is a distribution-specific service configuration file such as /etc/sysconfig/ctdb (Red Hat) or /etc/default/ctdb (Debian) and is a shell script (see sh(1)).
Global Configuration
- CTDB_PLATFORM_STYLE=debian|redhat|suse|freebsd
This characterises the Linux distribution (or other operating system) being used. This is usually determined dynamically by checking the system. This variable is used by:
- The initscript to determine which init system primitives to use.
- Some event scripts to determine services names, since these can vary between distributions.
- Some shell functions to determine which options to use for certain commands.
If using CTDB's event scripts are unable to determine an appropriate default then this option can also be placed in a relevant ctdb-script.options(5) file.
Default: Based on contents of /etc/os-release.
Resource Limits
Maximum number of open files
CTDB can use a lot of file descriptors, especially when used with Samba. If there are thousands of smbd processes connected to CTDB when this can mean that thousands of file descriptors are used. For CTDB, it is often necessary to increase limit on the maximum number of open files.
The maximum number of open files should be configured using an operating system mechanism.
- systemd
The LimitNOFILE=LIMIT option can be used in a unit/service file increase the maximum number of open files. See systemd.exec(5) for details.
- SYSV init
Use a command like ulimit -n LIMIT to increase the maximum number of open files. This command can be put in the relevant distribution-specific service configuration file.
Allowing core dumps
Many distributions do not allow core dump files to be generated by default. To assist with debugging, core files can be enabled. This should be configured using an operating system mechanism.
- systemd
The LimitCORE=0|unlimited option can be used in a unit/service file. 0 disallows core files, unlimited allows them. maximum number of open files. See systemd.exec(5) for details.
- SYSV init
Use a command like ulimit -c 0|unlimited to disable or enable core files as required. This command can be put in the relevant distribution-specific service configuration file.
Files
/etc/sysconfig/ctdb
/etc/default/ctdb
/etc/ctdb/script.options
See Also
ctdbd(1), ctdb-script.options(5), ctdb(7), http://ctdb.samba.org/
Author
This documentation was written by Martin Schwenke
Copyright
Copyright © 2007 Andrew Tridgell, Ronnie Sahlberg
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, see http://www.gnu.org/licenses.