NAME

       ctdbd - The CTDB cluster daemon

SYNOPSIS

       ctdbd [OPTION...]

DESCRIPTION

       ctdbd is the main CTDB daemon.

       Note that ctdbd is not usually invoked directly. It is invoked via ctdbd_wrapper(1) or via
       the initscript.

       See ctdb(7) for an overview of CTDB.

GENERAL OPTIONS

       -d, --debug=DEBUGLEVEL
           This option sets the debug level to DEBUGLEVEL, which controls what will be written by
           the logging subsystem. The default is 2.

           See the DEBUG LEVELS section in ctdb(7) for more information.

       --dbdir=DIRECTORY
           DIRECTORY on local storage where ctdbd keeps a local copy of TDB databases. This
           directory is local for each node and should not be stored on the shared cluster
           filesystem.

           Defaults to /var/lib/ctdb.

       --dbdir-persistent=DIRECTORY
           DIRECTORY on local storage where ctdbd keeps a local copy of persistent TDB databases.
           This directory is local for each node and should not be stored on the shared cluster
           filesystem.

           Defaults to /var/lib/ctdb/persistent.

       --dbdir-state=DIRECTORY
           DIRECTORY on local storage where ctdbd keep internal state TDB files. This directory
           is local for each node and should not be stored on the shared cluster filesystem.

           Defaults to /var/lib/ctdb/state.

       --event-script-dir=DIRECTORY
           DIRECTORY where the CTDB event scripts are stored. See the EVENT SCRIPTS section in
           ctdb(7) for more information.

           Default is CTDB_BASE/events.d, so usually /etc/ctdb/events.d, which is part of the
           CTDB installation.

       --listen=IPADDR
           IPADDR is the private IP address that ctdbd will bind to.

           By default ctdbd will select the first address from the nodes list that in can bind
           to. See also --nlist.

           This option is only required when automatic address detection can not be used. This
           can be the case when running multiple ctdbd daemons/nodes on the same physical host
           (usually for testing), using InfiniBand for the private network or on Linux when
           sysctl net.ipv4.ip_nonlocal_bind=1.

       --logging=STRING
           STRING specifies where ctdbd will write its log. The default is
           file:/var/log/ctdb/log.ctdb.

           Valid values are:

           file:FILENAME
               FILENAME where ctdbd will write its log. This is usually /var/log/ctdb/log.ctdb.

           syslog[:METHOD]
               CTDB will log to syslog. By default this will use the syslog(3) API.

               Under heavy loads syslog(3) can block if the syslog daemon processes messages too
               slowly. This can cause CTDB to block when logging.

               If METHOD is specified then it specifies an extension that causes logging to be
               done in a non-blocking mode. Note that this may cause messages to be dropped.
               METHOD must be one of:

               nonblocking
                   CTDB will log to syslog via /dev/log in non-blocking mode.

               udp
                   CTDB will log to syslog via UDP to localhost:514. The syslog daemon must be
                   configured to listen on (at least) localhost:514. Most syslog daemons will log
                   the messages with hostname "localhost" - this is a limitation of the
                   implementation, for compatibility with more syslog daemons.

               udp-rfc5424
                   As with "udp" but messages are sent in RFC5424 format. This method will log
                   the correct hostname but is not as widely implemented in syslog daemons.

       --max-persistent-check-errors=NUM
           NUM specifies the maximum number of health check failures allowed for persistent
           databases during startup.

           The default value is 0. Setting this to non-zero allows a node with unhealthy
           persistent databases to startup and join the cluster as long as there is another node
           with healthy persistent databases.

       --nlist=FILENAME
           FILENAME containing a list of the private IP addresses, one per line, for each node in
           the cluster. This file must be the same on each node in the cluster.

           Default is CTDB_BASE/nodes, so usually /etc/ctdb/nodes.

       --no-lmaster
           This argument specifies that this node can NOT become an lmaster for records in the
           database. This means that it will never show up in the vnnmap. This feature is
           primarily used for making a cluster span across a WAN link and use CTDB as a
           WAN-accelerator.

           Please see the REMOTE CLUSTER NODES section in ctdb(7) for more information.

       --no-recmaster
           This argument specifies that this node can NOT become a recmaster for the database.
           This feature is primarily used for making a cluster span across a WAN link and use
           CTDB as a WAN-accelerator.

           Please see the REMOTE CLUSTER NODES section in ctdb(7) for more information.

       --notification-script=FILENAME
           FILENAME specifying a script to be invoked by ctdbd when certain state changes occur.

           This file is usually /etc/ctdb/notify.sh.

           Please see the NOTIFICATION SCRIPT section in ctdb(7) for more information.

       --pidfile=FILENAME
           FILENAME for file containing process ID of main CTDB daemon. This file is
           automatically created and removed by CTDB.

           The default is to not create a PID file.

       --public_addresses=FILENAME
           FILENAME specifying a file containing the public IP addresses to use on the cluster
           when CTDB should use IP takeover. This file contains a list of IP addresses, netmasks
           and interfaces. CTDB will distribute these public IP addresses appropriately across
           the available nodes.

           The IP addresses specified in this file can differ across nodes.

           This is usually the file /etc/ctdb/public_addresses

       --public-interface=INTERFACE
           Default INTERFACE on which to attach public IP addresses.

           When using public IP addresses, this is only required if interfaces are not explicitly
           specified in the public addresses file.

       --reclock=LOCK
           LOCK specifies the cluster-wide mutex used to detect and prevent a partitioned cluster
           (or "split brain").

           For information about the recovery lock please see the RECOVERY LOCK section in
           ctdb(7).

       --start-as-disabled
           This makes ctdbd start in the DISABLED state.

           To allow the node to host public IP addresses and services, it must be manually
           enabled using the ctdb enable command.

           Please see the NODE STATES section in ctdb(7) for more information about the DISABLED
           state.

       --start-as-stopped
           This makes ctdbd start in the STOPPED state.

           To allow the node to take part in the cluster it must be manually continued with the
           the ctdb enable command.

           Please see the NODE STATES section in ctdb(7) for more information about the STOPPED
           state.

       --transport=tcp|infiniband
           This option specifies which transport to use for ctdbd internode communications. The
           default is "tcp".

           The "infiniband" support is not regularly tested.

       -?, --help
           Display a summary of options.

DEBUGGING OPTIONS

       -i, --interactive
           Enable interactive mode. This will make ctdbd run in the foreground and not detach
           from the terminal. By default ctdbd will detach itself and run in the background as a
           daemon.

       --nopublicipcheck
           This option is used when testing with multiple local daemons on a single machine. It
           disables checks related to public IP addresses.

       --nosetsched
           This is a debugging option. This option is only used when debugging ctdbd.

           Normally ctdbd will change its scheduler to run as a real-time process. This is the
           default mode for a normal ctdbd operation to gurarantee that ctdbd always gets the CPU
           cycles that it needs.

           This option is used to tell ctdbd to not run as a real-time process and instead run
           ctdbd as a normal userspace process. This is useful for debugging and when you want to
           run ctdbd under valgrind or gdb. (You don't want to attach valgrind or gdb to a
           real-time process.)

       --socket=FILENAME
           FILENAME specifies the name of the Unix domain socket that ctdbd will create. This
           socket is used by local clients to communicate with ctdbd.

           The default is /var/run/ctdb/ctdbd.socket. You only need to use this option if you
           plan to run multiple ctdbd daemons on the same physical host, usually for testing.

       --script-log-level=DEBUGLEVEL
           This option sets the debug level of event script output to DEBUGLEVEL. The default is
           ERR.

           See the DEBUG LEVELS section in ctdb(7) for more information.

       --sloppy-start
           This is debugging option. This speeds up the initial recovery during startup at the
           expense of some consistency checking.  Don't use this option in production.

       --torture
           This option is only used for development and testing of CTDB. It adds artificial
           errors and failures to the common codepaths in ctdbd to verify that ctdbd can recover
           correctly from failures.

           Do not use this option unless you are developing and testing new functionality in
           CTDB.

       --valgrinding
           This is a debugging option. This option is only used when debugging ctdbd. This
           enables additional debugging capabilities and implies --nosetsched.

SEE ALSO

       ctdb(1), ctdbd_wrapper(1), onnode(1), ctdb(7), ctdb-tunables(7), http://ctdb.samba.org/

AUTHOR

       This documentation was written by Ronnie Sahlberg, Amitay Isaacs, 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.