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mfsmaster(8) This is part of MooseFS mfsmaster(8) NAME mfsmaster - start, restart or stop MooseFS master process SYNOPSIS mfsmaster [-c CFGFILE] [-f] [-d] [-u] [-n] [-i] [-a] [-e] [-x[x]] [-t LOCK- TIMEOUT] [ACTION] mfsmaster -v mfsmaster -h DESCRIPTION mfsmaster is the master program of MooseFS. OPTIONS -v print version information and exit -h print usage information and exit -c CFGFILE specify alternative path of configuration file (default is mfsmas- ter.cfg in system configuration directory) -f run in foreground, don't daemonize -d run with dangerous options (names: DANGEROUS_*) -u log undefined configuration values (when default is assumed) -n do not attempt to increase limit of core dump size -i ignore some metadata structure errors -a automatically restore metadata from change logs -e (pro only) start without metadata (used to start additional masters) -x produce more verbose output -xx even more verbose output -t LOCKTIMEOUT how long to wait for lockfile (in seconds; default is 1800 seconds) ACTION tells master to perform one of the following actions: start Start master process if the process is not already running, otherwise display error message. stop Stop master process if the process is running, otherwise display error message. restart (default action) If the master process is running, restart it, if it's not running, start it. reload Send a signal to master process to reload config files. info Send a signal to master process to dump debug information file in working directory. test Displays "mfsmaster pid: PID" if the master is running (and return 0) or "mfsmaster is not running" otherwise (and re- turn 1). kill Send termination signal to master process. restore Restore current metadata file using backup metadata and changelog files (if possible, i.e. if correct files exist), write it to working directory and exit. FILES mfsmaster.cfg configuration file for MooseFS master process; refer to mfsmas- ter.cfg(5) manual for details mfsexports.cfg MooseFS access control file; refer to mfsexports.cfg(5) manual for details mfstopology.cfg Network topology definitions; refer to mfstopology.cfg(5) manual for details mfsipmap.cfg Chunkservers IP mapping definitions; refer to mfsipmap.cfg(5) manual for details .mfsmaster.lock lock file of running MooseFS master process (created in data direc- tory) .bgwriter.lock lock file of running MooseFS master subprocess for storing metadata (created in data directory) metadata.mfs, metadata.mfs.back MooseFS filesystem metadata image (created in data directory) metadata.crc CRC of metadata.mfs file (created in data directory) metadata.mfs.empty An empty metadata file, to be used when starting up a fresh MooseFS instance (created in data directory) changelog.*.mfs MooseFS filesystem metadata change logs (created in data directory) stats.mfs master charts stats (created in data directory) .mfsmaster_info.txt master info file, created by sending the process INFO signal, with work parameters that can be used for debugging/support purposes (created in data directory) REPORTING BUGS Report bugs to <bugs@moosefs.com>. COPYRIGHT Copyright (C) 2026 Jakub Kruszona-Zawadzki, Saglabs SA This file is part of MooseFS. MooseFS 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 Soft- ware Foundation, version 2 (only). MooseFS 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 de- tails. You should have received a copy of the GNU General Public License along with this program; if not, see <https://www.gnu.org/licenses/>. SEE ALSO mfschunkserver(8), mfsmount(8), mfsmaster.cfg(5), mfsexports.cfg(5), mf- stopology.cfg(5) MooseFS 4.59.1-1 May 2026 mfsmaster(8)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | FILES | REPORTING BUGS | COPYRIGHT | SEE ALSO
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