mfsmetalogger - start, restart or stop MooseFS metalogger process

       Copyright (C) 2025 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 Software 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 details.

       You  should  have  received a copy of the GNU General Public License along with MooseFS; if not, write to
       the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,  MA  02111-1301,  USA  or  visit
       http://www.gnu.org/licenses/gpl-2.0.html

mfsmetalogger is the metadata replication server of MooseFS.

mfsmetalogger.cfg
              configuration  file  for  MooseFS  metalogger  process;  refer  to mfsmetalogger.cfg(5)manualfordetailsmfsmetalogger.lock
              PID file of running MooseFS metalogger process (created in RUN_PATH by MooseFS < 1.6.9)

       .mfsmetalogger.lock
              lock file of running MooseFS metalogger process (created in data directory since MooseFS 1.6.9)

       changelog_ml.*.mfs
              MooseFS filesystem metadata change logs (backup of master change log files)

       metadata.ml.mfs.back
              Latest copy of complete metadata.mfs.back file from MooseFS master.

       sessions.ml.mfs
              Latest copy of sessions.mfs file from MooseFS master.

       mfsmetalogger - start, restart or stop MooseFS metalogger process

-v     print version information and exit

       -h     print usage information and exit

       -cCFGFILE
              specify   alternative   path  of  configuration  file  (default  is  mfsmetalogger.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

       -tLOCKTIMEOUT
              how long to wait for lockfile (in seconds; default is 60 seconds)

       ACTION tells metalogger to perform one of the following actions:

              start    Start metalogger process if the process is not already running, otherwise  display  error
                       message.

              stop     Stop metalogger process if the process is running, otherwise display error message.

              restart  (default  action)  If the metalogger process is running, restart it, if it's not running,
                       start it.

              reload   Send a signal to metalogger process to reload config files.

              info     Send a singal to metalogger process to dump debug information file in working directory.

              test     Displays "mfsmetalogger pid: PID"  if  the  metalogger  is  running  (and  return  0)  or
                       "mfsmetalogger is not running" otherwise (and return 1).

              kill     Send termination signal to metalogger process.

              restore  Not implemented.

       Report bugs to <bugs@moosefs.com>.

mfsmaster(8), mfsmetalogger.cfg(5)

MooseFS 4.57.5-1                                  February 2025                                 mfsmetalogger(8)

mfsmetalogger [-cCFGFILE] [-f] [-d] [-u] [-n] [-tLOCKTIMEOUT] [ACTION]

       mfsmetalogger-vmfsmetalogger-h