NAME

       mfsmetalogger - start, restart or stop Moose File System metalogger process

SYNOPSIS

       mfsmetalogger [-f] [-c CFGFILE] [-u] [-d] [-t LOCKTIMEOUT] [ACTION]

       mfsmetalogger -s [-c CFGFILE]

       mfsmetalogger -v

       mfsmetalogger -h

DESCRIPTION

       mfsmetalogger  is  the  metadata  replication  server  of Moose File System.  Depending on
       parameters it can start, restart or stop MooseFS metalogger process.  Without any  options
       it starts MooseFS metalogger, killing previously run process if lock file exists.

       SIGHUP (or 'reload' ACTION) forces mfsmetalogger to reload all configuration files.

       mfsmetalogger exists since 1.6.5 version of MooseFS; before this version mfschunkserver(8)
       was responsible of logging metadata changes.

       -v     print version information and exit

       -h     print usage information and exit

       -f     (deprecated, use start action instead)  forcily  run  MooseFS  metalogger  process,
              without  trying  to  kill  previous  instance  (this  option  allows to run MooseFS
              metalogger if stale PID file exists)

       -s     (deprecated, use stop action instead) stop MooseFS metalogger process

       -c CFGFILE
              specify alternative path of configuration file  (default  is  mfsmetalogger.cfg  in
              system configuration directory)

       -u     log undefined configuration values (when default is assumed)

       -d     run in foreground, don't daemonize

       -t LOCKTIMEOUT
              how long to wait for lockfile (default is 60 seconds)

       ACTION is the one of start, stop, restart, reload, test or kill. Default action is restart
              unless -s (stop) or -f (start) option is given.  Note that -s and  -f  options  are
              deprecated,  likely  to  disappear  and  ACTION  parameter  to become obligatory in
              MooseFS 1.7.

FILES

       mfsmetalogger.cfg
              configuration file for MooseFS metalogger process;  refer  to  mfsmetalogger.cfg(5)
              manual for details

       mfsmetalogger.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.

REPORTING BUGS

       Report bugs to <bugs@moosefs.com>.

COPYRIGHT

       Copyright (C) 2021 Jakub Kruszona-Zawadzki, Core Technology Sp. z o.o.

       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

SEE ALSO

       mfsmaster(8), mfsmetalogger.cfg(5)