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) 2023 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

SEE ALSO

       mfsmaster(8), mfsmetalogger.cfg(5)

MooseFS 3.0.117-1                                 February 2023                                 mfsmetalogger(8)