.TH mfsmetalogger "8" "August 2021" "MooseFS 3.0.116-1" "This is part of MooseFS"
.SH NAME
mfsmetalogger \- start, restart or stop Moose File System metalogger process
.SH SYNOPSIS
.B mfsmetalogger
[\fB\-f\fP]
[\fB\-c\fP \fICFGFILE\fP] [\fB\-u\fP]
[\fB\-d\fP]
[\fB\-t\fP\fI LOCKTIMEOUT\fP]
[\fIACTION\fP]
.PP
.B mfsmetalogger \-s
[\fB\-c\fP \fICFGFILE\fP]
.PP
.B mfsmetalogger \-v
.PP
.B mfsmetalogger \-h
.SH DESCRIPTION
.PP
\fBmfsmetalogger\fP 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.
.PP
SIGHUP (or 'reload' \fIACTION\fP) forces \fBmfsmetalogger\fP to reload all configuration files.
.PP
mfsmetalogger exists since 1.6.5 version of MooseFS; before this version
\fBmfschunkserver\fP\|(8) was responsible of logging metadata changes.
.TP
\fB\-v\fP
print version information and exit
.TP
\fB\-h\fP
print usage information and exit
.TP
\fB\-f\fP
(deprecated, use \fBstart\fP 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)
.TP
\fB\-s\fP
(deprecated, use \fBstop\fP action instead)
stop MooseFS metalogger process
.TP
\fB\-c\fP \fICFGFILE\fP
specify alternative path of configuration file (default is
\fBmfsmetalogger.cfg\fP in system configuration directory)
.TP
\fB\-u\fP
log undefined configuration values (when default is assumed)
.TP
\fB\-d\fP
run in foreground, don't daemonize
.TP
\fB\-t\fP \fILOCKTIMEOUT\fP
how long to wait for lockfile (default is 60 seconds)
.TP
\fIACTION\fP
is the one of \fBstart\fP, \fBstop\fP, \fBrestart\fP, \fBreload\fP, \fBtest\fP or \fBkill\fP. Default action is
\fBrestart\fP unless \fB\-s\fP (stop) or \fB\-f\fP (start) option is given.
Note that \fB\-s\fP and \fB\-f\fP options are deprecated, likely to disappear
and \fIACTION\fP parameter to become obligatory in MooseFS 1.7.
.SH FILES
.TP
\fBmfsmetalogger.cfg\fP
configuration file for MooseFS metalogger process; refer to
\fBmfsmetalogger.cfg\fI\|(5) manual for details
.TP
\fBmfsmetalogger.lock\fP
PID file of running MooseFS metalogger process
(created in RUN_PATH by MooseFS < 1.6.9)
.TP
.BR .mfsmetalogger.lock
lock file of running MooseFS metalogger process
(created in data directory since MooseFS 1.6.9)
.TP
\fBchangelog_ml.\fP*\fB.mfs\fP
MooseFS filesystem metadata change logs (backup of master change log files)
.TP
\fBmetadata.ml.mfs.back\fP
Latest copy of complete metadata.mfs.back file from MooseFS master.
.TP
\fBsessions.ml.mfs\fP
Latest copy of sessions.mfs file from MooseFS master.
.SH "REPORTING BUGS"
Report bugs to <bugs@moosefs.com>.
.SH 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
.SH "SEE ALSO"
.BR mfsmaster (8),
.BR mfsmetalogger.cfg (5)