mfsmetalogger.cfg(5)

NAME
mfsmetalogger.cfg - configuration file for mfsmetalogger

DESCRIPTION
The file mfsmetalogger.cfg contains configuration of MooseFS metalogger process.

SYNTAX

Syntax is:

OPTION = VALUE

Lines starting with # character are ignored as comments.

  STARTUP OPTIONS
Changes in this section require process restart.

WORKING_USER
    user to run daemon as

WORKING_GROUP
    group to run daemon as (optional - if empty then default user group will be used)

SYSLOG_IDENT
    name of process to place in syslog messages (default is mfsmetalogger)

LOCK_MEMORY
    whether to perform mlockall() to avoid swapping out mfsmetalogger process (default is 0, i.e. no)

LIMIT_GLIBC_MALLOC_ARENAS
    limit malloc arenas to given value - prevents server from using huge amount of virtual memory (Linux only, default is 4)

DISABLE_OOM_KILLER
    disable out of memory killer (Linux only, default is 1)

NICE_LEVEL
    nice level to run daemon with (default is -19 if possible; note: process must be started as root to increase priority)

FILE_UMASK
    set default umask for group and others; user has always 0; default is 027 - block write for group and block all for others

DATA_PATH
    where to store metadata files

  RUNTIME OPTIONS
Changes in this section require only process reload.

BACK_LOGS
    number of metadata change log files (default is 50)

BACK_META_KEEP_PREVIOUS
    number of previous metadata files to be kept (default is 3)

META_DOWNLOAD_FREQ
    metadata download frequency in hours (default is 24, at most BACK_LOGS/2)

SYSLOG_MIN_LEVEL
    minimum level of messages that will be reported by matalogger; levels in order of importance: ERROR, WARNING, NOTICE, INFO, DEBUG (default is INFO)

SYSLOG_ELEVATE_TO
    reported messages of level lower than set by this option will be elevated to this level (i.e. if SYSLOG_MIN_LEVEL is set to DEBUG and SYSLOG_ELEVATE_TO is set to NOTICE, all INFO and DEBUG messages will be sent to syslog as NOTICE ; default is NOTICE)

  MASTER CONNECTION OPTIONS
Changes in this section require only process reload.

MASTER_RECONNECTION_DELAY
    delay in seconds before trying to reconnect to master after disconnection (default is 5)

BIND_HOST
    local address to use for master connections; default is *, i.e. default local address

MASTER_HOST
    address of MooseFS master host to connect with (default is mfsmaster)

MASTER_PORT
    number of MooseFS master port to connect with (default is 9419)

MASTER_TIMEOUT
    timeout (in seconds) for master connections (default is 10)

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 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 this program; if not, see <https://www.gnu.org/licenses/>.

SEE ALSO
mfsmetalogger(8)