---
name: "mfsmetalogger.cfg"
section: "5"
platform: "linux"
package: "moosefs"
version: "4.59.2-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/mfsmetalogger.cfg"
---

# mfsmetalogger.cfg(5)

configuration file for mfsmetalogger

## 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)](/mfsmetalogger/8.md)