mfschunkserver(8) - Linux man page

Name

mfschunkserver - start, restart or stop Moose File System chunkserver process

Synopsis

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

mfschunkserver -s [-c CFGFILE]

mfschunkserver -v

mfschunkserver -h

Description

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

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

Starting with version 1.6.0 chunkserver periodically tests stored chunks (see HDD_TEST_FREQ option in mfschunkserver.cfg(5) manual).

Starting with version 1.6.5 MooseFS master doesn't send metadata change logs to chunkserver and expect at least one mfsmetalogger(8) daemon to connect.

Starting with version 1.6.26 chunkserver scans attached disks in background.

-v: print version information and exit
-h: print usage information and exit
-f: (deprecated, use start action instead) forcily run MooseFS chunkserver process, without trying to kill previous instance (this option allows to run MooseFS chunkserver if stale PID file exists)
-s: (deprecated, use stop action instead) stop MooseFS chunkserver process
-c CFGFILE: specify alternative path of configuration file (default is mfschunkserver.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

mfschunkserver.cfg

configuration file for MooseFS chunkserver process; refer to mfschunkserver.cfg(5) manual for defails

mfshdd.cfg

list of directories (mountpoints) used for MooseFS storage (one per line; directory prefixed by * character causes given directory to be freed by replicating all data already stored there to another locations)

mfschunkserver.lock

PID file of running MooseFS chunkserver process (created in RUN_PATH by MooseFS < 1.6.9) ..

lock file of running MooseFS chunkserver process (created in data directory since MooseFS 1.6.9)

changelog_csback.*.mfs

MooseFS filesystem metadata change logs (backup of master change log files; used only with MooseFS master < 1.6.5)

data.csstats

Chunkserver charts state

Reporting Bugs

Report bugs to <bugs@moosefs.com>.

Copyright

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 3.

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, see <http://www.gnu.org/licenses/>.