mfschunkserver

NAME

mfschunkserver - start, restart or stop MooseFS chunkserver process

SYNOPSIS

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

mfschunkserver -v

mfschunkserver -h

DESCRIPTION

mfschunkserver is the data server of MooseFS.

OPTIONS

-v

print version information and exit

-h

print usage information and exit

-f

run in foreground, don't daemonize

-d

run with dangerous options (names: DANGEROUS_*)

-u

log undefined configuration values (when default is assumed)

-n

do not attempt to increase limit of core dump size

-t LOCKTIMEOUT

how long to wait for lockfile (in seconds; default is 60 seconds)

-c CFGFILE

specify alternative path of configuration file (default is mfschunkserver.cfg in system configuration directory)

-o OPTIONOVERRIDE

override a config option - see NOTES

ACTION

tells chunkserver to perform one of the following actions:

start: Start chunkserver process if the process is not already running, otherwise display error message.
stop: Stop chunkserver process if the process is running, otherwise display error message.
restart: (default action) If the chunkserver process is running, restart it, if it's not running, start it.
reload: Send a signal to chunkserver process to reload config files.
info: Send a signal to chunkserver process to dump debug information file in working directory.
test: Displays "mfschunkserver pid: PID" if the chunkserver is running (and return 0) or "mfschunkserver is not running" otherwise (and return 1).
kill: Send termination signal to chunkserver process.
restore: Not implemented.

FILES

mfschunkserver.cfg: configuration file for MooseFS chunkserver process; refer to mfschunkserver.cfg (5) manual for details
mfshdd.cfg: list of directories (mountpoints) used for MooseFS storage; refer to mfshdd.cfg (5) manual for details
.mfschunkserver.lock: lock file of running MooseFS chunkserver process (created in data directory)
chunkserverid.mfs: chunkserver ID, assigned by MooseFS master during first connection (created in data directory)
csstats.mfs: chunkserver charts stats (created in data directory)
.mfschunkserver_info.txt: chunkserver info file, created by sending the process INFO signal, with work parameters that can be used for debugging/support purposes (created in data directory)

NOTES

All MooseFS daemons, including mfschunkserver, can read configuration options from 3 sources. These sources are, in order from the most important, to the least important:
- option overrides provided in commandline as arguments
- options defined in environment variables
- options defined in the daemon's main config file (mfschunkserver.cfg for mfschunkserver process).

All possible configuration options are described in the manpage for the mfschunkserver.cfg(5) file. Options provided in commandline are the same as in the config file (e.g. running the mfschunkserver with -o HDD_TEST_SPEED=5 will change this chunkserver's background chunk tests speed to 5 Mb/s). Options provided in environment must be prefixed with "MFSCFG_" (e.g setting MFSCFG_HDD_TEST_SPEED to 5 in environment will change this chunkserver's background chunk tests speed to 5 Mb/s if HDD_TEST_SPEED is not overriden in commandline).

REPORTING BUGS

Report bugs to bugs@moosefs.com

COPYRIGHT

This file is part of MooseFS.

READ THIS BEFORE INSTALLING THE SOFTWARE. BY INSTALLING, ACTIVATING OR USING THE SOFTWARE, YOU ARE AGREEING TO BE BOUND BY THE TERMS AND CONDITIONS OF MooseFS LICENSE AGREEMENT FOR VERSION 1.7 AND HIGHER IN A SEPARATE FILE. THIS SOFTWARE IS LICENSED AS PROPRIETARY SOFTWARE. YOU DO NOT ACQUIRE ANY OWNERSHIP RIGHT, TITLE OR INTEREST IN OR TO ANY INTELLECTUAL PROPERTY OR OTHER PROPRIETARY RIGHTS.