NAME

       slurmctld - The central management daemon of Slurm.

SYNOPSIS

       slurmctld [OPTIONS...]

DESCRIPTION

       slurmctld  is  the central management daemon of Slurm. It monitors all other Slurm daemons and resources,
       accepts work (jobs), and  allocates  resources  to  those  jobs.  Given  the  critical  functionality  of
       slurmctld,  there  may  be a backup server to assume these functions in the event that the primary server
       fails.

       OPTIONS

       -c     Clear all previous slurmctld state  from  its  last  checkpoint.   With  this  option,  all  jobs,
              including  both  running  and  queued, and all node states, will be deleted.  Without this option,
              previously running jobs will be preserved along with node State  of  DOWN,  DRAINED  and  DRAINING
              nodes  and  the  associated Reason field for those nodes.  NOTE: It is rare you would ever want to
              use this in production as all jobs will be killed.

       -d     Run slurmctld in the background.

       -D     Run slurmctld in the foreground with logging copied to stdout.

       -f <file>
              Read configuration from the specified file. See NOTES below.

       -h     Help; print a brief summary of command options.

       -i     Ignore errors found while reading in state files on startup.

       -L <file>
              Write log messages to the specified file.

       -n <value>
              Set the daemon's nice value to the specified value, typically a negative number.

       -r     Recover partial state from last checkpoint: jobs and node DOWN/DRAIN state and reason  information
              state.  No partition state is recovered.  This is the default action.

       -R     Recover  full  state  from last checkpoint: jobs, node, and partition state.  Without this option,
              previously running jobs will be preserved along with node State  of  DOWN,  DRAINED  and  DRAINING
              nodes  and  the  associated Reason field for those nodes. No other node or partition state will be
              preserved.

       -v     Verbose operation. Multiple -v's increase verbosity.

       -V     Print version information and exit.

ENVIRONMENT VARIABLES

       The following environment variables can be used to override settings compiled into slurmctld.

       SLURM_CONF          The location of the Slurm configuration file. This is overridden by explicitly naming
                           a configuration file on the command line.

CORE FILE LOCATION

       If slurmctld is started with the -D option then the core file will be  written  to  the  current  working
       directory.   Otherwise  if  SlurmctldLogFile  is a fully qualified path name (starting with a slash), the
       core file will be written to the same directory as the log file, provided SlurmUser has write  permission
       on  the directory.  Otherwise the core file will be written to the StateSaveLocation, or "/var/tmp/" as a
       last resort. If none of the above directories have write permission for SlurmUser, no core file  will  be
       produced.   The  command  "scontrol  abort" can be used to abort the slurmctld daemon and generate a core
       file.

NOTES

       It may be useful to experiment  with  different  slurmctld  specific  configuration  parameters  using  a
       distinct  configuration  file (e.g. timeouts).  However, this special configuration file will not be used
       by the slurmd daemon or the Slurm programs, unless you specifically tell each of them to use it.  If  you
       desire  changing communication ports, the location of the temporary file system, or other parameters used
       by other Slurm components, change the common configuration file, slurm.conf.

COPYING

       Copyright (C) 2002-2007 The Regents of the University of California.  Copyright  (C)  2008-2010  Lawrence
       Livermore  National  Security.   Produced  at  Lawrence  Livermore  National Laboratory (cf, DISCLAIMER).
       CODE-OCEC-09-009. All rights reserved.

       This   file   is   part   of   Slurm,   a   resource    management    program.     For    details,    see
       <https://slurm.schedmd.com/>.

       Slurm  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; either version 2 of the License, or (at your
       option) any later version.

       Slurm 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.

SEE ALSO

       slurm.conf(5), slurmd(8)

June 2018                                         Slurm Daemon                                      slurmctld(8)