    \fBslurmctld\fR 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 \fBslurmctld\fR,
    there may be a backup server to assume these functions in the event that
    the primary server fails.
    .TP
    OPTIONS

    .TP
    \fB\-c\fR
    Clear all previous \fBslurmctld\fR 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 \fIState\fR of DOWN, DRAINED
    and DRAINING nodes and the associated \fIReason\fR field for those nodes.
    NOTE: It is rare you would ever want to use this in production as all
    jobs will be killed.

    .TP
    \fB\-d\fR
    Run \fBslurmctld\fR in the background.
    .TP
    \fB\-D\fR
    Run \fBslurmctld\fR in the foreground with logging copied to stdout.
    .TP
    \fB\-f <file>\fR
    Read configuration from the specified file. See \fBNOTES\fR below.
    .TP
    \fB\-h\fR
    Help; print a brief summary of command options.
    .TP
    \fB\-i\fR
    Ignore errors found while reading in state files on startup.
    Warning: Use of this option will mean losing the data that wasn't recovered
    from the state files.
    .TP
    \fB\-L <file>\fR
    Write log messages to the specified file.

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

    .TP
    \fB\-r\fR
    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.

    .TP
    \fB\-R\fR
    Recover full state from last checkpoint: jobs, node, and partition state.
    compiled into slurmctld.
    .TP 20
    \fBSLURM_CONF\fR
    The location of the Slurm configuration file. This is overridden by
    explicitly naming a configuration file on the command line.

    .SH "CORE FILE LOCATION"
    If slurmctld is started with the \fB\-D\fR option then the core file will be
    written to the current working directory.
    Otherwise if \fBSlurmctldLogFile\fR 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 \fBStateSaveLocation\fR,
    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.

    .SH "SIGNALS"
    .TP
    \fBSIGTERM SIGINT\fR
    \fBslurmctld\fR will shutdown cleanly, saving its current state to the state
    save directory.
    .TP
    \fBSIGABRT\fR
    \fBslurmctld\fR will shutdown cleanly, saving its current state, and perform a
    core dump.
    .TP
    \fBSIGHUP\fR
    Reloads the slurm configuration files, similar to 'scontrol reconfigure'.
    .TP
    \fBSIGUSR2\fR
    Reread the log level from the configs, and then reopen the log file.  This
    should be used when setting up \fBlogrotate\fR(8).
    .TP
    \fBSIGCHLD SIGUSR1 SIGTSTP SIGXCPU SIGQUIT SIGPIPE SIGALRM\fR
    These signals are explicitly ignored.

    .SH "NOTES"
    It may be useful to experiment with different \fBslurmctld\fR specific
    configuration parameters using a distinct configuration file
    (e.g. timeouts).  However, this special configuration file will not be
    used by the \fBslurmd\fR 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, \fBslurm.conf\fR.

    .SH "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).

    .SH "SEE ALSO"
    \fBslurm.conf\fR(5), \fBslurmd\fR(8)