scancel - Online in the Cloud

PROGRAM:

NAME

scancel - Used to signal jobs or job steps that are under the control of Slurm.

SYNOPSIS

scancel [OPTIONS...] [job_id[_array_id][.step_id]] [job_id[_array_id][.step_id]...]

DESCRIPTION

scancel is used to signal or cancel jobs, job arrays or job steps. An arbitrary number of
jobs or job steps may be signaled using job specification filters or a space separated
list of specific job and/or job step IDs. If the job ID of a job array is specified with
an array ID value then only that job array element will be cancelled. If the job ID of a
job array is specified without an array ID value then all job array elements will be
cancelled. A job or job step can only be signaled by the owner of that job or user root.
If an attempt is made by an unauthorized user to signal a job or job step, an error
message will be printed and the job will not be signaled.

OPTIONS

-A, --account=account
Restrict the scancel operation to jobs under this charge account.

-b, --batch
Signal only the batch step (the shell script), but not any other steps nor any
children of the shell script. This is useful when the shell script has to trap the
signal and take some application defined action. This is not applicable if step_id
is specified. NOTE: The shell itself may exit upon receipt of many signals. You
may avoid this by explicitly trap signals within the shell script (e.g. "trap <arg>
<signals>"). See the shell documentation for details. Also see the -f, --full
option.

--ctld Send the job signal request to the slurmctld daemon rather than directly to the
slurmd daemons. This increases overhead, but offers better fault tolerance. This
is the default behavior on architectures using front end nodes (e.g. BlueGene and
Cray computers) or when the --clusters option is used.

-f, --full
Signal all steps associated with the job including any batch step (the shell script
plus all of its child processes). By default, signals other than SIGKILL are not
sent to the batch step. Also see the -b, --batch option.

--help Print a help message describing all scancel options.

-i, --interactive
Interactive mode. Confirm each job_id.step_id before performing the cancel
operation.

-M, --clusters=<string>
Cluster to issue commands to.

-n, --jobname=job_name, --name=job_name
Restrict the scancel operation to jobs with this job name.

-p, --partition=partition_name
Restrict the scancel operation to jobs in this partition.

-q, --qos=qos
Restrict the scancel operation to jobs with this quality of service.

-Q, --quiet
Do not report an error if the specified job is already completed. This option is
incompatible with the --verbose option.

-R, --reservation=reservation_name
Restrict the scancel operation to jobs with this reservation name.

-s, --signal=signal_name
The name or number of the signal to send. If this option is not used the specified
job or step will be terminated. Note. If this option is used the signal is sent
directly to the slurmd where the job is running bypassing the slurmctld thus the
job state will not change even if the signal is delivered to it. Use the scontrol
command if you want the job state change be known to slurmctld.

-t, --state=job_state_name
Restrict the scancel operation to jobs in this state. job_state_name may have a
value of either "PENDING", "RUNNING" or "SUSPENDED".

-u, --user=user_name
Restrict the scancel operation to jobs owned by this user.

--usage
Print a brief help message listing the scancel options.

-v, --verbose
Print additional logging. Multiple v's increase logging detail. This option is
incompatible with the --quiet option.

-V, --version
Print the version number of the scancel command.

-w, --nodelist=host1,host2,...
Cancel any jobs using any of the given hosts. The list may be specified as a
comma-separated list of hosts, a range of hosts (host[1-5,7,...] for example), or a
filename. The host list will be assumed to be a filename only if it contains a "/"
character.

--wckey=wckey
Restrict the scancel operation to jobs using this workload characterization key.

ARGUMENTS

job_id The Slurm job ID to be signaled.

step_id
The step ID of the job step to be signaled. If not specified, the operation is
performed at the level of a job.

If neither --batch nor --signal are used, the entire job will be terminated.

When --batch is used, the batch shell processes will be signaled. The child
processes of the shell will not be signalled by Slurm, but the shell may forward
the signal.

When --batch is not used but --signal is used, then all job steps will be
signalled, but the batch script itself will not be signalled.

ENVIRONMENT VARIABLES

Some scancel options may be set via environment variables. These environment variables,
along with their corresponding options, are listed below. (Note: commandline options will
always override these settings)

SCANCEL_ACCOUNT -A, --account=account

SCANCEL_BATCH -b, --batch

SCANCEL_CTLD --ctld

SCANCEL_FULL -f, --full

SCANCEL_INTERACTIVE -i, --interactive

SCANCEL_NAME -n, --name=job_name

SCANCEL_PARTITION -p, --partition=partition_name

SCANCEL_QOS -q, --qos=qos

SCANCEL_STATE -t, --state=job_state_name

SCANCEL_USER -u, --user=user_name

SCANCEL_VERBOSE -v, --verbose

SCANCEL_WCKEY --wckey=wckey

SLURM_CONF The location of the Slurm configuration file.

NOTES

If multiple filters are supplied (e.g. --partition and --name) only the jobs satisfying
all of the filtering options will be signaled.

Cancelling a job step will not result in the job being terminated. The job must be
cancelled to release a resource allocation.

To cancel a job, invoke scancel without --signal option. This will send first a SIGCONT
to all steps to eventually wake them up followed by a SIGTERM, then wait the KillWait
duration defined in the slurm.conf file and finally if they have not terminated send a
SIGKILL. This gives time for the running job/step(s) to clean up.

If a signal value of "KILL" is sent to an entire job, this will cancel the active job
steps but not cancel the job itself.

On Cray systems, all signals except SIGCHLD, SIGCONT, SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU,
SIGURG, or SIGWINCH cause the ALPS reservation to be released. The job however will not
be terminated except in the case of SIGKILL and may then be used for post processing.

AUTHORIZATION

When using the Slurm db, users who have AdminLevel's defined (Operator or Admin) and users
who are account coordinators are given the authority to invoke scancel on other user's
jobs.

EXAMPLES

Send SIGTERM to steps 1 and 3 of job 1234:
scancel --signal=TERM 1234.1 1234.3

Cancel job 1234 along with all of its steps:
scancel 1234

Send SIGKILL to all steps of job 1235, but do not cancel the job itself:
scancel --signal=KILL 1235

Send SIGUSR1 to the batch shell processes of job 1236:
scancel --signal=USR1 --batch 1236

Cancel job all pending jobs belonging to user "bob" in partition "debug":
scancel --state=PENDING --user=bob --partition=debug

Cancel only array ID 4 of job array 1237
scancel 1237_4

COPYING

Copyright (C) 2002-2007 The Regents of the University of California. Produced at Lawrence
Livermore National Laboratory (cf, DISCLAIMER).
Copyright (C) 2008-2011 Lawrence Livermore National Security.
Copyright (C) 2010-2015 SchedMD LLC.

This file is part of Slurm, a resource management program. For details, see
<http://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.

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