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

Provided by: slurm-client_21.08.5-2ubuntu1_amd64

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.  While a heterogeneous job is in a PENDING state, only the entire  job  can  be
       cancelled  rather  than  its  individual  components.   A  request to cancel an individual
       component of a heterogeneous job while in a PENDING state will return an error.  After the
       job  has begun execution, an individual component can 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
By default, signals other than SIGKILL are not sent to the batch step (the shell
script). With this option scancel signals only the batch step, but not any other
steps. This is useful when the shell script has to trap the signal and take some
application defined action. Note that most shells cannot handle signals while a
command is running (child process of the batch step), the shell use to wait until
the command ends to then handle the signal. Children of the batch step are not
signaled with this option, use -f, --full instead. NOTE: If used with -f, --full,
this option ignored. NOTE: This option 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.

-M, --clusters=<string>
Cluster to issue commands to. Implies --ctld. Note that the SlurmDBD must be up
for this option to work properly.

--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. Cray ALPS
computers) or when the --clusters option is used.

-f, --full
By default, signals other than SIGKILL are not sent to the batch step (the shell
script). With this option scancel signals also the batch script and its children
processes. Most shells cannot handle signals while a command is running (child
process of the batch step), the shell use to wait until the command ends to then
handle the signal. Unlike -b, --batch, children of the batch step are also signaled
with this option. NOTE: srun steps are also children of the batch step, so steps
are also signaled with this option.

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

-H, --hurry
Do not stage out any burst buffer data.

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

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

-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.

-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.

--sibling=cluster_name
Remove an active sibling job from a federated job.

-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".

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

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

-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.

--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 signaled by Slurm, but the shell may forward the
              signal.

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

PERFORMANCE

       Executing scancel sends a remote procedure call to slurmctld. If enough calls from scancel
       or other Slurm client commands that send remote procedure calls to  the  slurmctld  daemon
       come  in  at  once, it can result in a degradation of performance of the slurmctld daemon,
       possibly resulting in a denial of service.

       Do not run scancel or other Slurm client commands that  send  remote  procedure  calls  to
       slurmctld  from loops in shell scripts or other programs. Ensure that programs limit calls
       to scancel to the minimum necessary for the information you are trying to gather.

ENVIRONMENT VARIABLES

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

       SCANCEL_ACCOUNT     -A, --account=account

       SCANCEL_BATCH       -b, --batch

       SCANCEL_CTLD        --ctld

       SCANCEL_FULL        -f, --full

       SCANCEL_HURRY       -H, --hurry

       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.

       SLURM_CLUSTERS      -M, --clusters

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 SlurmDBD, users who have an AdminLevel defined (Operator or  Admin)  and  users
       who  are  account  coordinators  are  given the authority to invoke scancel on other users
       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 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) 2010-2021 SchedMD LLC.

       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.