scontrol

NAME

scontrol - view or modify Slurm configuration and state.

SYNOPSIS

scontrol [OPTIONS...] [COMMAND...]

DESCRIPTION

scontrol is used to view or modify Slurm configuration including: job, job step, node, partition, reservation, and overall system configuration. Most of the commands can only be executed by user root or an Administrator. If an attempt to view or modify configuration information is made by an unauthorized user, an error message will be printed and the requested action will not occur. If no command is entered on the execute line, scontrol will operate in an interactive mode and prompt for input. It will continue prompting for input and executing commands until explicitly terminated. If a command is entered on the execute line, scontrol will execute that command and terminate. All commands and options are case-insensitive, although node names, partition names, and reservation names are case-sensitive (node names "LX" and "lx" are distinct). All commands and options can be abbreviated to the extent that the specification is unique. A modified Slurm configuration can be written to a file using the scontrol write config command. The resulting file will be named using the convention "slurm.conf.<datetime>" and located in the same directory as the original "slurm.conf" file. The directory containing the original slurm.conf must be writable for this to occur.

OPTIONS

-a, --all

When the show command is used, then display all partitions, their jobs and jobs steps. This causes information to be displayed about partitions that are configured as hidden and partitions that are unavailable to user's group.

-M, --clusters=<string>

The cluster to issue commands to. Only one cluster name may be specified. Note that the SlurmDBD must be up for this option to work properly. This option implicitly sets the --local option.

-d, --details

Causes the show command to provide additional details where available.

--federation

Report jobs from federation if a member of one.

-F, --future

Report nodes in FUTURE state.

-h, --help

Print a help message describing the usage of scontrol.

--hide

Do not display information about hidden partitions, their jobs and job steps. By default, neither partitions that are configured as hidden nor those partitions unavailable to user's group will be displayed (i.e. this is the default behavior).

--local

Show only information local to this cluster. Ignore other clusters in the federated if a member of one. Overrides --federation.

-o, --oneliner

Print information one line per record.

-Q, --quiet

Print no warning or informational messages, only fatal error messages.

--sibling

Show all sibling jobs on a federated cluster. Implies --federation.

-u, --uid=<uid>

Attempt to update a job as user <uid> instead of the invoking user id.

-v, --verbose

Print detailed event logging. Multiple -v's will further increase the verbosity of logging. By default only errors will be displayed.

-V , --version

Print version information and exit.

COMMANDS

abort

Instruct the Slurm controller to terminate immediately and generate a core file. See "man slurmctld" for information about where the core file will be written.

cancel_reboot <NodeList>

Cancel pending reboots on nodes. The node will be undrain'ed and the reason cleared if the node was drained by an ASAP reboot.

cluster <CLUSTER_NAME>

The cluster to issue commands to. Only one cluster name may be specified.

create <SPECIFICATION>

Create a new node, partition, or reservation. See the full list of parameters below.

completing

Display all jobs in a COMPLETING state along with associated nodes in either a COMPLETING or DOWN state.

delete <SPECIFICATION>

Delete the entry with the specified SPECIFICATION. The three SPECIFICATION choices are NodeName=<nodelist>, PartitionName=<name> and Reservation=<name>. Nodes can't be deleted if they are in a reservation or have jobs on running. Reservations and partitions should have no associated jobs at the time of their deletion (modify the jobs first). If the specified partition is in use, the request is denied.

errnumstr <ERRNO>

Given a Slurm error number, return a descriptive string.

fsdampeningfactor <FACTOR>

Set the FairShareDampeningFactor in slurmctld.

help

Display a description of scontrol options and commands.

hold <job_list>

Prevent a pending job from being started (sets its priority to 0). Use the release command to permit the job to be scheduled. The job_list argument is a comma separated list of job IDs OR "jobname=" with the job's name, which will attempt to hold all jobs having that name. Note that when a job is held by a system administrator using the hold command, only a system administrator may release the job for execution (also see the uhold command). When the job is held by its owner, it may also be released by the job's owner. Additionally, attempting to hold a running job will have not suspend or cancel it. But, it will set the job priority to 0 and update the job reason field, which would hold the job if it was requeued at a later time.

notify <job_id> <message>

Send a message to standard error of the salloc or srun command or batch job associated with the specified job_id.

pidinfo <proc_id>

Print the Slurm job id and scheduled termination time corresponding to the supplied process id, proc_id, on the current node. This will work only with processes on node on which scontrol is run, and only for those processes spawned by Slurm and their descendants.

listpids [<job_id>[.<step_id>]] [< NodeName>]

Print a listing of the process IDs in a job step (if JOBID.STEPID is provided), or all of the job steps in a job (if job_id is provided), or all of the job steps in all of the jobs on the local node (if job_id is not provided or job_id is "*"). This will work only with processes on the node on which scontrol is run, and only for those processes spawned by Slurm and their descendants. Note that some Slurm configurations ( ProctrackType value of pgid) are unable to identify all processes associated with a job or job step. Note that the NodeName option is only really useful when you have multiple slurmd daemons running on the same host machine. Multiple slurmd daemons on one host are, in general, only used by Slurm developers.

ping

Ping the primary and secondary slurmctld daemon and report if they are responding.

reboot [ASAP] [nextstate={RESUME|DOWN}] [reason=<reason>] {ALL|<NodeList>}

Reboot the nodes in the system when they become idle using the RebootProgram as configured in Slurm's slurm.conf file. Each node will have the "REBOOT" flag added to its node state. After a node reboots and the slurmd daemon starts up again, the HealthCheckProgram will run once. Then, the slurmd daemon will register itself with the slurmctld daemon and the "REBOOT" flag will be cleared. The node's "DRAIN" state flag will be cleared if the reboot was "ASAP", nextstate=resume or down. The "ASAP" option adds the "DRAIN" flag to each node's state, preventing additional jobs from running on the node so it can be rebooted and returned to service "As Soon As Possible" (i.e. ASAP). "ASAP" will also set the node reason to "Reboot ASAP" if the "reason" option isn't specified. If the "nextstate" option is specified as "DOWN", then the node will remain in a down state after rebooting. If "nextstate" is specified as "RESUME", then the nodes will resume as normal and the node's reason and "DRAIN" state will be cleared. Resuming nodes will be considered as available in backfill future scheduling and won't be replaced by idle nodes in a reservation. The "reason" option sets each node's reason to a user-defined message. A default reason of "reboot requested" is set if no other reason is set on the node. The reason will be appended with: "reboot issued" when the reboot is issued; "reboot complete" when the node registers and has a "nextstate" of "DOWN"; or "reboot timed out" when the node fails to register within ResumeTimeout. You must specify either a list of nodes or that ALL nodes are to be rebooted. NOTE: By default, this command does not prevent additional jobs from being scheduled on any nodes before reboot. To do this, you can either use the "ASAP" option or explicitly drain the nodes beforehand. You can alternately create an advanced reservation to prevent additional jobs from being initiated on nodes to be rebooted. Pending reboots can be cancelled by using "scontrol cancel_reboot <node>" or setting the node state to "CANCEL_REBOOT". A node will be marked "DOWN" if it doesn't reboot within ResumeTimeout.

reconfigure

Instruct all Slurm daemons to re-read the configuration file. This command does not restart the daemons. This mechanism can be used to modify configuration parameters set in slurm.conf. The Slurm controller (slurmctld) forwards the request to all other daemons (slurmd daemon on each compute node). Running jobs continue execution. Most configuration parameters can be changed by just running this command; however, there are parameters that require a restart of the relevant Slurm daemons. Parameters requiring a restart will be noted in the slurm.conf(5) man page. The slurmctld daemon and all slurmd daemons must also be restarted if nodes are added to or removed from the cluster.

release <job_list>

Release a previously held job to begin execution. The job_list argument is a comma separated list of job IDs OR "jobname=" with the job's name, which will attempt to hold all jobs having that name. Also see hold.

requeue [<option>] <job_list>

Requeue a running, suspended or finished Slurm batch job into pending state. The job_list argument is a comma separated list of job IDs. The command accepts the following option:

requeuehold [<option>] <job_list>

Requeue a running, suspended or finished Slurm batch job into pending state, moreover the job is put in held state (priority zero). The job_list argument is a comma separated list of job IDs. A held job can be released using scontrol to reset its priority (e.g. "scontrol release <job_id>"). The command accepts the following options:

resume <job_list>

Resume a previously suspended job. The job_list argument is a comma separated list of job IDs. Also see suspend. NOTE: A suspended job releases its CPUs for allocation to other jobs. Resuming a previously suspended job may result in multiple jobs being allocated the same CPUs, which could trigger gang scheduling with some configurations or severe degradation in performance with other configurations. Use of the scancel command to send SIGSTOP and SIGCONT signals would stop a job without releasing its CPUs for allocation to other jobs and would be a preferable mechanism in many cases. If performing system maintenance you may want to use suspend/resume in the following way. Before suspending set all nodes to draining or set all partitions to down so that no new jobs can be scheduled. Then suspend jobs. Once maintenance is done resume jobs then resume nodes and/or set all partitions back to up. Use with caution.

schedloglevel <LEVEL>

Enable or disable scheduler logging. LEVEL may be "0", "1", "disable" or "enable". "0" has the same effect as "disable". "1" has the same effect as "enable". This value is temporary and will be overwritten when the slurmctld daemon reads the slurm.conf configuration file (e.g. when the daemon is restarted or scontrol reconfigure is executed) if the SlurmSchedLogLevel parameter is present.

setdebug <LEVEL>

Change the debug level of the slurmctld daemon for all active logging channels not originally configured off (quiet). LEVEL may be an integer value between zero and nine (using the same values as SlurmctldDebug in the slurm.conf file) or the name of the most detailed message type to be printed: "quiet", "fatal", "error", "info", "verbose", "debug", "debug2", "debug3", "debug4", or "debug5". This value is temporary and will be overwritten whenever the slurmctld daemon reads the slurm.conf configuration file (e.g. when the daemon is restarted or scontrol reconfigure is executed).

setdebugflags [+|-]<FLAG>

Add or remove DebugFlags of the slurmctld daemon. See "man slurm.conf" for a list of supported DebugFlags. NOTE: Changing the value of some DebugFlags will have no effect without restarting the slurmctld daemon, which would set DebugFlags based upon the contents of the slurm.conf configuration file or the SLURM_DEBUG_FLAGS environment variable. The environment variable takes precedence over the setting in the slurm.conf.

show <ENTITY>[=<ID>] or < ENTITY> [<ID>]

Display the state of the specified entity with the specified identification.

shutdown <OPTION>

Instruct Slurm daemons to save current state and terminate. By default, the Slurm controller (slurmctld) forwards the request all other daemons (slurmd daemon on each compute node). An OPTION of slurmctld or controller results in only the slurmctld daemon being shutdown and the slurmd daemons remaining active.

suspend <job_list>

Suspend a running job. The job_list argument is a comma separated list of job IDs. Use the resume command to resume its execution. User processes must stop on receipt of SIGSTOP signal and resume upon receipt of SIGCONT for this operation to be effective. Not all architectures and configurations support job suspension. If a suspended job is requeued, it will be placed in a held state. The time a job is suspended will not count against a job's time limit. Only an operator, administrator, SlurmUser, or root can suspend jobs.

takeover [<INDEX>]

Instruct one of Slurm's backup controllers (slurmctld) to take over system control. By default the first backup controller (INDEX=1) requests control from the primary and waits for its termination. After that, it switches from backup mode to controller mode. If primary controller can not be contacted, it directly switches to controller mode. This can be used to speed up the Slurm controller fail-over mechanism when the primary node is down. This can be used to minimize disruption if the computer executing the primary Slurm controller is scheduled down. (Note: Slurm's primary controller will take the control back at startup.)

top <job_list>

Move the specified job IDs to the top of the queue of jobs belonging to the identical user ID, partition name, account, and QOS. The job_list argument is a comma separated ordered list of job IDs. Any job not matching all of those fields will not be effected. Only jobs submitted to a single partition will be effected. This operation changes the order of jobs by adjusting job nice values. The net effect on that user's throughput will be negligible to slightly negative. This operation is disabled by default for non-privileged (non-operator, admin, SlurmUser, or root) users. This operation may be enabled for non-privileged users by the system administrator by including the option "enable_user_top" in the SchedulerParameters configuration parameter.

token [lifespan=<lifespan>] [username=< username>]

Return an auth token which can be used to support JWT authentication if AuthAltTypes=auth/jwt has been enabled on the system. Supports two optional arguments. lifespan= may be used to specify the token's lifespan in seconds. username (only available to SlurmUser/root) may be used to request a token for a different username.

uhold <job_list>

Prevent a pending job from being started (sets its priority to 0). The job_list argument is a space separated list of job IDs or job names. Use the release command to permit the job to be scheduled. This command is designed for a system administrator to hold a job so that the job owner may release it rather than requiring the intervention of a system administrator (also see the hold command).

update <SPECIFICATION>

Update job, step, node, partition, or reservation configuration per the supplied specification. SPECIFICATION is in the same format as the Slurm configuration file and the output of the show command described above. It may be desirable to execute the show command (described above) on the specific entity you want to update, then use cut-and-paste tools to enter updated configuration values to the update. Note that while most configuration values can be changed using this command, not all can be changed using this mechanism. In particular, the hardware configuration of a node or the physical addition or removal of nodes from the cluster may only be accomplished through editing the Slurm configuration file and executing the reconfigure command (described above).

version

Display the version number of scontrol being executed.

wait_job <job_id>

Wait until a job and all of its nodes are ready for use or the job has entered some termination state. This option is particularly useful in the Slurm Prolog or in the batch script itself if nodes are powered down and restarted automatically as needed. NOTE: Don't use scontrol wait_job in PrologSlurmctld or Prolog with PrologFlags=Alloc as this will result in a deadlock.

NOTE: When using wait_job for an array job, use the SLURM_JOB_ID environment variable to reference the job rather than the SLURM_ARRAY_JOB_ID variable.

write batch_script <job_id> [<optional_filename>]

Write the batch script for a given job_id to a file or to stdout. The file will default to slurm-<job_id>.sh if the optional filename argument is not given. The script will be written to stdout if - is given instead of a filename. The batch script can only be retrieved by an admin or operator, or by the owner of the job.

write config <optional_filename>

Write the current configuration to a file with the naming convention of "slurm.conf.<datetime>" in the same directory as the original slurm.conf file. If a filename is given that file location with a .<datetime> suffix is created.

INTERACTIVE COMMANDS

NOTE: All commands listed below can be used in the interactive mode, but NOT on the initial command line.

all

Show all partitions, their jobs and jobs steps. This causes information to be displayed about partitions that are configured as hidden and partitions that are unavailable to user's group.

details

Causes the show command to provide additional details where available. Job information will include CPUs and NUMA memory allocated on each node. Note that on computers with hyperthreading enabled and Slurm configured to allocate cores, each listed CPU represents one physical core. Each hyperthread on that core can be allocated a separate task, so a job's CPU count and task count may differ. See the --cpu-bind and --mem-bind option descriptions in srun man pages for more information. The details option is currently only supported for the show job command.

exit

Terminate scontrol interactive session.

hide

Do not display partition, job or jobs step information for partitions that are configured as hidden or partitions that are unavailable to the user's group. This is the default behavior.

oneliner

Print information one line per record.

quiet

Print no warning or informational messages, only fatal error messages.

quit

Terminate the execution of scontrol.

verbose

Print detailed event logging. This includes time-stamps on data structures, record counts, etc.

!!

Repeat the last command executed.

JOBS - SPECIFICATIONS FOR UPDATE COMMAND

Note that update requests done by either root, SlurmUser or Administrators are not subject to certain restrictions. For instance, if an Administrator changes the QOS on a pending job, certain limits such as the TimeLimit will not be changed automatically as changes made by the Administrators are allowed to violate these restrictions.

Account=<account>

Account name to be changed for this job's resource use. Value may be cleared with blank data value, "Account=".

AdminComment=<spec>

Arbitrary descriptive string. Can only be set by a Slurm administrator.

ArrayTaskThrottle=<count>

Specify the maximum number of tasks in a job array that can execute at the same time. Set the count to zero in order to eliminate any limit. The task throttle count for a job array is reported as part of its ArrayTaskId field, preceded with a percent sign. For example "ArrayTaskId=1-10%2" indicates the maximum number of running tasks is limited to 2.

BurstBuffer=<spec>

Burst buffer specification to be changed for this job's resource use. Value may be cleared with blank data value, "BurstBuffer=". Format is burst buffer plugin specific.

Clusters=<spec>

Specifies the clusters that the federated job can run on.

ClusterFeatures=<spec>

Specifies features that a federated cluster must have to have a sibling job submitted to it. Slurm will attempt to submit a sibling job to a cluster if it has at least one of the specified features.

Comment=<spec>

Arbitrary descriptive string.

Contiguous={yes|no}

Set the job's requirement for contiguous (consecutive) nodes to be allocated. Possible values are "YES" and "NO". Only the Slurm administrator or root can change this parameter.

CoreSpec=<count>

Number of cores to reserve per node for system use. The job will be charged for these cores, but be unable to use them. Will be reported as "*" if not constrained.

CPUsPerTask=<count>

Change the CPUsPerTask job's value.

Deadline=<time_spec>

It accepts times of the form HH:MM:SS to specify a deadline to a job at a specific time of day (seconds are optional). You may also specify midnight, noon, fika (3 PM) or teatime (4 PM) and you can have a time-of-day suffixed with AM or PM for a deadline in the morning or the evening. You can specify a deadline for the job with a date of the form MMDDYY or MM/DD/YY or MM.DD.YY, or a date and time as YYYY-MM-DD[THH:MM[:SS]]. You can also give times like now + count time-units, where the time-units can be seconds (default), minutes, hours, days, or weeks and you can tell Slurm to put a deadline for tomorrow with the keyword tomorrow. The specified deadline must be later than the current time. Only pending jobs can have the deadline updated. Only the Slurm administrator or root can change this parameter.

DelayBoot=<time_spec>

Change the time to decide whether to reboot nodes in order to satisfy job's feature specification if the job has been eligible to run for less than this time period. See salloc/sbatch man pages option --delay-boot.

Dependency=<dependency_list>

Defer job's initiation until specified job dependency specification is satisfied. Cancel dependency with an empty dependency_list (e.g. "Dependency="). < dependency_list> is of the form < type:job_id[:job_id][,type:job_id[:job_id]]>. Many jobs can share the same dependency and these jobs may even belong to different users.

EligibleTime=<time_spec>

See StartTime.

EndTime

The time the job is expected to terminate based on the job's time limit. When the job ends sooner, this field will be updated with the actual end time.

ExcNodeList=<nodes>

Set the job's list of excluded node. Multiple node names may be specified using simple node range expressions (e.g. "lx[10-20]"). Value may be cleared with blank data value, "ExcNodeList=".

Features=<features>

Set the job's required node features. The list of features may include multiple feature names separated by ampersand (AND) and/or vertical bar (OR) operators. For example: Features="opteron&video" or Features="fast|faster". In the first example, only nodes having both the feature "opteron" AND the feature "video" will be used. There is no mechanism to specify that you want one node with feature "opteron" and another node with feature "video" in case no node has both features. If only one of a set of possible options should be used for all allocated nodes, then use the OR operator and enclose the options within square brackets. For example: " Features=[rack1|rack2|rack3|rack4]" might be used to specify that all nodes must be allocated on a single rack of the cluster, but any of those four racks can be used. A request can also specify the number of nodes needed with some feature by appending an asterisk and count after the feature name. For example " Features=graphics*4" indicates that at least four allocated nodes must have the feature "graphics." Parenthesis are also supported for features to be ANDed together. For example " Features=[(knl&a2a&flat)*4&haswell*2]" indicates the resource allocation should include 4 nodes with ALL of the features "knl", "a2a", and "flat" plus 2 nodes with the feature "haswell". Constraints with node counts may only be combined with AND operators. Value may be cleared with blank data value, for example "Features=".

Gres=<list>

Specifies a comma-delimited list of generic consumable resources. The format of each entry on the list is "name[:count[*cpu]]". The name is that of the consumable resource. The count is the number of those resources with a default value of 1. The specified resources will be allocated to the job on each node allocated unless "*cpu" is appended, in which case the resources will be allocated on a per cpu basis. The available generic consumable resources is configurable by the system administrator. A list of available generic consumable resources will be printed and the command will exit if the option argument is "help". Examples of use include "Gres=gpus:2*cpu,disk=40G" and "Gres=help".

JobId=<job_list>

Identify the job(s) to be updated. The job_list may be a comma separated list of job IDs. Either JobId or JobName is required.

Licenses=<name>

Specification of licenses (or other resources available on all nodes of the cluster) as described in salloc/sbatch/srun man pages.

MailType=<types>

Set the mail event types. Valid type values are NONE, BEGIN, END, FAIL, REQUEUE, ALL (equivalent to BEGIN, END, FAIL, REQUEUE, and STAGE_OUT), STAGE_OUT (burst buffer stage out and teardown completed), TIME_LIMIT, TIME_LIMIT_90 (reached 90 percent of time limit), TIME_LIMIT_80 (reached 80 percent of time limit), TIME_LIMIT_50 (reached 50 percent of time limit) and ARRAY_TASKS (send emails for each array task). Multiple type values may be specified in a comma separated list. Unless the ARRAY_TASKS option is specified, mail notifications on job BEGIN, END and FAIL apply to a job array as a whole rather than generating individual email messages for each task in the job array.

MailUser=<name>

Set the user to receive email notification of state changes. A blank string will set the mail user to the default which is the submitting user.

MinCPUsNode=<count>

Set the job's minimum number of CPUs per node to the specified value.

MinMemoryCPU=<megabytes>

Set the job's minimum real memory required per allocated CPU to the specified value. Either MinMemoryCPU or MinMemoryNode may be set, but not both.

MinMemoryNode=<megabytes>

Set the job's minimum real memory required per node to the specified value. Either MinMemoryCPU or MinMemoryNode may be set, but not both.

MinTmpDiskNode=<megabytes>

Set the job's minimum temporary disk space required per node to the specified value. Only the Slurm administrator or root can change this parameter.

TimeMin=<timespec>

Change TimeMin value which specifies the minimum time limit minutes of the job.

JobName=<name>

Identify the name of jobs to be modified or set the job's name to the specified value. When used to identify jobs to be modified, all jobs belonging to all users are modified unless the UserID option is used to identify a specific user. Either JobId or JobName is required.

Name[=<name>]

See JobName.

Nice[=<adjustment>]

Update the job with an adjusted scheduling priority within Slurm. With no adjustment value the scheduling priority is decreased by 100. A negative nice value increases the priority, otherwise decreases it. The adjustment range is +/- 2147483645. Only privileged users can specify a negative adjustment.

NodeList=<nodes>

Change the nodes allocated to a running job to shrink its size. The specified list of nodes must be a subset of the nodes currently allocated to the job. Multiple node names may be specified using simple node range expressions (e.g. "lx[10-20]"). After a job's allocation is reduced, subsequent srun commands must explicitly specify node and task counts which are valid for the new allocation.

NumCPUs=<min_count>[-<max_count>]

Set the job's minimum and optionally maximum count of CPUs to be allocated.

NumNodes=<min_count>[-<max_count>]

Set the job's minimum and optionally maximum count of nodes to be allocated. If the job is already running, use this to specify a node count less than currently allocated and resources previously allocated to the job will be relinquished. After a job's allocation is reduced, subsequent srun commands must explicitly specify node and task counts which are valid for the new allocation. Also see the NodeList parameter above. This is the same as ReqNodes.

NumTasks=<count>

Set the job's count of requested tasks to the specified value. The number of tasks started in a specific step inside the allocation may differ from this value, for instance when a different number of tasks is requested on step creation. This is the same as ReqProcs.

OverSubscribe={yes|no}

Set the job's ability to share compute resources (i.e. individual CPUs) with other jobs. Possible values are "YES" and "NO". This option can only be changed for pending jobs.

Partition=<name>

Set the job's partition to the specified value.

Prefer=<features>

Set the job's preferred node features. This list is only preferred, not required like Features is. This list will override what is requested in Features. See Features option above.

Priority=<number>

Set the job's priority to the specified value. Note that a job priority of zero prevents the job from ever being scheduled. By setting a job's priority to zero it is held. Set the priority to a non-zero value to permit it to run. Explicitly setting a job's priority clears any previously set nice value and removes the priority/multifactor plugin's ability to manage a job's priority. In order to restore the priority/multifactor plugin's ability to manage a job's priority, hold and then release the job. Only the Slurm administrator or root can increase job's priority.

QOS=<name>

Set the job's QOS (Quality Of Service) to the specified value. Value may be cleared with blank data value, "QOS=".

Reboot={yes|no}

Set the job's flag that specifies whether to force the allocated nodes to reboot before starting the job. This is only supported with some system configurations and therefore it could be silently ignored.

ReqCores=<count>

Change the job's requested Cores count.

ReqNodeList=<nodes>

Set the job's list of required node. Multiple node names may be specified using simple node range expressions (e.g. "lx[10-20]"). Value may be cleared with blank data value, "ReqNodeList=".

ReqNodes=<min_count>[-<max_count>]

See NumNodes.

ReqProcs=<count>

See NumTasks.

ReqSockets=<count>

Change the job's requested socket count.

ReqThreads=<count>

Change the job's requested threads count.

IRequeue={0|1}

Stipulates whether a job should be requeued after a node failure: 0 for no, 1 for yes.

ReservationName=<name>

Set the job's reservation to the specified value. Value may be cleared with blank data value, "ReservationName=".

ResetAccrueTime

Set the job's accrue time value to 'now' meaning it will lose any time previously accrued for priority. Helpful if you have a large queue of jobs already in the queue and want to start limiting how many jobs can accrue time without waiting for the queue to flush out.

SiteFactor=<account>

Specify the job's admin priority factor in the range of +/-2147483645. Only privileged users can modify the value.

StdOut=<filepath>

Set the batch job's stdout file path.

Shared={yes|no}

See OverSubscribe option above.

StartTime=<time_spec>

Set the job's earliest initiation time. It accepts times of the form HH:MM:SS to run a job at a specific time of day (seconds are optional). (If that time is already past, the next day is assumed.) You may also specify midnight, noon, fika (3 PM) or teatime (4 PM) and you can have a time-of-day suffixed with AM or PM for running in the morning or the evening. You can also say what day the job will be run, by specifying a date of the form MMDDYY or MM/DD/YY or MM.DD.YY, or a date and time as YYYY-MM-DD[THH:MM[:SS]]. You can also give times like now + count time-units, where the time-units can be seconds (default), minutes, hours, days, or weeks and you can tell Slurm to run the job today with the keyword today and to run the job tomorrow with the keyword tomorrow.

Switches=<count>[@<max-time-to-wait>]

When a tree topology is used, this defines the maximum count of switches desired for the job allocation. If Slurm finds an allocation containing more switches than the count specified, the job remain pending until it either finds an allocation with desired switch count or the time limit expires. By default there is no switch count limit and no time limit delay. Set the count to zero in order to clean any previously set count (disabling the limit). The job's maximum time delay may be limited by the system administrator using the SchedulerParameters configuration parameter with the max_switch_wait parameter option. Also see wait-for-switch.

wait-for-switch=<seconds>

Change max time to wait for a switch <seconds> secs.

TasksPerNode=<count>

Change the job's requested TasksPerNode.

ThreadSpec=<count>

Number of threads to reserve per node for system use. The job will be charged for these threads, but be unable to use them. Will be reported as "*" if not constrained.

TimeLimit=<time>

The job's time limit. Output format is [days-]hours:minutes:seconds or "UNLIMITED". Input format (for update command) set is minutes, minutes:seconds, hours:minutes:seconds, days-hours, days-hours:minutes or days-hours:minutes:seconds. Time resolution is one minute and second values are rounded up to the next minute. If changing the time limit of a job, either specify a new time limit value or precede the time and equal sign with a "+" or "-" to increment or decrement the current time limit (e.g. "TimeLimit+=30"). In order to increment or decrement the current time limit, the JobId specification must precede the TimeLimit specification. Note that incrementing or decrementing the time limit for a job array is only allowed before the job array has been split into more than one job record. Only the Slurm administrator or root can increase job's TimeLimit.

UserID=<UID or name>

Used with the JobName option to identify jobs to be modified. Either a user name or numeric ID (UID), may be specified.

WCKey=<key>

Set the job's workload characterization key to the specified value.

WorkDir=<directory_name>

Set the job's working directory to the specified value. Note that this may only be set for jobs in the PENDING state, and that jobs may fail to launch if they rely on relative paths to the originally submitted WorkDir.

JOBS - SPECIFICATIONS FOR SHOW COMMAND

The "show" command, when used with the "job" or "job <jobid>" entity displays detailed information about a job or jobs. Much of this information may be modified using the "update job" command as described above. However, the following fields displayed by the show job command are read-only and cannot be modified:

AllocNode:Sid

Local node and system id making the resource allocation.

BatchFlag

Jobs submitted using the sbatch command have BatchFlag set to 1. Jobs submitted using other commands have BatchFlag set to 0.

ExitCode=<exit>:<sig>

Exit status reported for the job by the wait() function. The first number is the exit code, typically as set by the exit() function. The second number of the signal that caused the process to terminate if it was terminated by a signal.

GroupId

The group under which the job was submitted.

JobState

The current state of the job.

NodeListIndices

The NodeIndices expose the internal indices into the node table associated with the node(s) allocated to the job.

NtasksPerN:B:S:C=<tasks_per_node>:<tasks_per_baseboard>:<tasks_per_socket>:<tasks_per_core>

Specifies the number of tasks to be started per hardware component (node, baseboard, socket and core). Unconstrained values may be shown as "0" or "*".

PreemptEligibleTime

Time the job becomes eligible for preemption. Modified by PreemptExemptTime, either from the global option in slurm.conf or the job QOS. This is hidden if the job has not started or if PreemptMode=OFF.

PreemptTime

Time at which job was signaled that it was selected for preemption. This value is only meaningful for PreemptMode=CANCEL and PreemptMode=REQUEUE and for jobs in a partition or QOS that has a GraceTime value designated. This is hidden if the job has not started or if PreemptMode=OFF.

PreSusTime

Time the job ran prior to last suspend.

Reason

The reason job is not running: e.g., waiting "Resources".

ReqB:S:C:T=<baseboard_count>:<socket_per_baseboard_count>:<core_per_socket_count>:<thread_per_core_count>

Specifies the count of various hardware components requested by the job. Unconstrained values may be shown as "0" or "*".

SecsPreSuspend=<seconds>

If the job is suspended, this is the run time accumulated by the job (in seconds) prior to being suspended.

Socks/Node=<count>

Count of desired sockets per node

SubmitTime

The time and date stamp (in localtime) the job was submitted. The format of the output is identical to that of the EndTime field. NOTE: If a job is requeued, the submit time is reset. To obtain the original submit time it is necessary to use the "sacct -j <job_id[.<step_id>]" command also designating the -D or --duplicate option to display all duplicate entries for a job.

SuspendTime

Time the job was last suspended or resumed. NOTE on information displayed for various job states: When you submit a request for the "show job" function the scontrol process makes an RPC request call to slurmctld with a REQUEST_JOB_INFO message type. If the state of the job is PENDING, then it returns some detail information such as: min_nodes, min_procs, cpus_per_task, etc. If the state is other than PENDING the code assumes that it is in a further state such as RUNNING, COMPLETE, etc. In these cases the code explicitly returns zero for these values. These values are meaningless once the job resources have been allocated and the job has started.

STEPS - SPECIFICATIONS FOR UPDATE COMMAND

StepId=<job_id>[.<step_id>]

Identify the step to be updated. If the job_id is given, but no step_id is specified then all steps of the identified job will be modified. This specification is required.

TimeLimit=<time>

The job's time limit. Output format is [days-]hours:minutes:seconds or "UNLIMITED". Input format (for update command) set is minutes, minutes:seconds, hours:minutes:seconds, days-hours, days-hours:minutes or days-hours:minutes:seconds. Time resolution is one minute and second values are rounded up to the next minute. If changing the time limit of a step, either specify a new time limit value or precede the time with a "+" or "-" to increment or decrement the current time limit (e.g. "TimeLimit=+30"). In order to increment or decrement the current time limit, the StepId specification must precede the TimeLimit specification.

NODES - SPECIFICATIONS FOR CREATE COMMAND

Provide the same NodeName configuration as found in the slurm.conf. See slurm.conf man page for details. Only State=CLOUD and State=FUTURE nodes are allowed.

NODES - SPECIFICATIONS FOR UPDATE COMMAND

NodeName=<name>

Identify the node(s) to be updated. Multiple node names may be specified using simple node range expressions (e.g. "lx[10-20]"). Nodesets can also be specified by themselves or mixed with node range expressions, using a comma as a list separator. If the keyword "ALL" is specified alone, then the update will be attempted against all the nodes in the local cluster. This specification is required.

ActiveFeatures=<features>

Identify the feature(s) currently active on the specified node. Any previously active feature specification will be overwritten with the new value. Also see AvailableFeatures. Typically ActiveFeatures will be identical to AvailableFeatures; however ActiveFeatures may be configured as a subset of the AvailableFeatures. For example, a node may be booted in multiple configurations. In that case, all possible configurations may be identified as AvailableFeatures, while ActiveFeatures would identify the current node configuration. When updating the ActiveFeatures with scontrol, the change is only made in slurmctld. When using a node_features plugin the state/features of the node must be updated on the node such that a new node start will report the updated state/features.

AvailableFeatures=<features>

Identify the feature(s) available on the specified node. Any previously defined available feature specification will be overwritten with the new value. AvailableFeatures assigned via scontrol will only persist across the restart of the slurmctld daemon with the -R option and state files preserved or slurmctld's receipt of a SIGHUP. Update slurm.conf with any changes meant to be persistent across normal restarts of slurmctld or the execution of scontrol reconfig. Note: Available features being removed via scontrol must not be active (i.e. remove them from ActiveFeatures first).

Comment=<comment>

Arbitrary descriptive string. Use quotes to enclose a comment having more than one word

CpuBind=<node>

Specify the task binding mode to be used by default for this node. Supported options include: "none", "socket", "ldom" (NUMA), "core", "thread" and "off" (remove previous binding mode).

Extra=<comment>

Arbitrary string on the node. Use quotes to enclose a string having more than one word.

Gres=<gres>

Identify generic resources to be associated with the specified node. Any previously defined generic resources will be overwritten with the new value. Specifications for multiple generic resources should be comma separated. Each resource specification consists of a name followed by an optional colon with a numeric value (default value is one) (e.g. "Gres=bandwidth:10000"). Modification of GRES count associated with specific files (e.g. GPUs) is not allowed other than to set their count on a node to zero. In order to change the GRES count to another value, modify your slurm.conf and gres.conf files and restart daemons. If GRES are associated with specific sockets, that information will be reported For example if all 4 GPUs on a node are all associated with socket zero, then "Gres=gpu:4(S:0)". If associated with sockets 0 and 1 then "Gres=gpu:4(S:0-1)". The information of which specific GPUs are associated with specific GPUs is not reported, but only available by parsing the gres.conf file. Generic resources assigned via scontrol will only persist across the restart of the slurmctld daemon with the -R option and state files preserved or slurmctld's receipt of a SIGHUP. Update slurm.conf with any changes meant to be persistent across normal restarts of slurmctld or the execution of scontrol reconfig.

NodeAddr=<node address>

Name that a node should be referred to in establishing a communications path. This name will be used as an argument to the getaddrinfo() function for identification. If a node range expression is used to designate multiple nodes, they must exactly match the entries in the NodeName (e.g. "NodeName=lx[0-7] NodeAddr=elx[0-7]"). NodeAddr may also contain IP addresses.

NodeHostname=<node hostname>

Typically this would be the string that "/bin/hostname -s" returns. It may also be the fully qualified domain name as returned by "/bin/hostname -f" (e.g. "foo1.bar.com"), or any valid domain name associated with the host through the host database (/etc/hosts) or DNS, depending on the resolver settings. Note that if the short form of the hostname is not used, it may prevent use of hostlist expressions (the numeric portion in brackets must be at the end of the string). A node range expression can be used to specify a set of nodes. If an expression is used, the number of nodes identified by NodeHostname must be identical to the number of nodes identified by NodeName.

Reason=<reason>

Identify the reason the node is in a "DOWN", "DRAINED", "DRAINING", "FAILING" or "FAIL" state. Use quotes to enclose a reason having more than one word.

State=<state>

Assign one of the following states/actions to the node(s) specified by the update command.

While all of the above states are valid, some of them are not valid new node states given their prior state. NOTE: The scontrol command should not be used to change node state on Cray systems. Use Cray tools such as xtprocadmin instead.

Weight=<weight>

Identify weight to be associated with specified nodes. This allows dynamic changes to weight associated with nodes, which will be used for the subsequent node allocation decisions. Weight assigned via scontrol will only persist across the restart of the slurmctld daemon with the -R option and state files preserved or slurmctld's receipt of a SIGHUP. Update slurm.conf with any changes meant to be persistent across normal restarts of slurmctld or the execution of scontrol reconfig.

NODES - SPECIFICATIONS FOR DELETE COMMAND

NodeName=<nodes>

Identify the node(s) to be deleted. Multiple node names may be specified using simple node range expressions (e.g. "lx[10-20]"). Nodesets can also be specified by themselves or mixed with node range expressions, using a comma as a list separator. If the keyword "ALL" is specified alone, then the update will be attempted against all the nodes in the local cluster. This specification is required.

NODES - SPECIFICATIONS FOR SHOW COMMAND

AllocMem

The total memory, in MB, currently allocated by jobs on the node.

CPULoad

CPU load of a node as reported by the OS.

CPUSpecList

The list of Slurm abstract CPU IDs on this node reserved for exclusive use by the Slurm compute node daemons (slurmd, slurmstepd).

FreeMem

The total memory, in MB, currently free on the node as reported by the OS.

LastBusyTime

The last time the node was busy (i.e. last time the node had jobs on it). This time is used in PowerSave to determine when to suspend nodes (e.g. now - LastBusy > SuspendTime).

MemSpecLimit

The combined memory limit, in megabytes, on this node for the Slurm compute node daemons (slurmd, slurmstepd).

RealMemory

The total memory, in MB, on the node.

State

Identify the state(s) assigned to the node with '+' delimited state flags. States:

Flags:

The meaning of the energy information is as follows:

The meaning of the external sensors information is as follows:

FRONTEND - SPECIFICATIONS FOR UPDATE COMMAND

FrontendName=<name>

Identify the front end node to be updated. This specification is required.

Reason=<reason>

Identify the reason the node is in a "DOWN" or "DRAIN" state. Use quotes to enclose a reason having more than one word.

State=<state>

Identify the state to be assigned to the front end node. Possible values are "DOWN", "DRAIN" or "RESUME". If you want to remove a front end node from service, you typically want to set its state to "DRAIN". "RESUME" is not an actual node state, but will return a "DRAINED", "DRAINING", or "DOWN" front end node to service, either "IDLE" or "ALLOCATED" state as appropriate. Setting a front end node "DOWN" will cause all running and suspended jobs on that node to be terminated.

PARTITIONS - SPECIFICATIONS FOR CREATE, UPDATE, AND DELETE COMMANDS

AllocNodes=<name>

Comma separated list of nodes from which users can execute jobs in the partition. Node names may be specified using the node range expression syntax described above. The default value is "ALL".

AllowAccounts=<name>

Identify the Accounts which may use this partition. Multiple Accounts may be specified in a comma separated list. To permit all Accounts to use the partition specify "AllowAccounts=ALL".

AllowGroups=<name>

Identify the user groups which may use this partition. Multiple groups may be specified in a comma separated list. To permit all groups to use the partition specify "AllowGroups=ALL".

AllowQOS=<name>

Identify the QOS's which may use this partition. Multiple QOS's may be specified in a comma separated list. To permit all QOS's to use the partition specify "AllowQOS=ALL".

Alternate=<partition name>

Alternate partition to be used if the state of this partition is "DRAIN" or "INACTIVE." The value "NONE" will clear a previously set alternate partition.

CpuBind=<node>

Specify the task binding mode to be used by default for this partition. Supported options include: "none", "socket", "ldom" (NUMA), "core", "thread" and "off" (remove previous binding mode).

Default={yes|no}

Specify if this partition is to be used by jobs which do not explicitly identify a partition to use. Possible output values are "YES" and "NO". In order to change the default partition of a running system, use the scontrol update command and set Default=yes for the partition that you want to become the new default.

DefaultTime=<time>

Run time limit used for jobs that don't specify a value. If not set then MaxTime will be used. Format is the same as for MaxTime.

DefMemPerCPU=<MB>

Set the default memory to be allocated per CPU for jobs in this partition. The memory size is specified in megabytes.

DefMemPerNode=<MB>

Set the default memory to be allocated per node for jobs in this partition. The memory size is specified in megabytes.

DenyAccounts=<name>

Identify the Accounts which should be denied access to this partition. Multiple Accounts may be specified in a comma separated list.

DenyQOS=<name>

Identify the QOS's which should be denied access to this partition. Multiple QOS's may be specified in a comma separated list.

DisableRootJobs={yes|no}

Specify if jobs can be executed as user root. Possible values are "YES" and "NO".

ExclusiveUser={yes|no}

When enabled nodes will be exclusively allocated to users. Multiple jobs can be run simultaneously, but those jobs must be from a single user.

GraceTime=<seconds>

Specifies, in units of seconds, the preemption grace time to be extended to a job which has been selected for preemption. The default value is zero, no preemption grace time is allowed on this partition or qos. (Meaningful only for PreemptMode=CANCEL)

Hidden={yes|no}

Specify if the partition and its jobs should be hidden from view. Hidden partitions will by default not be reported by Slurm APIs or commands. Possible values are "YES" and "NO".

JobDefaults=<specs>

Specify job default values using a comma-delimited list of "key=value" pairs. Supported keys include

MaxCPUsPerNode=<count>

Set the maximum number of CPUs that can be allocated per node to all jobs in this partition.

LLN={yes|no}

Schedule jobs on the least loaded nodes (based on the number of idle CPUs).

MaxMemPerCPU=<MB>

Set the maximum memory to be allocated per CPU for jobs in this partition. The memory size is specified in megabytes.

MaxMemPerNode=<MB>

Set the maximum memory to be allocated per node for jobs in this partition. The memory size is specified in megabytes.

MaxNodes=<count>

Set the maximum number of nodes which will be allocated to any single job in the partition. Specify a number, "INFINITE" or "UNLIMITED". Changing the MaxNodes of a partition has no effect upon jobs that have already begun execution.

MaxTime=<time>

The maximum run time for jobs. Output format is [days-]hours:minutes:seconds or "UNLIMITED". Input format (for update command) is minutes, minutes:seconds, hours:minutes:seconds, days-hours, days-hours:minutes or days-hours:minutes:seconds. Time resolution is one minute and second values are rounded up to the next minute. Changing the MaxTime of a partition has no effect upon jobs that have already begun execution.

MinNodes=<count>

Set the minimum number of nodes which will be allocated to any single job in the partition. Changing the MinNodes of a partition has no effect upon jobs that have already begun execution. Increasing this value may prevent pending jobs from starting, even if they were submitted without -N/--nodes specification. If you do get in that situation, updating the MinNodes value of a pending job using the scontrol command will allow that job to be scheduled.

Nodes=<name>

Identify the node(s) to be associated with this partition. Multiple node names may be specified using simple node range expressions (e.g. "lx[10-20]"). Note that jobs may only be associated with one partition at any time. Specify a blank data value to remove all nodes from a partition: "Nodes=". Changing the Nodes in a partition has no effect upon jobs that have already begun execution.

OverSubscribe={yes|no|exclusive|force}[:<job_count>]

Specify if compute resources (i.e. individual CPUs) in this partition can be shared by multiple jobs. Possible values are "YES", "NO", "EXCLUSIVE" and "FORCE". An optional job count specifies how many jobs can be allocated to use each resource.

OverTimeLimit=<count>

Number of minutes by which a job can exceed its time limit before being canceled. The configured job time limit is treated as a soft limit. Adding OverTimeLimit to the soft limit provides a hard limit, at which point the job is canceled. This is particularly useful for backfill scheduling, which bases upon each job's soft time limit. A partition-specific OverTimeLimit will override any global OverTimeLimit value. If not specified, the global OverTimeLimit value will take precedence. May not exceed 65533 minutes. An input value of "UNLIMITED" will clear any previously configured partition-specific OverTimeLimit value.

PartitionName=<name>

Identify the partition to be updated. This specification is required.

PreemptMode=<mode>

Reset the mechanism used to preempt jobs in this partition if PreemptType is configured to preempt/partition_prio. The default preemption mechanism is specified by the cluster-wide PreemptMode configuration parameter. Possible values are "OFF", "CANCEL", "REQUEUE" and "SUSPEND".

Priority=<count>

Jobs submitted to a higher priority partition will be dispatched before pending jobs in lower priority partitions and if possible they will preempt running jobs from lower priority partitions. Note that a partition's priority takes precedence over a job's priority. The value may not exceed 65533.

PriorityJobFactor=<count>

Partition factor used by priority/multifactor plugin in calculating job priority. The value may not exceed 65533. Also see PriorityTier.

PriorityTier=<count>

Jobs submitted to a partition with a higher priority tier value will be dispatched before pending jobs in partition with lower priority tier value and, if possible, they will preempt running jobs from partitions with lower priority tier values. Note that a partition's priority tier takes precedence over a job's priority. The value may not exceed 65533. Also see PriorityJobFactor.

QOS=<QOSname|blank to remove>

Set the partition QOS with a QOS name or to remove the Partition QOS leave the option blank.

ReqResv={yes|no}

Specify if only allocation requests designating a reservation will be satisfied. This is used to restrict partition usage to be allowed only within a reservation. Possible values are "YES" and "NO".

RootOnly={yes|no}

Specify if only allocation requests initiated by user root will be satisfied. This can be used to restrict control of the partition to some meta-scheduler. Possible values are "YES" and "NO".

Shared={yes|no|exclusive|force}[:<job_count>]

Renamed to OverSubscribe, see option descriptions above.

State={up|down|drain|inactive}

Specify if jobs can be allocated nodes or queued in this partition. Possible values are "UP", "DOWN", "DRAIN" and "INACTIVE".

TRESBillingWeights=<TRES Billing Weights>

TRESBillingWeights is used to define the billing weights of each TRES type that will be used in calculating the usage of a job. The calculated usage is used when calculating fairshare and when enforcing the TRES billing limit on jobs. Updates affect new jobs and not existing jobs. See the slurm.conf man page for more information.

RESERVATIONS - SPECIFICATIONS FOR CREATE, UPDATE, AND DELETE COMMANDS

Reservation=<name>

Identify the name of the reservation to be created, updated, or deleted. This parameter is required for update and is the only parameter for delete. For create, if you do not want to give a reservation name, use "scontrol create reservation ..." and a name will be created automatically.

Accounts=<account list>

List of accounts permitted to use the reserved nodes, for example "Accounts=physcode1,physcode2". A user in any of the accounts may use the reserved nodes. A new reservation must specify Users or Groups and/or Accounts. If both Users/Groups and Accounts are specified, a job must match both in order to use the reservation. Accounts can also be denied access to reservations by preceding all of the account names with '-'. Alternately precede the equal sign with '-'. For example, "Accounts=-physcode1,-physcode2" or "Accounts-=physcode1,physcode2" will permit any account except physcode1 and physcode2 to use the reservation. You can add or remove individual accounts from an existing reservation by using the update command and adding a '+' or '-' sign before the '=' sign. If accounts are denied access to a reservation (account name preceded by a '-'), then all other accounts are implicitly allowed to use the reservation and it is not possible to also explicitly specify allowed accounts.

BurstBuffer=<buffer_spec>[,<buffer_spec>,...]

Specification of burst buffer resources which are to be reserved. "buffer_spec" consists of four elements: [plugin:][type:]#[units] "plugin" is the burst buffer plugin name, currently either "datawarp" or "generic". If no plugin is specified, the reservation applies to all configured burst buffer plugins. "type" specifies a Cray generic burst buffer resource, for example "nodes". if "type" is not specified, the number is a measure of storage space. The "units" may be "N" (nodes), "K|KiB", "M|MiB", "G|GiB", "T|TiB", "P|PiB" (for powers of 1024) and "KB", "MB", "GB", "TB", "PB" (for powers of 1000). The default units are bytes for reservations of storage space. For example "BurstBuffer=datawarp:2TB" (reserve 2TB of storage plus 3 nodes from the Cray plugin) or "BurstBuffer=100GB" (reserve 100 GB of storage from all configured burst buffer plugins). Jobs using this reservation are not restricted to these burst buffer resources, but may use these reserved resources plus any which are generally available. NOTE: Usually Slurm interprets KB, MB, GB, TB, PB, TB units as powers of 1024, but for Burst Buffers size specifications Slurm supports both IEC/SI formats. This is because the CRAY API for managing DataWarps supports both formats.

CoreCnt=<num>

This option is only supported when SelectType=select/cons_res or select/cons_tres. Identify number of cores to be reserved. If NodeCnt is used without the FIRST_CORES flag, this is the total number of cores to reserve where cores per node is CoreCnt/NodeCnt. If a nodelist is used, or if NodeCnt is used with the FIRST_CORES flag, this should be an array of core numbers by node: Nodes=node[1-5] CoreCnt=2,2,3,3,4 or flags=FIRST_CORES NodeCnt=5 CoreCnt=1,2,1,3,2.

Licenses=<license>

Specification of licenses (or other resources available on all nodes of the cluster) which are to be reserved. License names can be followed by a colon and count (the default count is one). Multiple license names should be comma separated (e.g. "Licenses=foo:4,bar"). A new reservation must specify one or more resource to be included: NodeCnt, Nodes and/or Licenses. If a reservation includes Licenses, but no NodeCnt or Nodes, then the option Flags=LICENSE_ONLY must also be specified. Jobs using this reservation are not restricted to these licenses, but may use these reserved licenses plus any which are generally available.

MaxStartDelay[=<timespec>]

Change MaxStartDelay value which specifies the maximum time an eligible job not requesting this reservation can delay a job requesting it. Default is none. Valid formats are minutes, minutes:seconds, hours:minutes:seconds, days-hours, days-hours:minutes, days-hours:minutes:seconds. Time resolution is one minute and second values are rounded up to the next minute. Output format is always [days-]hours:minutes:seconds.

NodeCnt=<num>[,<num>,...]

Identify number of nodes to be reserved. The number can include a suffix of "k" or "K", in which case the number specified is multiplied by 1024. A new reservation must specify one or more resource to be included: NodeCnt, Nodes and/or Licenses.

Nodes=<name>

Identify the node(s) to be reserved. Multiple node names may be specified using simple node range expressions (e.g. "Nodes=lx[10-20]"). When using Nodes to specify more or fewer nodes, NodeCnt will be updated to honor the new number of nodes. However, when setting an empty list ("Nodes="), the nodelist will be filled with random nodes to fulfill the previous nodecnt and the SPEC_NODES flag will be removed. A new reservation must specify one or more resource to be included: NodeCnt, Nodes and/or Licenses. A specification of "ALL" will reserve all nodes. Set Flags=PART_NODES and PartitionName= in order for changes in the nodes associated with a partition to also be reflected in the nodes associated with a reservation. NOTE: When updating a reservation, if Nodes and Nodecnt are set simultaneously, nodecnt will always be honored. The reservation will get a subset of nodes if nodes > nodecnt, or it will add extra nodes to the list when nodes < nodecnt.

StartTime=<time_spec>

The start time for the reservation. A new reservation must specify a start time. It accepts times of the form HH:MM:SS for a specific time of day (seconds are optional). (If that time is already past, the next day is assumed.) You may also specify midnight, noon, fika (3 PM) or teatime (4 PM) and you can have a time-of-day suffixed with AM or PM for running in the morning or the evening. You can also say what day the job will be run, by specifying a date of the form MMDDYY or MM/DD/YY or MM.DD.YY, or a date and time as YYYY-MM-DD[THH:MM[:SS]]. You can also give times like now + count time-units, where the time-units can be seconds (default), minutes, hours, days, or weeks and you can tell Slurm to run the job today with the keyword today and to run the job tomorrow with the keyword tomorrow. You cannot update the StartTime of a reservation in ACTIVE state.

EndTime=<time_spec>

The end time for the reservation. A new reservation must specify an end time or a duration. Valid formats are the same as for StartTime.

Duration=<time>

The length of a reservation. A new reservation must specify an end time or a duration. Valid formats are minutes, minutes:seconds, hours:minutes:seconds, days-hours, days-hours:minutes, days-hours:minutes:seconds, or UNLIMITED. Time resolution is one minute and second values are rounded up to the next minute. Output format is always [days-]hours:minutes:seconds.

PartitionName=<name>

Partition used to reserve nodes from. This will attempt to allocate all nodes in the specified partition unless you request fewer resources than are available with CoreCnt, NodeCnt or TRES. Jobs will be allowed to use this reservation even if running in a different partition. There only needs to be overlapping nodes from that different partition and the nodes used in the reservation.

Flags=<flags>

Flags associated with the reservation. You can add or remove individual flags from an existing reservation by adding a '+' or '-' sign before the '=' sign. For example: Flags-=DAILY (NOTE: this shortcut is not supported for all flags). Currently supported flags include:

Features=<features>

Set the reservation's required node features. Multiple values may be "&" separated if all features are required (AND operation) or separated by "|" if any of the specified features are required (OR operation). Parenthesis are also supported for features to be ANDed together with counts of nodes having the specified features. For example " Features=[(knl&a2a&flat)*4&haswell*2]" indicates the advanced reservation should include 4 nodes with ALL of the features "knl", "a2a", and "flat" plus 2 nodes with the feature "haswell". Value may be cleared with blank data value, "Features=".

Groups=<group list>

List of groups permitted to use the reserved nodes, for example "Group=bio,chem". A new reservation must specify Users or Groups and/or Accounts. If both Users/Groups and Accounts are specified, a job must match both in order to use the reservation. Unlike users groups do not allow denied access to reservations. You can add or remove individual groups from an existing reservation by using the update command and adding a '+' or '-' sign before the '=' sign. NOTE: Groups and Users are mutually exclusive in reservations, if you want to switch between the 2 you must update the reservation with a group='' or user='' and fill in the opposite with the appropriate setting.

Skip

Used on a reoccurring reservation, skip to the next reservation iteration. NOTE: Only available for update.

Users=<user list>

List of users permitted to use the reserved nodes, for example "User=jones1,smith2". A new reservation must specify Users or Groups and/or Accounts. If both Users/Groups and Accounts are specified, a job must match both in order to use the reservation. Users can also be denied access to reservations by preceding all of the user names with '-'. Alternately precede the equal sign with '-'. For example, "User=-jones1,-smith2" or "User-=jones1,smith2" will permit any user except jones1 and smith2 to use the reservation. You can add or remove individual users from an existing reservation by using the update command and adding a '+' or '-' sign before the '=' sign. If users are denied access to a reservation (user name preceded by a '-'), then all other users are implicitly allowed to use the reservation and it is not possible to also explicitly specify allowed users. NOTE: Groups and Users are mutually exclusive in reservations, if you want to switch between the 2 you must update the reservation with a group='' or user='' and fill in the opposite with the appropriate setting.

TRES=<tres_spec>

Comma-separated list of TRES required for the reservation. Current supported TRES types with reservations are: CPU, Node, License and BB. CPU and Node follow the same format as CoreCnt and NodeCnt parameters respectively. License names can be followed by an equal '=' and a count: License/<name1>=<count1>[,License/<name2>=<count2>,...] BurstBuffer can be specified in a similar way as BurstBuffer parameter. The only difference is that colon symbol ':' should be replaced by an equal '=' in order to follow the TRES format. Some examples of TRES valid specifications: TRES=cpu=5,bb/cray=4,license/iop1=1,license/iop2=3 TRES=node=5k,license/iop1=2 As specified in CoreCnt, if a nodelist is specified, cpu can be an array of core numbers by node: nodes=compute[1-3] TRES=cpu=2,2,1,bb/cray=4,license/iop1=2 Please note that CPU, Node, License and BB can override CoreCnt, NodeCnt, Licenses and BurstBuffer parameters respectively. Also CPU represents CoreCnt, in a reservation and will be adjusted if you have threads per core on your nodes. Note that a reservation that contains nodes or cores is associated with one partition, and can't span resources over multiple partitions. The only exception from this is when the reservation is created with explicitly requested nodes.

PERFORMANCE

Executing scontrol sends a remote procedure call to slurmctld. If enough calls from scontrol 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 scontrol 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 scontrol to the minimum necessary for the information you are trying to gather.

ENVIRONMENT VARIABLES

Some scontrol 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.)

SCONTROL_ALL

-a, --all

SCONTROL_FEDERATION

--federation

SCONTROL_FUTURE

-F, --future

SCONTROL_LOCAL

--local

SCONTROL_SIBLING

--sibling

SLURM_BITSTR_LEN

Specifies the string length to be used for holding a job array's task ID expression. The default value is 64 bytes. A value of 0 will print the full expression with any length required. Larger values may adversely impact the application performance.

SLURM_CLUSTERS

Same as --clusters

SLURM_CONF

The location of the Slurm configuration file.

SLURM_CONF_OUT

When running 'write config', the location of the Slurm configuration file to be written.

SLURM_DEBUG_FLAGS

Specify debug flags for scontrol to use. See DebugFlags in the slurm.conf(5) man page for a full list of flags. The environment variable takes precedence over the setting in the slurm.conf.

SLURM_TIME_FORMAT

Specify the format used to report time stamps. A value of standard, the default value, generates output in the form "year-month-dateThour:minute:second". A value of relative returns only "hour:minute:second" if the current day. For other dates in the current year it prints the "hour:minute" preceded by "Tomorr" (tomorrow), "Ystday" (yesterday), the name of the day for the coming week (e.g. "Mon", "Tue", etc.), otherwise the date (e.g. "25 Apr"). For other years it returns a date month and year without a time (e.g. "6 Jun 2012"). All of the time stamps use a 24 hour format. A valid strftime() format can also be specified. For example, a value of "%a %T" will report the day of the week and a time stamp (e.g. "Mon 12:34:56").

SLURM_TOPO_LEN

Specify the maximum size of the line when printing Topology. If not set, the default value is unlimited.

AUTHORIZATION

When using SlurmDBD, users who have an AdminLevel defined (Operator or Admin) and users who are account coordinators are given the authority to view and modify jobs, reservations, nodes, etc., as defined in the following table - regardless of whether a PrivateData restriction has been defined in the slurm.conf file. scontrol show job(s): Admin, Operator, Coordinator scontrol update job: Admin, Operator, Coordinator scontrol requeue: Admin, Operator, Coordinator scontrol show step(s): Admin, Operator, Coordinator scontrol update step: Admin, Operator, Coordinator scontrol show node: Admin, Operator scontrol update node: Admin scontrol create partition: Admin scontrol show partition: Admin, Operator scontrol update partition: Admin scontrol delete partition: Admin scontrol create reservation: Admin, Operator scontrol show reservation: Admin, Operator scontrol update reservation: Admin, Operator scontrol delete reservation: Admin, Operator scontrol reconfig: Admin scontrol shutdown: Admin scontrol takeover: Admin

EXAMPLES

$ scontrol
scontrol: show part debug
PartitionName=debug
   AllocNodes=ALL AllowGroups=ALL Default=YES
   DefaultTime=NONE DisableRootJobs=NO Hidden=NO
   MaxNodes=UNLIMITED MaxTime=UNLIMITED MinNodes=1
   Nodes=snowflake[0-48]
   Priority=1 RootOnly=NO OverSubscribe=YES:4
   State=UP TotalCPUs=694 TotalNodes=49
scontrol: update PartitionName=debug MaxTime=60:00 MaxNodes=4
scontrol: show job 71701
JobId=71701 Name=hostname
   UserId=da(1000) GroupId=da(1000)
   Priority=66264 Account=none QOS=normal WCKey=*123
   JobState=COMPLETED Reason=None Dependency=(null)
   TimeLimit=UNLIMITED Requeue=1 Restarts=0 BatchFlag=0 ExitCode=0:0
   SubmitTime=2010-01-05T10:58:40 EligibleTime=2010-01-05T10:58:40
   StartTime=2010-01-05T10:58:40 EndTime=2010-01-05T10:58:40
   SuspendTime=None SecsPreSuspend=0
   Partition=debug AllocNode:Sid=snowflake:4702
   ReqNodeList=(null) ExcNodeList=(null)
   NodeList=snowflake0
   NumNodes=1 NumCPUs=10 CPUs/Task=2 ReqS:C:T=1:1:1
   MinCPUsNode=2 MinMemoryNode=0 MinTmpDiskNode=0
   Features=(null) Reservation=(null)
   OverSubscribe=OK Contiguous=0 Licenses=(null) Network=(null)
scontrol: update JobId=71701 TimeLimit=30:00 Priority=500
scontrol: show hostnames tux[1-3]
tux1
tux2
tux3
scontrol: create res StartTime=2009-04-01T08:00:00 Duration=5:00:00 Users=dbremer NodeCnt=10
Reservation created: dbremer_1
scontrol: update Reservation=dbremer_1 Flags=Maint NodeCnt=20
scontrol: delete Reservation=dbremer_1
scontrol: quit

COPYING

Copyright (C) 2002-2007 The Regents of the University of California. Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). Copyright (C) 2008-2010 Lawrence Livermore National Security. Copyright (C) 2010-2022 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.

FILES

/etc/slurm.conf

SEE ALSO

scancel(1), sinfo(1), squeue(1), slurm_create_partition (3), slurm_delete_partition (3), slurm_load_ctl_conf (3), slurm_load_jobs (3), slurm_load_node (3), slurm_load_partitions (3), slurm_reconfigure (3), slurm_requeue (3), slurm_resume (3), slurm_shutdown (3), slurm_suspend (3), slurm_takeover (3), slurm_update_job (3), slurm_update_node (3), slurm_update_partition (3), slurm.conf(5), slurmctld(8)