flux-jobs(1)¶

SYNOPSIS¶

flux jobs [OPTIONS] [JOBID ...]

DESCRIPTION¶

flux-jobs(1) is used to list jobs run under Flux. By default only pending and running jobs for the current user are listed. Additional jobs and information can be listed using options listed below. Alternately, specific job ids can be listed on the command line to only list those job IDs.

OPTIONS¶

-a

List jobs in all states, including inactive jobs. This is shorthand for --filter=pending,running,inactive.

-A

List jobs of all users. This is shorthand for --user=all.

-n, --suppress-header

For default output, do not output column headers.

-u, --user=[USERNAME|UID]

List jobs for a specific username or userid. Specify all for all users.

-c, --count=N

Limit output to N jobs (default 1000)

-f, --filter=STATE|RESULT

List jobs with specific job state or result. Multiple states or results can be listed separated by comma. See JOB STATUS below for additional information. Defaults to pending,running.

-o, --format=FORMAT

Specify output format using Python's string format syntax. See OUTPUT FORMAT below for field names.

--color=WHEN

Control output coloring. WHEN can be never, always, or auto. Defaults to auto.

--stats

Output a summary of global job statistics before the header. May be useful in conjunction with utilities like watch(1), e.g.:

$ watch -n 2 flux jobs --stats -f running -c 25

will display a summary of global statistics along with the top 25 running jobs, updated every 2 seconds.

--stats-only

Output a summary of global job statistics and exit. flux jobs will exit with non-zero exit status with --stats-only if there are no active jobs. This allows the following loop to work:

$ while flux jobs --stats-only; do sleep 2; done

All other options are ignored when --stats-only is used.

-R, --recursive

List jobs recursively. Each child job which is also an instance of Flux is prefixed by its jobid "path" followed by the list of jobs, recursively up to any defined -L, --level. If the --stats option is used, then each child instance in the hierarchy is listed with its stats.

--recurse-all

By default, jobs not owned by the user running flux jobs are skipped with -R, --recursive, because normally Flux instances only permit the instance owner to connect. This option forces the command to attempt to recurse into the jobs of other users. Implies --recursive.

-L, --level=N

With -R, --recursive, stop recursive job listing at level N. Levels are counted starting at 0, so flux jobs -R --level=0 is equivalent to flux jobs without -R, and --level=1 would limit recursive job listing to child jobs of the current instance.

--threads=N

When flux jobs recursively queries job lists (with --recursive) or fetches info for jobs that are also instances (see instance.* fields), a pool of threads is used to parallelize the required RPCs. Normally, the default number of ThreadPoolExecutor threads is used, but by using the --threads, a specific number of threads can be chosen.

JOB STATUS¶

Jobs may be observed to pass through five job states in Flux: DEPEND, SCHED, RUN, CLEANUP, and INACTIVE (see Flux RFC 21). Under the state_single field name, these are abbreviated as D, S, R, C, and I respectively. For convenience and clarity, the following virtual job states also exist: "pending", an alias for DEPEND,SCHED; "running", an alias for RUN,CLEANUP; "active", an alias for "pending,running".

After a job has finished and is in the INACTIVE state, it can be marked with one of three possible results: COMPLETED, FAILED, CANCELED. Under the result_abbrev field name, these are abbreviated as CD, F, and CA respectively.

The job status is a user friendly mix of both, a job is always in one of the following five statuses: PENDING, RUNNING, COMPLETED, FAILED, or CANCELED. Under the status_abbrev field name, these are abbreviated as P, R, CD, F, and CA respectively.

OUTPUT FORMAT¶

The --format option can be used to specify an output format to flux-jobs(1) using Python's string format syntax. For example, the following is the format used for the default format:

{id.f58:>12} {username:<8.8} {name:<10.10} {status_abbrev:>2.2} {ntasks:>6} {nnodes:>6h} {runtime!F:>8h} {nodelist:h}

The special presentation type h can be used to convert an empty string, "0s", "0.0", or "0:00:00" to a hyphen. For example, normally "{nodelist}" would output an empty string if the job has not yet run. By specifying, "{nodelist:h}", a hyphen would be presented instead.

Additionally, the custom job formatter supports a set of special conversion flags. Conversion flags follow the format field and are used to transform the value before formatting takes place. Currently, the following conversion flags are supported by flux-jobs:

!D: convert a timestamp field to ISO8601 date and time (e.g. 2020-01-07T13:31:00). Defaults to empty string if timestamp field does not exist.
!d: convert a timestamp to a Python datetime object. This allows datetime specific format to be used, e.g. {t_inactive!d:%H:%M:%S}. However, note that width and alignment specifiers are not supported for datetime formatting. Defaults to datetime of epoch if timestamp field does not exist.
!F: convert a duration in floating point seconds to Flux Standard Duration (FSD). string. Defaults to empty string if duration field does not exist.
!H: convert a duration to hours:minutes:seconds form (e.g. {runtime!H}). Defaults to empty string if duration field does not exist.
!P: convert a floating point number into a percentage fitting in 5 characters including the "%" character. E.g. 0.5 becomes "50%" 0.015 becomes 1.5%, and 0.0005 becomes 0.05% etc.

Annotations can be retrieved via the annotations field name. Specific keys and sub-object keys can be retrieved separated by a period ("."). For example, if the scheduler has annotated the job with a reason pending status, it can be retrieved via "{annotations.sched.reason_pending}".

As a convenience, the field names sched and user can be used as substitutions for annotations.sched and annotations.user. For example, a reason pending status can be retrieved via "{sched.reason_pending}".

As a reminder to the reader, some shells may interpret special characters in Python's string format syntax. The format may need to be quoted or escaped to work under certain shells.

The field names that can be specified are:

id: job ID
id.f58: job ID in RFC 19 F58 (base58) encoding
id.hex: job ID in 0x prefix hexadecimal representation
id.dothex: job ID in dotted hexadecimal representation (xx.xx.xx.xx)
id.words: job ID in mnemonic encoding
userid: job submitter's userid
username: job submitter's username
urgency: job urgency
priority: job priority
dependencies: list of any currently outstanding job dependencies
status: job status (PENDING, RUNNING, COMPLETED, FAILED, or CANCELED)
status_abbrev: status but in a max 2 character abbreviation
name: job name
ntasks: job task count
nnodes: job node count (if job ran / is running), empty string otherwise
ranks: job ranks (if job ran / is running), empty string otherwise
nodelist: job nodelist (if job ran / is running), empty string otherwise
state: job state (DEPEND, SCHED, RUN, CLEANUP, INACTIVE)
state_single: job state as a single character
result: job result if job is inactive (COMPLETED, FAILED, CANCELED), empty string otherwise
result_abbrev: result but in a max 2 character abbreviation
success: True of False if job completed successfully, empty string otherwise
waitstatus: The raw status of the job as returned by waitpid(2) if the job exited, otherwise an empty string. Note: waitstatus is the maximum wait status returned by all job shells in a job, which may not necessarily indicate the highest task wait status. (The job shell exits with the maximum task exit status, unless a task died due to a signal, in which case the shell exits with 128+signo)
returncode: The job return code if the job has exited, or an empty string if the job is still active. The return code of a job is the highest job shell exit code, or negative signal number if the job shell was terminated by a signal. If the job was canceled before it started, then the returncode is set to the special value -128.
exception.occurred: True of False if job had an exception, empty string otherwise
exception.severity: If exception.occurred True, the highest severity, empty string otherwise
exception.type: If exception.occurred True, the highest severity exception type, empty string otherwise
exception.note: If exception.occurred True, the highest severity exception note, empty string otherwise
t_submit: time job was submitted
t_depend: time job entered depend state
t_run: time job entered run state
t_cleanup: time job entered cleanup state
t_inactive: time job entered inactive state
runtime: job runtime
expiration: time at which job allocation was marked to expire
t_remaining: If job is running, amount of time remaining before expiration
annotations: annotations metadata, use "." to get specific keys
sched: short hand for annotations.sched
user: short hand for annotations.user

Field names which are specific to jobs which are also instances of Flux include:

instance.stats: a short string describing current job statistics for the instance of the form PD:{pending} R:{running} CD:{successful} F:{failed}
instance.stats.total: total number of jobs in any state in the instance.
instance.utilization: number of cores currently allocated divided by the total number of cores. Can be formatted as a percentage with !P, e.g. {instance.utilization!P:>4}.
instance.gpu_utilization: same as instance.utilization but for gpu resources
instance.progress: number of inactive jobs divided by the total number of jobs. Can be formatted as a percentage with {instance.progress!P:>4}
instance.resources.<state>.{ncores,ngpus}: number of cores, gpus in state state, where state can be all, up, down, allocated, or free, e.g. {instance.resources.all.ncores}

EXAMPLES¶

The default output of flux-jobs(1) will list the pending and running jobs of the current user. It is equivalent to:

$ flux jobs --filter=pending,running

To list all pending, running, and inactive jobs, of the current user, you can use --filter option or the -a option:

$ flux jobs -a

OR

$ flux jobs --filter=pending,running,inactive

To alter which user's jobs are listed, specify the user with --user:

$ flux jobs --user=flux

Jobs that have finished may be filtered further by specifying if they have completed, failed, or were canceled. For example, the following will list the jobs that have failed or were canceled:

$ flux jobs --filter=failed,canceled

The --format option can be used to alter the output format or output additional information. For example, the following would output all jobids for the user in decimal form, and output any annotations the scheduler attached to each job:

$ flux jobs -a --format="{id} {annotations.sched}"

The following would output the job id and exception information, so a user can learn why a job failed.

$ flux jobs --filter=failed --format="{id} {exception.type} {exception.note}"

RESOURCES¶

Flux: http://flux-framework.org