bslots
Displays slots available and backfill windows available for backfill jobs.
Synopsis
bslots [-l] [-n slots] [-R "res_req"] [-W [hour:]minutes]Description
The available slots that are displayed by the bslots command are not used for running jobs and can be used for backfill jobs. The bslots command displays a snapshot of the slots not in use by parallel jobs or advance reservations. They might not be available at job submission.
No backfill window exists at this time
The bslots command calculates the backfill window based on the estimated start time of potential backfill jobs. Estimated start time is only relatively accurate according to current running job information. If running jobs finish earlier or later, estimated start time might be moved to earlier or later time. You might see a small delay of a few minutes between the job finish time on which the estimate was based and the actual start time of the allocated job.
If the available backfill window has no runtime limit, its length is displayed as UNLIMITED.
LSF does not calculate predicted start times for pending reserve jobs if no backfill queue is configured in the system. In that case, the resource reservation for pending jobs works as normal, but no predicted start time is calculated, and the bslots command does not show the backfill window.
Options
- -l
- Displays backfill windows in a long multi-line format. The -l option displays host names and the number of slots on each host available for backfill.
- -n slots
- Specifies required slots (processors). Backfill windows whose widths are equal or larger than
specified value are returned. When no slots are available for backfill, the bslots -n command displays the following message:
No backfill window meets these requirements at this time - -R "res_req"
Selects hosts for calculating the backfill windows according to the specified resource requirement. By default, selects hosts of any type. The -R option supports only the select resource requirement string. Other resource requirement sections are not supported.
The selection string must conform to the strict resource requirement string syntax described in Administering IBM Spectrum LSF. The strict resource requirement syntax applies to only the select section.
When no slots are available for backfill, the bslots -R command displays the following message:No backfill window meets these requirements at this time- -W [hour:]minutes
- Specifies expected runtime limit. Backfill windows whose lengths are equal or larger than
specified value are returned.When no slots are available for backfill, the bslots -W command displays the following message:
No backfill window meets these requirements at this time - -h
- Prints command usage to stderr and exits.
- -V
- Prints LSF release version to stderr and exits.