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Niagara Quickstart: Difference between revisions
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<li>Regardless, your usage will be counted as 40xNx(walltime in years).</li> | <li>Regardless, your usage will be counted as 40xNx(walltime in years).</li> | ||
</ul> | </ul> | ||
== Limits == | |||
There are limits to the size and duration of your jobs, the number of jobs you can run and the number of jobs you can have queued. It matters whether a user is part of a group with a [https://www.computecanada.ca/research-portal/accessing-resources/resource-allocation-competitions/ Resources for Research Group allocation] or not. It also matters in which 'partition' the jobs runs. 'Partitions' are SLURM-speak for use cases. You specify the partition with the <tt>-p</tt> parameter to <tt>sbatch</tt> or <tt>salloc</tt>, but if you do not specify one, your job will run in the <tt>compute</tt> partition, which is the most common case. | |||
{| class="wikitable" | |||
!Usage | |||
!Partition | |||
!Running jobs | |||
!Submitted jobs (incl. running) | |||
!Min. size of jobs | |||
!Max. size of jobs | |||
!Min. walltime | |||
!Max. walltime | |||
|- | |||
|Compute jobs with an allocation||compute || 50 || 1000 || 1 node (40 cores) || 1000 nodes (40000 cores)|| 15 minutes || 24 hours | |||
|- | |||
|Compute jobs without allocation ("default")||compute || 50 || 200 || 1 node (40 cores) || 20 nodes (800 cores)|| 15 minutes || 12 hours | |||
|- | |||
|Testing or troubleshooting || debug || 1 || 1 || 1 node (40 cores) || 4 nodes (160 cores)|| N/A || 1 hour | |||
|- | |||
|Archiving or retrieving data in [[HPSS]]|| archivelong || 2 per user (max 5 total) || 10 per user || N/A || N/A|| 15 minutes || 72 hours | |||
|- | |||
|Inspecting archived data, small archival actions in [[HPSS]] || archiveshort || 2 per user|| 10 per user || N/A || N/A || 15 minutes || 1 hour | |||
|} | |||
Within these limits, jobs will still have to wait in the queue. The waiting time depends on many factors such as the allocation amount, how much allocation was used in the recent past, the number of nodes and the walltime, and how many other jobs are waiting in the queue. | |||
== Example submission script (OpenMP) == <!--T:87--> | == Example submission script (OpenMP) == <!--T:87--> | ||