Known issues: Difference between revisions

* The CC slurm configuration preferentially encourages whole-node jobs. Users should if possible request whole-nodes rather than per-core resources. See [[Job_scheduling_policies#Whole_nodes_versus_cores;|Job Scheduling - Whole Node Scheduling]] ([[User:Pjmann|Patrick Mann]] 20:15, 17 July 2017 (UTC))

** Cpu and Gpu backfill partitions have been created on both clusters. If a job is submitted with <24hr runtime, it will be automatically entered into the cluster-wide backfill partition. This partition has a low priority, but will allow increased utilization of the cluster by serial jobs. ([[User:Nathanw|Nathan Wielenga]])

* SLURM epilog does not fully clean up processes from ended jobs, especially if the job did not exit normally.    ([[User:Gbnewby|Greg Newby]]) Fri Jul 14 19:32:48 UTC 2017)

* Operations will occasionally time out with a message like "Socket timed out on send/recv operation" or "Unable to contact slurm controller (connect failure)". As a temporary workaround, attempt to resubmit your jobs/commands, they should go through in a few seconds. ([[User:Nathanw|Nathan Wielenga]]) 08:50, 18 July 2017 (MDT))

** Should be resolved after a VHD migration to a new backend for slurmctl. (NW)

Sometimes, users will see quota error on their project folders. This is because the group that owns the files is not the project group. You can change the group which owns files using the command

{{Command|chgrp -R <group> <folder>}}

Only the owner of the files can run the <tt>chgrp</tt> command. To ask us to correct the group owner for many users, write to support@computecanada.ca

* "Nearline" capabilities are not yet available (see https://docs.computecanada.ca/wiki/National_Data_Cyberinfrastructure for a brief description of the intended functionality)

** Update July 17: still not working. If you need your nearline RAC2017 quota then please ask [mailto:support@computecanada.ca CC support]. ([[User:Pjmann|Patrick Mann]] 20:45, 17 July 2017 (UTC))