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Known issues/en: Difference between revisions
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= Shared issues = | = Shared issues = | ||
* The status page at http://status.computecanada.ca/ is not updated automatically yet, so | * The status page at http://status.computecanada.ca/ is not updated automatically yet, so may lag in showing current status. | ||
== Scheduler errors == | == Scheduler errors == | ||
* The CC slurm configuration preferentially encourages whole-node jobs. Users should if | * The CC slurm configuration preferentially encourages whole-node jobs. Users should, if appropriate, request whole-node 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) | * 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) | ||
* | ** This has been greatly improved after the addition of the epilog.clean script, but there are still nodes occasionally marked down for epilog failure. (NW) | ||
** Should be resolved after a VHD migration to a new backend for slurmctl. (NW) | ** Should be resolved after a VHD migration to a new backend for slurmctl. (NW) | ||
* | * By default, the job receives environment settings from the submitting shell. This can lead to irreproducible results if it's not what you expect. To force the job to run with a fresh-like-login environment, you can submit with --export=none or add <tt>#SBATCH --export=NONE</tt> to your job script. | ||
== Quota and filesystem problems == | == Quota and filesystem problems == | ||
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* "Nearline" capabilities are not yet available (see https://docs.computecanada.ca/wiki/National_Data_Cyberinfrastructure for a brief description of the intended functionality) | * "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)) | ** 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)) | ||
=== Missing symbolic links to project folders === | |||
* Upon login to the new clusters, symbolic links are supposed to be created in the user's account, as described in [[Project layout]]. Sometimes, it does not happen. If this is the case, please verify that your access to the cluster is enabled on this page [https://ccdb.computecanada.ca/services/resources https://ccdb.computecanada.ca/services/resources] | |||
= Cedar only = | = Cedar only = | ||
* | * SLURM 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)) | ||
= Graham only = | = Graham only = | ||
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= Other issues = | = Other issues = | ||
#modules don't work for shells other than bash(sh) | |||
#*Workaround (this appears to work but not tested extensively) | |||
#**source $LMOD_PKG/init/tcsh | |||
#**source $LMOD_PKG/init/zsh | |||
#**source $LMOD_PKG/init/ksh | |||
#*Bart will look at it in more detail | |||