Known issues: Difference between revisions

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== Intro == <!--T:1-->
* Please report issues to [mailto:support@computecanada.ca support@computecanada.ca]


== Shared issues == <!--T:2-->
<!--T:15-->
* 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))
Problems that affect many users and are being investigated, such as a cluster-wide malfunction or outage, are on [https://status.alliancecan.ca/ the Alliance Status page]. This "Known issues" page describes problems that affect many users but that may take some time to repair, or are not planned for repair at this time. Problems that only affect a specific software package are described on the wiki page for that software package.  
** 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]])
* Quotas on <code>/project</code> are all 1 TB. The Storage National team is working on a project/RAC based schema. Fortunately Lustre have announced group-based quotas but that will need installation. ([[User:Pjmann|Patrick Mann]] 20:12, 17 July 2017 (UTC))
* 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)
* The status page at http://status.computecanada.ca/ is not updated automatically yet, so does not necessarily show correct, current status.
* "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))
* 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)


=== Quota errors ===
==Report an issue== <!--T:1-->
Sometimes, users will see quota error on their project folders. This is because the group that owns the files is not the project group. To ask us to correct this, write to support@computecanada.ca
Please report issues to the [[Technical Support|technical support]] team.


== Cedar only == <!--T:3-->
==Shared issues== <!--T:2-->
*
The [https://status.alliancecan.ca/ status page] is updated manually, so there may be a delay between when a problem begins and when it is posted to the status page.


== Graham only == <!--T:4-->
===Scheduler issues=== <!--T:6-->
* Custom file ACLs do not work on /home
 
** Solution/workaround: use the /project or /scratch filesystems instead
<!--T:14-->
* Compute nodes cannot access Internet
No known issues.
** Solution: Request exceptions to be made at support@computecanada.ca  Describe what you need to access and why.
 
===Quota and filesystem issues=== <!--T:7-->
 
====Missing project folder==== <!--T:11-->
Upon creation of a new account for a Principal Investigator, the [[Project layout|<code>/project</code>]] storage space might not be allocated until the next business day.
 
==Cluster-specific issues== <!--T:17-->
 
===Béluga=== <!--T:16-->
No known issues.
 
===Cedar=== <!--T:3-->
No known issues.
 
===Graham=== <!--T:4-->
Graham's /scratch is often slow; it will be replaced soon.
 
===Narval=== <!--T:18-->
No known issues.


== Other issues == <!--T:5-->
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Latest revision as of 18:06, 25 October 2024

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Problems that affect many users and are being investigated, such as a cluster-wide malfunction or outage, are on the Alliance Status page. This "Known issues" page describes problems that affect many users but that may take some time to repair, or are not planned for repair at this time. Problems that only affect a specific software package are described on the wiki page for that software package.

Report an issue

Please report issues to the technical support team.

Shared issues

The status page is updated manually, so there may be a delay between when a problem begins and when it is posted to the status page.

Scheduler issues

No known issues.

Quota and filesystem issues

Missing project folder

Upon creation of a new account for a Principal Investigator, the /project storage space might not be allocated until the next business day.

Cluster-specific issues

Béluga

No known issues.

Cedar

No known issues.

Graham

Graham's /scratch is often slow; it will be replaced soon.

Narval

No known issues.

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