Known issues

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Revision as of 12:26, 13 December 2017 by Mboisson (talk | contribs)
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Shared issues

Scheduler issues

  • Interactive jobs started via salloc require X11 forwarding to be enabled when you connect to the cluster. On Linux and MacOS, you can typically enable X11 forwarding by adding the option -X or -Y to your ssh command. If you do not have X11 forwarding capabilities, you can use the command srun --pty bash as the command to be run by salloc. For example: salloc --time=1:00:00 --ntasks=1 srun --pty bash (Maxime Boissonneault (talk) 12:26, 13 December 2017 (UTC))
  • The CC Slurm configuration encourages whole-node jobs. When appropriate, users should request whole-node rather than per-core resources. See Job Scheduling - Whole Node Scheduling.
  • 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 #SBATCH --export=NONE to your job script.

Quota and filesystem problems

Quota errors on /project filesystem

Nearline

Missing symbolic links to project folders

Cedar only

Nothing to report at this time.

Graham only

  • /home is on an NFS appliance that does not support ACLs, so setfacl/getfacl doesn't work there.
    • Workaround: use the /project or /scratch filesystems instead.
    • Might be resolved by an update or reconfiguration.
  • diskusage_report (and alias 'quota') do not report on Graham /home (FIXED as of 2017-11-27)
  • Compute nodes cannot access Internet
    • Solution: Contact technical support to request exceptions to be made; describe what you need to access and why.
  • Crontab is not offered on Graham.

Other issues

  1. Modules don't work for shells other than bash(sh) and tcsh.
    • Workaround: (this appears to work but not tested extensively)
      • source $LMOD_PKG/init/zsh
      • source $LMOD_PKG/init/ksh