Difference between revisions of "Usage policy"

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* If you try to run <code>ls</code> on either the <code>/home</code>, <code>/shared</code>, or <code>/misc/cnXX</code> directories, you might not see them. <!--
 
* If you try to run <code>ls</code> on either the <code>/home</code>, <code>/shared</code>, or <code>/misc/cnXX</code> directories, you might not see them. <!--
 
-->They are invisible because they are mounted on demand by <code>autofs</code>, when an attempt is made to access a file under the directory, or using <code>cd</code> to enter the directory structure.
 
-->They are invisible because they are mounted on demand by <code>autofs</code>, when an attempt is made to access a file under the directory, or using <code>cd</code> to enter the directory structure.
* One can [[Recover deleted files]] within 1-2 weeks from backed up directories.
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* You can [[recover deleted files|recover files on your own from our backed up directories]] using our snapshots within 2 weeks.  Beyond 2 weeks we may be able to help if you [[:Category:Help|contact us]].
* You can check on your [[Cannot_write_to_home_directory|home directory quota]].
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* You can check on your [[Cannot write to home directory|home directory quota]].
  
 
= Scheduled Jobs =
 
= Scheduled Jobs =
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* We strong discourage programs being run on the cluster without the slurm scheduler.
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* We strongly discourage programs being run on the cluster without the slurm scheduler.
 
* Programs on the compute nodes are not allowed.
 
* Programs on the compute nodes are not allowed.
 
* Some programs are allowed on the login node only:<div style="column-count:4;-moz-column-count:4;-webkit-column-count:4">
 
* Some programs are allowed on the login node only:<div style="column-count:4;-moz-column-count:4;-webkit-column-count:4">

Revision as of 15:14, 26 August 2015

To be fair to all users of the cluster, please be aware of these resource limits and usage expectations.

Storage

Name Path Size (GB) Persistence Backed up? Purpose
Home ~ 2 Permanent Yes Personal storage, available on every node
Group /shared By request Permanent Yes Group storage for collaborative work
Fast /scratch 220,000 (shared) 2 weeks No Fast RAID-0 storage, generally for result files
Local to node /work 100 5 days No Useful for large intermediate files, globally accessible from /misc/cnXX
  • Data deletion is based on modification time. You will get 3 warnings before deletion if your files or directories are expired.
  • If you try to run ls on either the /home, /shared, or /misc/cnXX directories, you might not see them. They are invisible because they are mounted on demand by autofs, when an attempt is made to access a file under the directory, or using cd to enter the directory structure.
  • You can recover files on your own from our backed up directories using our snapshots within 2 weeks. Beyond 2 weeks we may be able to help if you contact us.
  • You can check on your home directory quota.

Scheduled Jobs

Jobs submitted through the slurm scheduler:

Job property Standard Limit Longrun Limit
Run time (hours) 36 72
Cores / CPUs 48
Nodes 4

Unscheduled programs

Node Run time (minutes) CPU limit Memory limit
Login node 30 5% 5% (or 3.2 GB)
Compute node 10 Not allowed on compute nodes!
  • We strongly discourage programs being run on the cluster without the slurm scheduler.
  • Programs on the compute nodes are not allowed.
  • Some programs are allowed on the login node only:
    • bzip
    • cp
    • du
    • emacs
    • fort
    • gcc
    • gfortran
    • gunzip
    • gzip
    • icc
    • mv
    • sftp
    • smbclient
    • ssh
    • tar
    • vim
    • wget
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