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High Performance Computing

University Information Services

Studying at Cambridge

 

Storage policies

User space is limited on the home directory filesystem (/home) to 40 GB per user. The contents of this filesystem are backed up daily, meaning that damaged or accidentally deleted files can be restored (with certain restrictions and for a limited amount of time).

Each user has access to a large high performance scratch filesystem available under /scratch/<user-dir>. Currently there is a 1TB quota imposed by default per user on scratch but we reserve the right to change that policy at any time. The /scratch filesystem is not backed up and its primary use is for data processing. Any critical data should be backed up using other means. 

The amount of space currently being used can be seen via the command quota:

[cvsupport@bindloe04 ~]$ quota
====================================================================================
Usage on /home (lfs quota -u cvsupport /home):
====================================================================================
Disk quotas for user cvsupport (uid 589):
     Filesystem  kbytes   quota   limit   grace   files   quota   limit   grace
          /home 7191072  41943040 47185920           40843       0       0        
====================================================================================
Usage on /scratch (lfs quota -u cvsupport /scratch):
====================================================================================
Disk quotas for user cvsupport (uid 589):
     Filesystem  kbytes   quota   limit   grace   files   quota   limit   grace
       /scratch     220       0       0               3       0       0        
====================================================================================

Where:

kbytes      ->  Number of kilobytes currently in use (in KB)
quota       ->  Soft limit (in KB)
limit       ->  Hard limit (in KB)

Note that this command will only provide information about the user who invokes it.