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CERN Bluearc Quota and Usage Statistics

The Tier 1 Facility provides several file sytems for its users at CERN. These file sytems are configured in different ways for different purposes. Information is provided below on purpose and configuration differences, quota and usage statistics and instructions on how to check your quota.
To gain access to one of these file systems please send email with your request to USCMS Request for disk at CERN

BlueArc Space

/tas 


Purpose: Dedicated space for the TAS project; not backed up
  1. Stats sorted by usage
  2. Stats sorted by quota limit set
  3. Stats sorted by percentage of limit used

/mit


Purpose: Dedicated space for the MIT project; not backed up
  1. Stats sorted by usage
  2. Stats sorted by quota limit set
  3. Stats sorted by percentage of limit used

/scratch


Purpose: Non-backed up general purpose area available for those not affiliated any of the above project groups. Users must reside at CERN and be able to mount this area on their desktop system. Requests for access should be directed to USCMS Request for disk at CERN
  1. Stats sorted by usage
  2. Stats sorted by quota limit set
  3. Stats sorted by percentage used

Checking your quota usage on NFS mounted areas (Bluearc):

  Users can use the UNIX "quota" command to check their disk/quota usage. The output includes information on ALL nfs mounted file systems even those that may not have quotas set.
An example:  
<> quota -s
quota: Error while getting quota from cmspnfs:/cms for 1291: Invalid argument
quota: Error while getting quota from cmsstor37:/uscmst1/prod for 1291: Invalidargument
Disk quotas for user lisa (uid 1291):
     Filesystem  blocks   quota   limit   grace   files   quota   limit   grace
cmsblue2.fnal.gov:/uscmst1b_scratch/lpc1
                  8826G       0  14336G            944k       0       0
cmsblue1.fnal.gov:/uscms_data/d2
                     32       0  20480M           8749k       0       0
cmsblue1.fnal.gov:/uscms
                    864       0   2048M              41       0       0

The "-s" option tells the quota command to try to use units for showing the usage/limit output.
The errors in the output are normal. The two pertinent fields in this output are the first and third. The first shows how much disk is being used and the third shows what your limit is set to. As you can see in the example /uscmst1b_scratch/lpc1 shows a very high limit for this user. This is due to the fact that a default quota was set on this file system so we could use the quota facility to track individual users disk usage without actually limiting any one user or groups usage.
There is another useful option to the quota command which is the "-q". This option tells the quota command to only print information about file systems where you are over quota.
Webmaster | Last modified: Thursday, 04-Aug-2011 11:47:24 CDT