Disk Resource Table

This page is for the IT internal planning of disk resources for the LHC experiments, non-LHC experiments and various other groups.

The unit for all disk space number is [TB] and assumes usable disk space. The mentioned amount of space allocated is the sum of Castor and EOS space.

Experiment/Group   pledge 2014 expected September 2014 expected December 2014 pledge April 2015
             
ALICE   8100 9100 9100 14500
ATLAS   10000 12000 12000 14000
CMS   7000 8500 10000 15000
LHCb   4000 5500 5500 5500
             
TOTEM   200 200 200 400
             
ATLAS T3 CERN   1000 1000 1000 1400
CMS T3 CERN   1250 1250 1250 1600
LHCb T3 CERN   100 100 100 120
             
ATLAS T3 Wisconsin   2000 2000 2000 2000
ATLAS T3 Tokyo   4000 1000 2800 2800
             
COMPASS   1000 1000 1000 1200
AMS   5800 5800 5800 5800
NA48+NA62   300 300 500 1100
             
Public instance   2500 2500 2500 3100
test, debug, bench   2000 2000 2000 4000
E-Science   1000 200 400 1000
             
             
AFS   1500 1500 1500 2000
Ceph (3 copies)   1500 1500 1500 2500
Hadoop   1000 1000 1000 2000
Owncloud   0 0 0 0
             
total sum   54250 56250 59950 79820

Policies

  1. Usable space is either mirrored RAW space or 2 replicas (conversion factor is 2 between RAW and usable). Any changes in the algorithm or method do not change the pledge values for the experiments in terms of usable space.
  2. Special arrangements like the implementation of recycle bins or backup do not change the pledge of disk space. This has to be agreed with the experiment and the total available disk space is always a zero-sum game.
  3. The majority of disk space will be available in EOS and only a smaller 'fixed' part in Castor (~10 PB)
  4. The precision of the allocated disk space versus the pledge should not be varying more than +-3%

History and Changes

02. April 2014 allocated 500 TB of extra EOS space on loan for CMS for 2 month

-- BerndPanzerSteindel - 22 Apr 2014

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Topic revision: r3 - 2014-08-31 - BerndPanzerSteindel
 
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