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 (mirrored/replicated). The mentioned amount of space allocated is the sum of Castor and EOS space.

Experiment/Group   pledge April 2015 expected July 2015 expected December 2015 pledge April 2016
             
ALICE   14500 14500 14500 16900
ATLAS   14000 14000 14000 17000
CMS   15000 15000 15000 16000
LHCb   5500 5500 5500 7600
             
TOTEM   400 400 400 600
             
ATLAS T3 CERN   1400 1400 1400 1800
CMS T3 CERN   1600 1600 1600 2000
LHCb T3 CERN   200 200 200 300
             
ATLAS T3 Wisconsin   2000 2000 2000 2000
ATLAS T3 Tokyo   3000 3000 3000 3000
             
COMPASS   1200 1200 1200 1400
AMS   3000 3000 3000 3000
NA48+NA62   1100 1100 1100 2100
             
Public instance   2000 2000 2000 2500
test, debug, bench   4000 4000 4000 6000
E-Science   500 500 500 500
             
             
AFS   2000 2000 2000 2500
Ceph   2000 2000 2000 3000
Hadoop   2000 2000 2000 3000
Owncloud   100 100 100 10 0
             
total sum   76400 76400 76400 95100

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: r4 - 2015-01-27 - BerndPanzerSteindel
 
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