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 status Nov 2018   pledge April 2019 pledge April 2020
         
ALICE 31180   31200 31200
ATLAS 27450   27000 27000
CMS 26460   26100 26100
LHCb 12350   12400 12400
         
TOTEM 400   600 600
         
ATLAS T3 CERN 1800   2000 2000
CMS T3 CERN 2000   2200 2200
LHCb T3 CERN 200   300 300
         
CMS opendata 1000   1000 1000
ATLAS opendata 1000   1000 1000
         
ATLAS T3 Wisconsin 500   300 300
ATLAS T3 Tokyo 3000   3000 3000
         
COMPASS 2000   2500 2500
AMS 6000   7000 8000
NA62 4000   4000 4000
         
Public instance,other 6290   6500 6500
         
total sum 125230   126700 127700

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%

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Topic revision: r16 - 2018-11-18 - BerndPanzerSteindel
 
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