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 Feb 2018 pledge April 2018 pledge April 2019 pledge April 2020
         
ALICE 27800 26200 +2000 26200 26200
ATLAS 26700 27000 2700 27000
CMS 27000 26100 26100 26100
LHCb 12600 11400 11400 11400
         
TOTEM 400 600 600 600
         
ATLAS T3 CERN 1800 2000 2000 2000
CMS T3 CERN 2000 2200 2200 2200
LHCb T3 CERN 200 300 300 300
         
CMS opendata 1000 2000 3000 5000
ATLAS opendata 1000 2000 3000 5000
         
ATLAS T3 Wisconsin 2000 1000 0 0
ATLAS T3 Tokyo 3000 3000 3000 3000
         
COMPASS 2000 2500 2500 2500
AMS 6000 7000 8000 9000
NA48+NA62 2500 3500 3000 3000
         
Public instance,other 2000 3000 4000 5000
         
total sum 118000 122000 122300 128300

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: r15 - 2018-02-18 - BerndPanzerSteindel
 
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