RAL Tier1 Experiments Liaison Meeting

Access Grid (RAL R89)

Access Grid


RAL Tier1 Experiments Liaison Meeting
Zoom Meeting ID
Alastair Dewhurst
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Zoom URL
    • 1:38 PM 1:39 PM
      Major Incidents Changes 1m
    • 1:39 PM 1:40 PM
      Summary of Operational Status and Issues 1m


      Speakers: Brian Davies (Lancaster University (GB)) , Darren Moore (Science and Technology Facilities Council STFC (GB))
    • 1:40 PM 1:41 PM
      GGUS /RT Tickets 1m


    • 1:41 PM 1:42 PM
      Site Availability 1m




    • 1:42 PM 1:43 PM
      Experiment Operational Issues 1m
    • 1:44 PM 1:45 PM
      VO-Liaison ATLAS 1m
      Speakers: James William Walder (Science and Technology Facilities Council STFC (GB)) , Dr Tim Adye (Science and Technology Facilities Council STFC (GB))

      ATLAS requesting 20GB/core max work dir size to help with merging jobs:
      Should be ok on all tranches; 2019 a bit tight, if Xcache is included. 

      wv-2019-dell: 3.2T for 128 nodes; e.g. 25 GB/core
      wn-2018-xma:  3.3T / 64: 50
      wn-2017-dell: 3.5T / 64 
      wn-2017-xma:  3.3T / 56 
      wn-2016-dell: 5.0T / 40  (+running reduced slots)
      wn-2015-xma:  3.4T / 32 (+running reduced slots)
      wn-2015-hpe:  3.4T / 32 (+running reduced slots)
      wn-2014-viglen-highmem: 3.4T / 32 (+running reduced slots)


      Major problems with Rucio on Monday night; put sites into test till afternoon. 


      Still need to discuss about the RAL / ATLAS discrepancy of HS06 values (

    • 1:46 PM 1:47 PM
      VO Liaison CMS 1m
      Speaker: Katy Ellis (Science and Technology Facilities Council STFC (GB))

      Some SAM test SRM/tape endpoint failures on Monday/Tuesday. Castor team found there were a lot of requests in the system and it was having an impact on all VOs. Possibly caused by some tests being performed by LHCb, reading from Castor buffer, but there were also a lot of reads from NA62.

      Job efficiency is going through a good period, this is due to a job mix including a very large proportion of GEN-SIM jobs which do not use significant I/O.

    • 1:48 PM 1:49 PM
      VO Liaison LHCb 1m
      Speaker: Raja Nandakumar (Science and Technology Facilities Council STFC (GB))
    • 1:52 PM 1:53 PM
      VO Liaison Others 1m
    • 1:53 PM 1:54 PM
      Experiment Planning 1m
    • 1:54 PM 1:55 PM
      Dune/protoDune 1m
    • 1:55 PM 1:56 PM
      Euclid 1m
    • 1:56 PM 1:57 PM
      SKA 1m
    • 1:57 PM 1:58 PM
      AOB 1m
    • 1:58 PM 1:59 PM
      Any other Business 1m
      Speakers: Brian Davies (Lancaster University (GB)) , Darren Moore (Science and Technology Facilities Council STFC (GB))