ATLAS UK Cloud Support

Thursday 13 Jan 2022, 10:00 → 11:00 Europe/London

Zoom

Tim Adye (Science and Technology Facilities Council STFC (GB)), James William Walder (Science and Technology Facilities Council STFC (GB))

https://cern.zoom.us/j/98434450232

Password protected (same as (new) OPs Mtg)

● Outstanding tickets

• Outstanding tickets

  • 155473 TEAM atlas RAL-LCG2 less urgent NGI_UK in progress 2022-01-11 09:20:00 BU_ATLAS_Tier2 transfer and deletion errors EGI

    • IPV4 connectivity issues on new webdav aliased hosts

  • 155460 USER atlas UKI-SOUTHGRID-CAM-HEP less urgent NGI_UK in progress 2022-01-12 15:51:00 Failovers from Cambridge to CERN backup proxy EGI

    • Active discussions from site admins

  • 155430 TEAM atlas UKI-SCOTGRID-ECDF less urgent NGI_UK in progress 2022-01-12 16:37:00 UKI-SCOTGRID-ECDF transfer and deletion errors EGI

    • Data at risk, due to problems over Chrsitmas

  • 155141 TEAM atlas UKI-LT2-Brunel less urgent NGI_UK in progress 2021-12-24 08:39:00 Transfers from UKI-LT2-Brunel fail with “Internal Server Error” EGI

    • JW to progress to a solution

  • 154806 TEAM atlas UKI-LT2-QMUL less urgent NGI_UK in progress 2021-12-25 04:28:00 UKI-LT2-QMUL SOURCE transfer failures: [13] Result (Neon): SSL handshake failed EGI

    • Server fell over on Christmas day
    • Moving to adding more ‘oomph’, it’s not the highest priority item however

  • 154543 TEAM atlas UKI-SCOTGRID-ECDF urgent NGI_UK in progress 2021-12-08 12:35:00 DPM storage ACL configuration EGI

    • other urgent issues are delaying this

  • 154436 TEAM atlas RAL-LCG2 very urgent NGI_UK on hold 2021-12-08 13:25:00 RAL Echo Davs developments EGI

    • New webdavs endpoint with new gateways created. Available for more aggressive optimisation tuning and improvements

  • 153367 TEAM atlas RAL-LCG2 urgent NGI_UK on hold 2021-12-01 15:37:00 HTTPS on RAL CTA EGI

    • Needs to be tested

---

● CPU

• • RAL

    • Remains low; some from job scheduling when there’s a large number of transfering FTS files in the queue.
    • Also due to contention from other VOs

  • Northgrid

    • Largely ok

  • London

    • Some brief issues with QMUL

  • SouthGrid

    • BHAM a few days outage (?), but back now.
    • Sussex; running well, but could be running more slots at the site

  • Scotgrid

    • Durham - cooling; power issue over Christmas. SRR not readable; leading to overfilling of the storage.
      • Once SRR accessible, jobs started running and data reduced to below the total.
    • Gla; disk controller appears to have died; Expected to be onlined shortly.

•  

 

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● Ongoing Items

• TPC with http

  • Davs optimsisation at RAL to take priority with a new webdav alias available

• Storageless Site test (Oxford)

  • Seeing TLS errors on the Xcache via xrootd; cache is passing through the data

• LANCS Storage migration

  • JW to ensure endpoint is configured in CRIC
  • Site awainting one last swtich change to begin real testing

 

 

---

● News round-table

• Alessandra

  • NTR

• Dan

  • Storage for Atlas by end of months
  • Refurbishment remains some way off

• Gerard

  • NTR

• Matt

  • NTR

• Patrick

  • NTR; Attempting to work out how to get the full number of slots to run at the site.

• Peter

  • NTR

• Sam

  • GLA now restarted.

• Stephen

  • NTR

• Vip

  • To arrange a discussion to track down Xcache problems

 

 

10:00 → 10:20 Status

10:20 → 10:40 Ongoing Items

• TPC with http

  • Davs optimsisation at RAL to take priority with a new webdav alias available

• Storageless Site test (Oxford)

  • Seeing TLS errors on the Xcache via xrootd; cache is passing through the data

• LANCS Storage migration

  • JW to ensure endpoint is configured in CRIC
  • Site awainting one last swtich change to begin real testing

 

 

10:40 → 10:50 News round-table

• Alessandra

  • NTR

• Dan

  • Storage for Atlas by end of months
  • Refurbishment remains some way off

• Gerard

  • NTR

• Matt

  • NTR

• Patrick

  • NTR; Attempting to work out how to get the full number of slots to run at the site.

• Peter

  • NTR

• Sam

  • GLA now restarted.

• Stephen

  • NTR

• Vip

  • To arrange a discussion to track down Xcache problems

 

 

10:50 → 11:00 AOB

ATLAS Monitoring (UK Cloud)