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Steering Meeting: Tapes (part 2)

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31/S-028 (CERN)

31/S-028

CERN

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Maria Arsuaga Rios (CERN)
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FTS 3.6 upgrade [Checklist]

  • Pruning transfers finished more than 4 days is acceptable
  • ATLAS, CMS and LHCb give green light for the update
  • Agreed for Tuesday 4th, 10.00 AM
  • Two hours downtime to be expected
  • ATLAS will drain and switch to the pilot
  • CMS will not account failures for the availability/reliability of sites during this period

Staging

  • FTS teams should add a view to easily identify files that are causing errors, so sites can debug
  • The monitoring view will include more information once production instances are upgrades
  • Not all T1 tapes are the same (different sites may have different limitations)
    • Does FTS needs to be able to be configured per storage?
  • David Mason will prepare a list of questions for T1 sites about tape params and what FTS could do
    • To be sent to fts3-steering@cern.ch
    • Giuseppe Lo Presti will help
  • Once production is upgraded, LHCb, ATLAS and CMS will try to see how GridKa tapes performs/handle fair shares

AOB

  • ATLAS asks for more frequent releases if possible
    • 3.5 was fully rolled out end of november, with Christmas in the middle it hasn't been that long
    • Bugfixes are normally rolled out quickier
    • FTS will consider faster iterations of releases with new features
  • ATLAS find hard to dig through errors, so they can better understand the reasons, and ask sites for explanations
    • FTS already tags errors as SOURCE, DESTINATION and TRANSFER
    • FTS 3.6 will also tag errors as STAGING
    • To facilitate categorization, and as gfal2 already tries doing this, FTS will publish the error codes as well (FTS-926)
  • CMS considering using FTS for staging as well
    • FTS teams should send to Natalia some documentation on this
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