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XCache DevOps Meeting Apr 09, 2020

US/Central
Brian Bockelman, Derek Weitzel (University of Nebraska - Lincoln) , Marian Zvada (US CMS)
Description

Time: 11AM PT/1PM CT/2PM ET
Where: ZOOM.US

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Attendees: Andy, Matevz, Ilija, Derek, JohnH, Edgar, DiegoD, Marian, BrianL, Mat

News
----
- COVID-19 presence everywhere and office work nowhere is no news anymore
- Briank&Frank are fine with "Idea on discussions how jobs use caches", could be two-folding meeting, best to organize after other meetings settle this month, opening doodle or ask for the week after April 21 and see if Frank/Brian has time then. April 21 Ilija presents at DOMA/ACCESS meeting ATLAS update on VP tests ... Btw, here is last presentation from April 7th on "INFN caching activity update: reading NanoAODs through the cache":
https://indico.cern.ch/event/901157/contributions/3794940/attachments/2016896/3371197/DOMA-workflow-update.pdf

XRootD development for XCache
-----------------------------
- no news other than v5 RC2 testing in progress on various places
- lcmaps plugin (and other plugins like rucio), linking not necessarily needed inside packaging, will change in next builds for >=v5
- doc page for release 5 for proxy reference (structure looks good as is)
https://xrootd.slac.stanford.edu/doc/dev50/pss_config.htm

Issues
------
- v5 critical bug that Diego reported: https://github.com/xrootd/xrootd/issues/1175
- lot of chatter how the token is reused for sub-sequent user request in caches

ATLAS XCache deployment
-----------------------
- pretty stable
- how many jobs are accessing of caches analysis in the plans, no per se limits set to control number of users atm

CMS XCache deployment
---------------------
- no news, short summary on the monitoring effort for caches and servers in respect to the the collector development for detailed monitoring, there is more to say soonish on this meeting or elsewhere (to be decided?) by coordinators of the effort (Derek/Diedo/Edgar)

OSG StashCache deployment
-------------------------
- no news from software people, testing v5 RC2
- added Wisc server/origin to check_mk
- data integrity tool, PR in place and lot of comments in, will need discussion with reviewers
- SOFTWARE-3516: stash_server_list script in the oasis package release v2.2.10 promoted to devops repo; automate configuration of stashcp servers
- Amsterdam node in a dock, Houston node dead opened ticket, topology request for Sunnyvale coming up

AOB
---
- Ilija's last-minute mumble about something I didn't keep focus as the meeting was officially over, sorry! ;)

There are minutes attached to this event. Show them.
    • 1:00 PM 1:05 PM
      News
      Conveners: Brian Bockelman, Dr Derek Weitzel (University of Nebraska - Lincoln) , Mr Marian Zvada (US CMS)
    • 1:05 PM 1:15 PM
      XRootD development for XCache

      General status of development, XRootD releases with new cache features, bug fixes, etc...

      Conveners: Mr Andrew Hanushevsky (SLAC National Accelerator Laboratory) , Matevz Tadel (UCSD) , Wei Yang (SLAC)
    • 1:15 PM 1:25 PM
      ATLAS XCache deployment
      Conveners: Dr Ilija Vukotic (LAL) , Wei Yang (SLAC)
    • 1:25 PM 1:35 PM
      CMS XCache deployment
      Conveners: Diego Ciangottini (Universita e INFN, Perugia (IT)) , Prof. Frank Wuerthwein (UCSD)
    • 1:35 PM 1:45 PM
      OSG StashCache deployment

      Status of OSG deployment, origin/caches operations, stashcp, usage, etc...

      Conveners: Brian Bockelman, Brian Lin (University of Wisconsin-Madison) , Dr Derek Weitzel (University of Nebraska - Lincoln) , Mr Edgar Fajardo Hernandez (UCSD) , John Hicks (Internet2) , Mr John Thiltges (University of Nebraska - Lincoln) , Mr Marian Zvada (US CMS) , Mr Matyas Selmeci (University of Wisconsin-Madison)
    • 1:45 PM 2:00 PM
      AOB