LFCMeetOct15

Introduction

• Meeting of the sub-committee to address LFC migration in the US cloud.
• Coordinates:
  • Wednesday, Oct 15, 10am Central/5pm CERN
  • new phone (309) 946-5300, Access code: 735188; Dial *6 to mute/un-mute.
• Background: SubCommitteeLFC, FileCatalog
• Attending: John, Charles, Paul, Rob, Horst, Kathik
• Apologies: Patrick, Shawn

LFC launch schedule

• See ChecklistForLaunchOfLFC

Oct 1  - LFC subcommittee  meeting to discuss launch
            plan (changes needed in all services and tools
            to switch a site) and resolve any voms
            group/role issues, etc
Oct 7 - AGLT2 : main burn in and validation on a single site...
followed by the rest of the sites:
Oct 14  - UC, UTA
Oct 16 - IU, BU
Oct 20 -  BU, SLAC
Oct 21  - OU, BNL
Oct 23 - WISC

LFC launching at AGLT2

• last week
  • All DQ2 related issues seems to working.
  • Problem with getting pilots to run correctly. Is there a problem with worker node client?
  • Fails to import lfc - cannot open shared object file. Something not quite right with the environment.
  • What about the other pythons installed in $APP/atlas_app? Interference? Mixing 64 bit and 32 bit, possibly?
  • Xin will re-install the python in $APP/atlas_app, making sure its 32 bit.
• new status
  • Paul finding errors with transfers today. Communication error on send. Error reading data token header. Has seen these before. * Test reconstruction jobs finish - they make it into the transferring state; * Production jobs were failing because of a prob with LFC command directory creation. * Marco notes that a production job has finished.

LFC launch at UC

• Run LRC update once again.
• Pause pilot submission
• Switch over DQ2
• LFC host: uct2-grid5.uchicago.edu

LFC installation and LRC migration

• See InstallLFConOSG
• Any issues?
• John: what about the last modified time is getting lost in the migration script. Was not in the original conversion script. Also noticed a whitespace issue.
• What about keeping the voms proxy updated? See: http://twiki.mwt2.org/bin/view/Main/Dq2Proxies

LFC-based data management tools (Patrick, Charles)

• last week
  • File-based deletion working. Scripts from Vincent Garrone for dataset level deletion.
  • User dataset deletion. This will probably be a challenge? How is it handled in the LCG?
• updates
  • Integrity check needs to be modified for GPFS back ends.
  • Deletion tools require BDII - but we've not accepted this as accepted service in US ATLAS, so we'll need to program around it. Charles will be in contact with Stephane.

AOB

-- RobertGardner - 14 Oct 2008