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ALICE-LCG Task Force weekly
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Europe/Zurich
14/4-030 (CERN)
Description
Telephone conference. To join, please do one of the following:
1. Dial +41227676000 (Main) and enter access code 0145122, or
2. To have the system call you, use this link
https://audioconf.cern.ch/call/0145122
Stefano:
ALICE is allowed to use torrent to distribute software but at CNAF cannot use P2P to communicate between the CE and the WNs.
AliEn build status (Olga and Pablo presenting)
Slide 3: Latchezar: make sure the AliEn packages are not stripped down too much (ensure ROOT still compiles using the provided AliEn libraries)
Slide 6: local submission of jobs should start the application in a clean environment, to avoid user-set variables to interfere with the job
Slide 10: xgapi has to be made available to uses as soon as possible, either as an early access to 2-18 or as HEAD (to be discussed later)
CREAM-CE Setup: Proposal (Patricia)
Slide 6: Stefano: how to define a backup CREAM vobox ? Same as CERN (ClusterMonitor & CE on the backup as well / ML only on the primary VoBox)
Latchezar: sites should not drop the old VoBox but refactor it as the CREAM backup VoBox (FZK)
Patricia: let's really use both in parallel
Xrootd (Fabrizio)
Slide 4: Latchezar: this is actually the catalogue for CAF
Pablo: we also need to time how long the cleaning of these files takes
Slide 6: xrd3cp is in AliEn
Slide 7: questions are also welcome on the xrootd mailing list
Slide 9: Latchezar: we push for the new xrootd to be deployed, but the HowTo pages need checking/updating
Fabrizio: SunOS works fine for default installations, complex installations need manual intervention.
Latchezar: Lyon should also upgrade asap because then data taking starts and we cannot upgrade any more
glExec (Steffen)
Slide 5: Latchezar: We will not configure a site-provided service, ALICE will only use a fully-supported service.
Stefano: Where will the credential be kept -> still on myproxy.cern.ch
Pablo: The users would need to specify the DNs of who (pilots) can retrieve the certificate
Latchezar: This is already taken care of, the people who run the VoBox services are given the "pilot" voms extension
Patricia: When you login in the VoBox you are mapped as SGM, and there can only one role, so how will the extension change for the pilot?
Stefano: The second certificate (for pilots) will be copied after login from somewhere (scp?)
Patricia: While you can do this, the file won't be renewed by the renewal service so how to have a permanently valid pilot proxy on the VoBox? (To be discussed later)
Slide 6 : Costin: +1 con: how will we kill our own jobs?
AliEn in Oracle (Almudena)
Slide 10: Planning is probably too optimistic :)
Stored procedures will probably raise big problems.
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