r2 - 05 Nov 2008 - 12:02:53 - RobertGardnerYou are here: TWiki >  Admins Web > LFCMeetNov5



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

LFC launch schedule

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


  • last week
    • All ready to switch to LFC.
    • Proddisk still not quite finished. Paul has made progress this morning - hopefully fixed for good. Otherwise ready go.
  • Issue is with the Harvard site: worker nodes are behind a firewall. So LFC communication is blocked, port 5010 is all. Looking for solutions. Considering putting the LFC on a border machine at Harvard.
    • One question is how was LRC working?
    • LFC proxy is another possibility.
    • There may also be lcg-cp communication - port 8443 for Bestman. Multiple high-range ports for gridftp transfers.
    • Tiny proxy works for scp.
    • Site mover changes? Would have to do reliable copy, and use the space token properly.


  • last week*
    • Converting the LRC to LFC.
    • Had shut down last week to start this - but other events at UTA intervened.
    • Q: want new files to be owned by atlas/role=production. Need to get into the VOMS. Send email to John Hover and Alessandro.
  • Production running again at SWT2_CPB. Nominally okay.
  • Issue with OU - group ownerships in the catalog itself.
  • Directory in LFC is /grid/atlas/users/pathena/, created by Paul during execution, his DN owns the dir, group would be atlas/role=production. Some users have usatlas role. Was the correct proxy used? And how did the LFC allow this?
  • Note that LFC handles multiple identities, so it can use both roles.


  • last week
    • Ready to go now. Question about whether space tokens are required first. Not strictly necessary. Need to do Bestman migration.
  • We heard from Patrick.
  • Work in progress - Paul is testing, and there are some problems. Permissions issues - sorting out.


  • Not here

LFC-based data management tools (Patrick, Charles)

  • last week
    • Integrity check needs to be modified for GPFS back ends (Posix).
    • 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.
    • Already working for dCache.
    • Should re-work to default as Posix. Charles will merge changes, John will test.

Dataset deletion discussion

  • New service required -
  • Use of USERDISK - what privileges.

Pilot progress (Paul )

Space reporting

  • last week * Sites are responsible for gathering the information on a schedule using cron. Then use a curl command that updates the Panda database. Charles will email the specifics.

URL's in the Catalog

  • last week
    • Marco: pilot is python api's, and is using long url. DQ2 is using short url, FTS too. So we have a mixed situation. lfc.py in DQ2 is truncating the information. Send request change to dq2 developers.
  • Savannah ticket opened. Request for patch to current version.


  • none.

-- RobertGardner - 04 Nov 2008

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