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CCRC'08 planning conference call

→ Europe/Zurich
CERN

CERN
Description
Mailing list: wlcg-ccrc08@cern.ch

Web archive: here

To join the call, do one of the following:

  • Dial +41227676000 and enter access code 0121632, or
  • To have the system call you, click here
(Leader code is 0111659).
    • 17:00 → 17:10
      Conclusion on Scaling Factors for February challenge 10m
      Slides
    • 17:10 → 17:30
      Actions in preparation for December F2F meeting 20m
      • Feedback from sites regarding resources available for February challenge
      • Discussion of scope and scale of February challenge in the light of the above
      • Data volumes and rates - information required by sites to prepare
        See questions from Tier0, for example:

        • how much tape space is required for the test in February ?
        • how much of the space will be kept after the test (i.e. can we delete it all) ?
        • how much tape space is required for the test in April ?
        • how much of the space will be kept after the test ?

        Are there any indications of the data rate required

        • to tape (i.e. writing) ?
        • from tape (i.e. processing of data which has not cached at the disk layer) ?
        document
      • Preparation of walk-throughs of services required for each 15m
        Detail of experiment, WLCG services involved in each block of the challenge with appropriate "scaling factors":

        Possible scenario: blocks of functional tests, Try to reach 2008 scale for tests at…

        1. CERN: data recording, processing, CAF, data export
        2. Tier-1’s: data handling (import, mass-storage, export), processing, analysis
        3. Tier-2’s: Data Analysis, Monte Carlo, data import and export

        This is perhaps just combining the existing presentations on the plans, e.g. from the November MB F2F meeting, with the Critical Services that will be used in each step (and the appropriate "scaling factors")

      • Monitoring the Challenge
        Do we understand what tools are required / will be used to monitor the challenge?

        Are all of these tools in place with the necessary functionality?

    • 17:30 → 17:50
      SRM v2.2 preparation - timetable for experiments to use SRM v2.2 features 20m
      Details from LHCb:

      • to move our current tools to use SRM 2.2 in a mixed environment we estimate we need 2-4 weeks (including testing) to do that. This would not include any new functionality at this stage. This assumes the latest lcg utils (and the necessary gLite s/w) is deployed at the sites. Need to clarify on the use of srm-get-metadata within the centralised stager agent. On the WN we will need lcg-cp & lcg-gt.
      • to make full use of the new functionality with SRM 2.2 will not come until we release DIRAC3 which is expected at the end of December/beginning of January.
    • 17:50 → 18:00
      Date and time of next meetings (clashes with LHCC Comprehensive review and WLCG Service Reliability workshop) 10m
    • 18:00 → 18:20
      AOB 20m
      LHCb CCRC planning meeting
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