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    LCG Experiment Coordination Meeting

    → Europe/Zurich
    28-R-015

    28-R-015
    Description
    Coordination meeting between LCG service and LHC experiments.

    Subscribe to lcg-experiment-coordination@cern.ch to be kept informed...

    To join the call, do one of the following:
    a. Dial +41227676000 (Main) and enter access code 0166222, or
    b. To have the system call you, click here: https://audioconf.cern.ch/call/0166222

    (Leader code is 0166111)

      • 14:30 → 14:40
        Summary of Experiment Activities (as input to Operations meeting) 10m
        document
      • 14:40 → 14:50
        Experiment resource requirements (and work plans) at all Tier-1 sites (cpu, disk, tape, network in and out, type of work) covering at least 2007Q1 and 2007Q2. 10m
        • Input now received from all experiments.
      • 14:50 → 15:00
        File Transfer Tests & multi-VO support 10m
        First discussions are as follows:

        • Try to understand end-to-end multi-VO issues using sites that support multiple VOs and high data rate.
        • Run a 'daylight hours' test, with close monitoring of the activity (hands-off overnight / weekend tests can continue, but the main focus is on the time when active monitoring is in place).
        • Use of a reference system at both ends (to help eliminate possible factors in determining of bottlenecks) to be discussed.
        • Requires realistic load generator per VO (start ATLAS, CMS and then add ALICE)
        • Propose to start with sites running dCache 1.7
        • Time schedule is tight - aim for late November / early December for feedback to January workshop
        • Pressure on SRM v2.2 testing and other FTS work is a further limiting factor
        • Need to re-run exercise later with also CASTOR2 sites (not currently expecting RAL or CNAF to be ready to support multiple VOs at ~100MB/s per VO by this time).

        • Revised megatable now gives CERN->BNL rates as 355MB/s!.
        • This will clearly require dedicated testing, particularly for recovery scenarios.
      • 15:00 → 15:10
        WLCG Service Report 10m

        Weekly FTS report, site-by-site action list.

      • 15:10 → 15:15
        AOB 5m