Name: LCG Experiment Coordination Meeting
Start: 2007-04-16T14:30:00+02:00
End: 2007-04-16T16:25:00+02:00
Location: No location set

14:30 → 14:40

Status of WLCG Q1 Tx-Ty Transfer Milestones - aka Multi-VO tests 10m

Demonstrate Tier0-Tier1 data export at 65% of full nominal rates per site using experiment-driven transfers
Mixture of disk / tape endpoints as defined by experiment computing models, i.e. ~30% tape for ATLAS; transfers driven by experiments
Period of at least one week; daily VO-averages may vary (~normal)
Demonstrate Tier0-Tier1 data export at 50% of full nominal rates (as above) in conjunction with T1-T1 / T1-T2 transfers
Inter-Tier transfer targets taken from ATLAS DDM tests / CSA06 targets
Demonstrate Tier0-Tier1 data export at 35% of full nominal rates (as above) in conjunction with T1-T1 / T1-T2 transfers and Grid production at Tier1s
Each file transferred is read at least once by a Grid job
Some explicit targets for WMS at each Tier1 need to be derived from above

14:40 → 14:50

Reference boxes (DTEAM) for the File Transfer Service 10m

As discussed already during Service Challenge 3, there is a clear need for 'reference boxes' at least at the Tier1 sites on which to establish a baseline for the File Transfer Service.

The experience with the WLCG transfer milestones for Q1 2007 underlines the urgency of this requirement.

14:50 → 15:00

Status of Dress Rehearsal Preparations - Deployment of Required Services 10m

LFC/DPM 1.6.3 is now available. New in LFC: bulk methods for Atlas. New in DPM: production SRM 2.2 support.
FTS pilot service is installed with FTS 2.0 and has been tested with low-level dteam transfers - now starting to test its integration with experiment software frameworks. There was an update on this at March 20th Management Board
SRM 2.2 tests with FTS continue - starting higher throughput stress-tests to DPM instance at CERN and dCache instance at Fermilab.
DB services - see March 13th Management Board

15:00 → 15:20

Feedback from FTS 2.0 pilot service 20m

15:20 → 15:30

Up-coming service interventions 10m

Proposed date of April 25th for move of CMS C2 stager to new h/w.

Dear all, We have prepared a new Castor Stager database for CMS, using Oracle RAC and NAS servers on certified hardware. This setup replaces the diskserver that has been used until now (and that suffered from A hardware problem earlier this month), and is sized and configured to handle the anticipated load of the CMS Castor usage. We propose to migrate the stager database to this setup next Wednesday, Apr 25. The intervention will start at 09:00, and should be finished before noon. No new Castor requests will be handled during the time of the intervention. Please let us know if this time slot inconveniences you, and propose an alternative date. best regards, Jan van Eldik / Castor deployment team

(10' is the time that all systems in the Computer Centre are protected against power glitches).

Some longer interventions will still be needed, but these too should be minimised:

In number;
In duration;
In impact (i.e. possible service degradation rather than complete outtage).

Possible slots prior to start of Dress Rehearsals and Pilot LHC run:

Slot in June, e.g. June 11 (following weeks are CMS / ATLAS weeks respectively).
Week of CHEP 2007?? (1st week of September)

Foreseen interventions:

Move of CASTOR DBs to better h/w (to be done by VO - service interruption involved).
Deployment of new CASTOR LSF plug-in
CASTOR disk server h/w fixes (or rolling replacement of servers...) Remove from future agendas
Oracle Critical Patch updates
- 17 April 2007
- 17 July 2007
- ???16 October 2007???
- 15 January 2008

15:30 → 15:50

Main activities for Q2 2007 20m

15:50 → 15:55

AOB 5m

LCG Experiment Coordination Meeting

28-R-015