25th October 2006Tim Adye1 RAL Tier A Tim Adye Rutherford Appleton Laboratory BaBar UK Physics Meeting Queen Mary, University of London 25 th October 2006.

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Presentation transcript:

25th October 2006Tim Adye1 RAL Tier A Tim Adye Rutherford Appleton Laboratory BaBar UK Physics Meeting Queen Mary, University of London 25 th October 2006

Tim Adye2 Outline CPU Usage CPU Allocations Disk Status The bleak future Summary

25th October 2006Tim Adye3 BaBar Batch CPU Use at RAL

25th October 2006Tim Adye4 BaBar Batch Users at RAL (running at least one non-trivial job each week)

25th October 2006Tim Adye5 CPU Allocations CPU Allocation (MAUI fairshare target) CPU Usage (MAUI fairshare usage)

BaBar CPU Allocation and Usage Farm Capacity

25th October 2006Tim Adye7 Requests and Allocations BaBar Jan06 Request (MoU) BaBar Mar06 Request (after Tau/QED -> SLAC) GridPP Allocation End ofDisk (TB) CPU (kSI2k) Disk (TB) CPU (kSI2k) Tape (TB) Tape bandwidth (MB/s) Disk (TB) CPU (kSI2k) 05 Q Q Q Q Q

25th October 2006Tim Adye8 Data and Storage Keeping up-to-date with new production Uses disk space freed up by:- Tau/QED skims removed in February Converted R18b pointer skims to R18c deep-copy Removed AllEvents in August All old files still accessible from tape Except old SP5/SP6 generics, now deleted from tape Currently problems with user data disk /stage/babar-user1 offline since 13 Oct Recovering the data going slowly – hope to be done by the end of the week Three 1.9 TB AWG disks /stage/babar-awg1/Quasi2body (was TauQED) /stage/babar-awg2/Quasi2body /stage/babar-awg3/ThreeBody

25th October 2006Tim Adye9 Three bullets we try to dodge 1.BaBar disk, tape, and CPU requirements increase with luminosity. No change in GridPP allocations Jan06 to Dec08. 2.PPGP cuts removed BaBar/RAL support staff 1.5 FTE -> 0.25 FTE in April 2007 No effort to import data, releases, help users, etc identified 21 BaBar-specific tasks needed to keep Tier A running 3.GridPP proposal to remove non-Grid access by September 2007 No RAL front-ends, no NFS access to user/AWG disks Continued BaBar user analysis probably impossible SP and/or skimming might still be possible via the Grid

25th October 2006Tim Adye10 Summary We are making good use of the resources we have Apart from an (understandable) lull over the summer The service works well most of the time Current disk problem is severe, but rare We are fighting hard for 1.the resources we need 2.the staff we need 3.the non-Grid access we need