1Oxford eSc – 1 st July03 GridPP2: Application Requirement & Developments Nick Brook University of Bristol ALICE Hardware Projections Applications Programme

2Oxford eSc – 1 st July03 Hardware LHC experimental numbers based on ongoing re- assessment exercise –Computing Technical Design Reports due in 2005 –Expts will be using LCG system Hardware and chosen middleware Software tools – e.g. POOL for persistency –Numbers include Tier-2 needs Non LHC experiments also gave estimated forward look –Based on MC production & analysis Expts are expecting a single, integrated Tier-1 centre

3Oxford eSc – 1 st July03 Hardware Expts are expecting a single, integrated Tier-1 centre Short term LHC expts expect some form of centralised planning via LCG project –Projection Execution Board Grid Deployment Board –GridPP participation in LCG bodies GridPP will continue with annual h/w review –CPU vs Disk

4Oxford eSc – 1 st July03 Ongoing Activities Example: LHCb Data Challenge – >40M events – 170 yrs on a 1GHz PC ~1/3 events produced in the UK

5Oxford eSc – 1 st July03 Ongoing Activities Current usage of Tier-1/A centre dominated by BaBar usage – 60% of CPU, 90% of disk

6Oxford eSc – 1 st July03 Networking Bandwidth dominated by replication in analysis stage of data processing –Use of tools, such as OptorSim, to understand networking –LHC expts need to understand computing & analysis models –Early estimates factor of 5 increase Current problems with MC production & bulk transfer –Unrelated to SuperJANET –Often attributable to links into the MAN

7Oxford eSc – 1 st July03 CPU estimates CPU resource reqts are equivalent to 14k 2.4GHZ dual processors running continuously LHC expts: ~65% need in 2004 >80% in 2007

8Oxford eSc – 1 st July03 Disk Requirements 60% of disk reqts in 2004 for LHC expts 70% of disk storage in 2007 for LHC expts –Non-LHC expts still data taking – need disk for finishing analyses

9Oxford eSc – 1 st July03 Tape Requirments Tape usage completely dominated by LHC usage – 90% Large level uncertainty –2007: ATLAS ( 850TB) vs CMS (1150TB)

10Oxford eSc – 1 st July03 Needs in 2004 End 2003GridPP New CPUs500 kSI2k667 £k500 Total kSI2k New disks624 TB146 £k437 Total TB New tapes510 TB100 New drivers2 New servers2 £k96 Total TB ADS maintenance50 Replacements20

11Oxford eSc – 1 st July03 Application Development Building on current collaborative activity –GANGA: ATLAS & LHCb –SAM: CDF & D Ø –BaBar: adoption of EDG s/w Prototyping Production environment –Monte Carlo production activity Analysis environment Grid technologies becoming more widely accepted across HEP commuity –old experiments – UKDMC, ZEUS, … –new activities – LCFI, MICE, …

12Oxford eSc – 1 st July03 Application Development Similar pattern of needs emerge from all experiments (not too suprisingly!) –Storage & location of data Replication issues –Monte Carlo production tools Seen as an obvious area for efficiency savings –Analysis interfaces Intelligent bookkeeping of a users analysis activities –Persistency solutions Composite objects spread across several storage systems

13Oxford eSc – 1 st July03 New Experiments ExperimentProposed Activity UKDMCMC Production Analysis ZEUSMC Production phenoGridMetadata MICEMC production Data handling ANTARESData handling CALICEData handling LC –ABDMetadata

14Oxford eSc – 1 st July03 LHC experiments ExperimentActivity ATLAS MC production Metadata LCG integratiom Pesistency & data management CMS MC production Persistency & data management Workload management Monitoring LHCb MC production Metadata LCG integration Persistency & data management GANGA (ATLAS & LHCb) Grid user interface LCG integration Monitoring

15Oxford eSc – 1 st July03 Non LHC expts ExperimentActivity BaBarJob submission Data handling Persistency MC production CDFMC production SAM deployment DØDØ MC production SAM deployment UKQCDData handling Metadata

16Oxford eSc – 1 st July03 Application Call Essential continue to develop application interface through GridPP2 –Expand activity to allow current none GridPP supported expts to participate –Benefit from LCG developments Call for application posts – January04 –Response by April –Reviewed à la GridPP (Williams committee) Expt activity in UK Science o/p Track record in Grid activity