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Tier-2 Planning

Tier-2 Planning. History GridPP2 Planning Current Questions Future Planning. History. Lots of Hardware provided to Institutes through (S)HEFCE/JIF/JREI/SRIF... Little or no manpower support (System Managers already overloaded) GridPP1 Proposal had NO Tier-2 hardware or manpower request

debra-brady
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Tier-2 Planning

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  1. Tier-2 Planning • History • GridPP2 Planning • Current Questions • Future Planning GridPP8 Tier-2 Planning

  2. History • Lots of Hardware provided to Institutes through (S)HEFCE/JIF/JREI/SRIF... • Little or no manpower support (System Managers already overloaded) • GridPP1 Proposal had NO Tier-2 hardware or manpower request • Towards end of 2002 agreed with PPARC Oversight Committee that we could half fund 4 Tier-2 support staff for the last year of GridPP1 • Currently being recruited GridPP8 Tier-2 Planning

  3. GridPP2 Planning • Support of Tier-2 given much higher priority in GridPP2 Proposal • Group institutes into 4 'regional Tier-2's' • London – Brunel, Imperial College, QMUL, RHUL and UCL • NorthGrid – CLRC Daresbury, Lancaster, Liverpool, Manchester, Sheffield • ScotGrid – Durham, Edinburgh, Glasgow • SouthGrid – Birmingham, Bristol, Cambridge, Oxford, RAL PPD GridPP8 Tier-2 Planning

  4. UK Tier-2s Tier-2 Regional Centres: ScotGrid NorthGrid SouthGrid London Grid GridPP8 Tier-2 Planning

  5. Existing Hardware • PP Share is ~ 75% of CPU, 88% of disk • Average KSI2000/CPU ~ 0.42 (~ 1GHz PIII) Existing hardware (1 April 2003) GridPP8 Tier-2 Planning

  6. Existing Hardware Some was earmarked for specific experiments and some for all experiments at that institute GridPP8 Tier-2 Planning

  7. Future Hardware Estimated hardware (September 2004) Estimated hardware (September 2007) How much for PP and how much for LCG, EGEE etc? (later) GridPP8 Tier-2 Planning

  8. Hardware Request • In the GridPP2 Proposal assumed that existing/future institute hardware will be sufficient (estimated to be worth £7.9M – not £3.0M as in proposal) • We requested £200k for 'interface hardware' between Tier-2s and Tier-1 GridPP8 Tier-2 Planning

  9. Manpower The main GridPP bid was for manpower to operate the Tier-2s We said that 4 of these were existing posts and requested 16 new posts (of which 4 are presumably continuation of the current 4 half posts) Note: Experiment support was supposed to be in experiment's own bids GridPP8 Tier-2 Planning

  10. Manpower The envisaged Specialist Support roles were (with current expertise): • Security Officer (Operational) 1 FTE (NorthGrid/SouthGrid) • Resource Broking 1 FTE (London) • Networking 1 FTE (London/NorthGrid) • Grid Data Management 2 FTE (ScotGrid) • VO Management & Services 1 FTE GridPP8 Tier-2 Planning

  11. Reduction Scenarios For the GSC presentation I prepared two reduction scenarios: GridPP8 Tier-2 Planning

  12. Resources for LCG • We have estimates of the total hardware from now to 2007 • Are these realistic? Have to assume so. • How much will PP get? (as function of time) • How much will be 'on the Grid’ • LCG • EGEE • What Tier-2 resources will be available for LCG-1? • SLL - 30% of total in 2004 to 60% in 2007 • Gives 3152 CPU + 338 TB in 2005 (Optimistic?) • JCG – 25-50% of a couple of sites per Tier-2 • Gives 1131 CPU + 100 TB in 2005 (Pessimistic?) • Do we assume that the resource contribution to LCG (PP) is the same as to EGEE (+other disciplines)? GridPP8 Tier-2 Planning

  13. Future Planning • Once we get a firm GridPP budget • Agree a reduction scenario (presumably) • Define in detail the manpower roles • Define allocation procedure (~ hardware in place on 1 June 2004?) • Need to agree (procedure for) hardware numbers for LCG/EGEE and other enquiries i.e. LCG(t) is ε(t) x Total (t) • what is ε(t)? • How do we interoperate with e-Science Level-2 Grid? • Need dialogue between Tier-2 'managers’ (and Tier-1) GridPP8 Tier-2 Planning

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