Slide David Britton, University of Glasgow IET, Oct 09 1 Prof. David Britton GridPP Project leader University of Glasgow GridPP26 Collaboration Meeting 29 th March 2011 Efficient & Effective

Slide Outline Where are we? A brief look back The theme of this meeting A brief look forward David Britton, University of Glasgow GridPP26 2

Slide Where are we? David Britton, University of Glasgow GridPP GridPP GridPP GridPP GridPP2+ From Web to GridFrom Prototype to Production From Production to Exploitation GridPP Computing in the LHC era During GridPP3, the CPU delivered by the UK grew a factor of 10. Seneca: "Every new beginning comes from some other beginning's end."

Slide Observations on GridPP3 David Britton, University of Glasgow GridPP26 4 Data Taking GridPP3

Slide Observations on GridPP3 David Britton, University of Glasgow GridPP26 5 During GridPP3, the UK was the largest EGEE contributor of CPU to the LHC VOs But, we have struggled to get CPU efficiency (CPU/Wall time) consistently above 85%. Many factors here. 85%

Slide David Britton, University of Glasgow GridPP26 6 Observations on GridPP3 … but I doubt the fates are out of ammo yet! We dodged a lot of bullets… SSC CSR R89 CASTOR OPN LHC Disk HW-£

Slide Efficient & Effective David Britton, University of Glasgow GridPP26 7 Getting some exercise whilst putting the baby to sleep and walking the dog: Efficient and effective! …. But clearly one needs to do choose effective things to do efficiently!

Slide Efficient & Effective David Britton, University of Glasgow GridPP26 8 Efficiency: Number of tickets assigned/day. Effectiveness: Fraction of tickets assigned to correct expert 100% Efficiency is more about speed or quantity. Effectiveness is more about quality. Help-desk operation

Slide Meetings? David Britton, University of Glasgow GridPP26 9 Since the beginning: 16 OC meetings 16 CB meetings 30 UB/EB meetings 420 PMB meetings 776 UK-ROC (inc dTeam)

Slide GridPP4 Structure David Britton, University of Glasgow GridPP26 10 Oversight Committee changes from bi-annual to a mid-term and full- term review. The CB stays the same: Group leaders from each institute. User Board becomes entirely virtual with a User Coordinator responsible for resource scheduling and community contact. The PMB stays largely the same. The dTeam becomes the ops-Team and is re-aligned with new Tier-2 structure and the development of a UK NGI.

Slide Tier-2 Structure David Britton, University of Glasgow GridPP26 11 Evolve from 4 x Tier-2 coordinators plus 4 x deputies (the latter did not broaden the site representation) to 8 people from the key sites (as identified by the experiments) plus EGI representatives. Goal is to better align ops-team with the experiments and with EGI/NGI. It also ensures engagement in the national operations of all sites in which significant manpower has been invested. Tier-2s may decide to keep much of their internal coordination as is.

Slide GridPP4 Funding David Britton, University of Glasgow GridPP26 12 GridPP4 award is now approved for the full four years (April 2011 to March 2015) with the exception of the Tier-2 hardware funding. We are clarifying with STFC that we buy a service from the Tier-2s, thus this funding should probably not (all) be classified as “capital”. This may help to secure approval. The first-tranche of GridPP4 grants came in about 2.5% higher than planned. We need to save this money on the second-tranche (reduction of 1-month? per post). To facilitate this, we will arrange for no-cost extensions of the first-tranche grants to provide a 6-month overlap. We probably don’t want to rush to issue the new grants just yet due to the new grants system.

Slide Elephant #1 David Britton, University of Glasgow GridPP26 13 GridPP4 Proposal: Disk+CPU: £2.8m at Tier-1; £2.7m at Tier-2 Current Estimates: Disk+CPU £3.5m at Tier-1 £3.3m at Tier-2

Slide Elephant #2 David Britton, University of Glasgow GridPP26 14 Manage with 2011 Shift from 2013 to 2012 Big increase for LHCb Shift towards Tier-2s

Slide Whither to? David Britton, University of Glasgow GridPP26 15 Towards simplicity.  Less demands on custodial disk storage:  storage-free Tier-2s?  commercial solutions (W1R0)?  virtual data?  More commonality:  ARC, gLite, Unicore: EMI?  Experiment proprietary solutions.  Virtualisation.  Taming the Ogres:  CASTOR (and beyond)  Data Bases  Tape Systems Exploiting the new:  More network-centric architectures?  New computational architectures?  Future storage concepts?  Economically viable commercial offerings?

Slide Summary David Britton, University of Glasgow GridPP26 16  In GridPP4, driven by the increasing demands from LHC data, we need to strive towards greater efficiency and effectiveness. This is the underlying theme of the meeting.  It is important because in the next few years we are likely to experience for the first time, real and sustained contention for resources. This will be against a backdrop of financial austerity, higher-than-planned hardware prices, and increased experiment resource requests.  We need to remain focused on the, sometimes changing, needs of the experiments. It will take agility, good-humour, cooperation, innovation, anticipation, hard-work, some deep-breaths, (and so on)...  This meeting marks the end (of GridPP3) and the beginning (of GridPP4). It is an opportunity to share in our past successes and refine our vision of the future.