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Ian Bird WLCG Management Board CERN, 19 th November 2013. Reports from meetings. LHCC (24-26 Sept). Referees’ meeting Main discussion – Computing model update draft Attended by referees, LHCC chair, RSG chair Followed by discussion in the LHCC closed session See minutes (attached) - PowerPoint PPT Presentation
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Reports from meetings
Ian Bird
WLCG Management Board
CERN, 19th November 2013
15 Nov 2013
LHCC (24-26 Sept)
Referees’ meeting Main discussion – Computing model update
draft Attended by referees, LHCC chair, RSG chair
Followed by discussion in the LHCC closed session See minutes (attached)
Followed by detailed comments and suggestions on the document draft
Goal to submit final version very soon – for approval at the December LHCC
15 Nov 2013
Comments from LHCC
The LHCC recommends that the hypothesis of flat future resources be removed from the assumptions; instead physics motivated needs should be stated.
The optimization work towards best physics output should continue with the same momentum as in the past year, in parallel and beyond the preparation for the data taking restart in 2015.
In particular, the committee encourage the continuation of the intensive collaboration amongst the experiments and with WLCG on topical issues, the exchange of methods and the sharing of software frameworks.
In parallel with the planning work for the upgrade phases I and II, the experiments should also clarify the timelines for defining consolidated models for computing.
15 Nov 2013
C-RRB (29th Oct)
C-RSG recommendations to RRB – see RSG report attached to RRB agenda Rebus to be updated to reflect this (ongoing)
The resource requirements for 2014-17 were shown to the RRB General agreement that working assumption of
flat budgets is a reasonable approach
15 Nov 2013
CRSG comments/ recommendations
Run 2 requests have become more definite since Spring – assumed flat budgets;
ALICE and LHCb scrutinised requests have not always been met at T1. RRB requested to help find a way to resolve this;
CRSG strongly supports on going efforts to improve software efficiency, notes that resulting gains are already assumed in the requests for Run 2;
Effectiveness of disk use only partly reflected in occupancy. Welcome efforts (popularity, etc.) but would like a metric to take account of access frequency;
Networks have been exploited to reduce disk use and move processing between tiers. Concern that poorly networked sites will be underused and cost implications of providing network capacity.
15 Nov 2013
Updated scrutiny schedule
Spring of year n Final scrutiny of requests for year n+1 and look beyond Review use of resources in previous calendar year, n-1
Autumn of year n Look forward to requests for year n+2 and beyond If necessary, consider year n+1 requests
o For individual experiments if they want significant changeso Or for all experiments if, say, LHC running parameters
change significantly
CRSG asks experiments to submit documentation on 1 February and 1 August
15 Nov 2013
Overview Board (15th Nov)
Updates on status of new Tier 1 sites KISTI approved as full Tier 1
Noted that 10 Gb connection is delayed, but now funding is secured and tendering under way
Had fulfilled all other tests Got confirmation from countries running services
needed by WLCG that this commitment remains independent of the EGI.eu funding evolution Always within the limitations of national WLCG funding!
Discussion on Computing model document – main points E-Infrastructure vision and relationship to WLCG
15 Nov 2013
