RAL Tier1 Resources Review 20110601
Contents
- 1 Agenda
- 1.1 Overview of purpose of meeting, review agenda and meeting mechanics (Glenn Patrick)
- 1.2 Tier-1 deployed capacity and near term projections (Andrew Lahiff)
- 1.3 Experiment resource usage (Andrew Lahiff)
- 1.4 Experiment requests and proposed allocations (Glenn Patrick)
- 1.5 Summary of MoU commitments
- 1.6 Financial situation and longer term capacity planning (Dave Britton)
- 2 Attendees
- 3 Notes
- 4 Additional documents
Agenda
Overview of purpose of meeting, review agenda and meeting mechanics (Glenn Patrick)
Tier-1 deployed capacity and near term projections (Andrew Lahiff)
Experiment resource usage (Andrew Lahiff)
Experiment requests and proposed allocations (Glenn Patrick)
Summary of MoU commitments
Financial situation and longer term capacity planning (Dave Britton)
Attendees
Alastair Dewhurst, Dave Colling, Dave Britton, Brian Davies, Raja Nandakumar, Martin Bly, Andrew Lahiff, Glenn Patrick
Notes
Tier-1 deployed capacity and near term projections
There have been no problems meeting the 2011 WLCG CPU and disk pledges due to 2010 procurements becoming allocatable at the end of March / beginning of April. SL08 diskservers are expected to be ready for redeployment in July. Low tape usage by the VOs means that there will be no problems meeting tape commitments. T10KC tapes will go into production later this year, with September/October being a conservative estimate.
Experiment resource usage
CPU usage has been increasing over the past 2 months. CPU usage by the non-LHC VOs was high in May, mainly due to Pheno. There was a large increase in disk usage in April, but very little change in May. Tape usage has been increasing over the past few months, but usage is well short of even the 2010 WLCG pledge. LHCb tape usage increased during the past 2 months, which is due to a change in the LHCb computing model.
Experiment requests and proposed allocations
No experiments contacted Glenn after he asked for feedback about allocations for the next quarter. The MINOS CPU allocation has been decreased from 900 to 100 due to their low usage. No disk or tape changes in the coming months. There will be no problems meeting allocations over the next quarter. Andrew S will develop a proposal for use of the spare disk capacity.
The current CPU capacity will almost meet the proposed 2012 WLCG pledge.
Martin reminded everyone that the total number of diskservers is decreasing due to the the small capacity older diskservers being decommissioned and the newer diskservers having higher capacities, which may affect performance.
Summary of MoU commitments
No issues with CPU or disk in recent months. MoU commitments have been met.
Financial situation and longer term capacity planning
There are no financial problems with the Tier-1 this year. Enough money is available to buy all the required hardware.
