User Analysis Requirements
Assume that physicist performs a production analysis and requires a response time of 4 hours
The ~107 events tagged by first pass analysis are scanned and candidates selected (0.25 SI95 /event)
The selected candidates are subjected to analysis algorithm (20 SI95 / event)
Total installed cpu power needed calculated assuming:
- ~140 physicists actively doing analysis
- each submits 1 job / day ( NB. many short jobs as well)
- analysis distributed over a number of regional centres (~5) and assume ~20 physicists at each Regional Centre, ~40 at CERN
- Assume 0.3 x 107 events selected for algorithm on average
- 10,000 SI95 at each Regional Centre, 20,000 SI95 at CERN