Difference between revisions of "Atlas:Analysis Challenge ST"
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=== Results and Monitoring === | === Results and Monitoring === | ||
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=== More information === | === More information === |
Version du 15:43, 20 janvier 2009
Site Stress Test
Sommaire
Procedure
- Replication of target datasets accross the cloud
- Preparation of job
- Generation n jobs per site (Each job processes 1 dataset)
- Bulk submission to WMS (1 per site)
Test conditions
- The testing framework is ganga-based. It is currently using LCG backend but it will soon be possible to use PANDA backend as well. Metrics are collected and displayed at http://gangarobot.cern.ch/st/
- Both POSIX I/O and "copy mode" may be used allowing performances comparaison of the 2 modes.
- It uses regular AOD analysis in 14.2.20 with mc08*AOD*e*s*r5 DQ2 inputs
- Input datasets are read from ATLASMCDISK and outputs are stored on ATLASUSERDISK (no special requirements there). Input data access is the main issue. No problem on data output
- Required CPUtime : GlueCEPolicyMaxCPUTime >= 1440 (1 day , typical duration : 5 hours)
- Jobs run under DN : /O=GermanGrid/OU=LMU/CN=Johannes_Elmsheuser
- LAN saturation observed in case of 1 Gb network connection between WN and SE.
- It is possible for sites to limit the number of jobs sent at a time.
- Test duration : 48 hours
Target and metrics
- Nb of jobs : Few hundred up to 1000 jobs/site
- Rate (evt/s) : up to 15 Hz
- Success rate (success/failure rate) > 80 %
- CPU utilization : CPUtime / Walltime > 50 %