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CCJ Usage for Belle

CCJ Usage for Belle. K. Hasuko (RIKEN) CCJ User’s Meeting September 26, 2003. Monte Carlo production and analysis CPU time: 170K hours (Aug.1, 02 ~ Aug.22, 03) MC production 145K hours Analysis 25K hours

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CCJ Usage for Belle

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  1. CCJ Usage for Belle K. Hasuko (RIKEN) CCJ User’s Meeting September 26, 2003 • Monte Carlo production and analysis • CPU time: 170K hours (Aug.1, 02 ~ Aug.22, 03) MC production 145K hours Analysis 25K hours • 1TB HD for work space to keep generated MC (mDST) files to keep histogram files for analysis • 1 Linux box for DB server K Hasuko @CCJ User's Meeting

  2. Monte Carlo Production • RIKEN duty: 10 fb-1 equivalent (=120M events) / year • Job procedure • Copy input files (generator) from KEK to CCJ • Submit jobs • Check output files (mDST) • Send mDST files to KEK • Typical MC job • I/O file size: in 10MB, out 200MB • CPU usage: 3.5sec/event  6k events = 5.8 hours • Max memory 360MB; max swap 1GB • Sending output files: scp, 0.7MB/sec  285sec • belle_sim queue • 30-50 CPUs • ~ 200 jobs/day (1M events/day)  40GB output/day • Submission schedule • Depends on experiment schedule • Oct 03 – Apr 04 K Hasuko @CCJ User's Meeting

  3. Analysis • Job procedure • make analysis (skimmed) histograms at KEK farm • Copy the histogram files to CCJ • Merge files; detailed analysis at CCJ • Keep out put files at 1TB HDD • Schedule • Constant; basically small size of jobs • Produce specific (toy) MC at CCJ • Copy data at KEK to CCJ HPSS (3.5T for data; 10T for MC) • Full data and MC analysis (150fb-1 30K hours) K Hasuko @CCJ User's Meeting

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