LHCb GRID Meeting 11/12 Sept 2000

Sept LHCb-GRID T. Bowcock 2 AGENDA 9:30 LHCb MC Production –Points SICB Processing Req. Data Storage Data Transfer Quality Checking Bookeeping ?? –Discussion –Points of Action 11:00Tea 12:00Departure for

Sept LHCb-GRID T. Bowcock 3 Action Items Responsibilities SICb – Eric, Martin (L), David S. (RAL) Production –Bbar inclusive 500k events in DST2 fomat without trigger requirements (RAL) –2M events in mini DST2 format (600kB/evt) after L0/L1 cuts (Liverpool) Need to generate about 20M events at 210 secs Reconstruct 2M at 130 secs /event DST2 : min bias 2M at 100 secs/evt Min bias reconstruction 2M at 50 secs /evt Pileup 2M at 50 secs/evt Total : 20M at 250 secs / event (6 mths on MAP) Target 500 events/file : merge files if necessary Total data sample (2M evts) is 1.2 TB

Sept LHCb-GRID T. Bowcock 4 Action Items Data storage/Transfer –Data rate generated 60kB/sec –Network bandwidth Liverpool – CERN 500 kB/s overnight (50% duty cycle) –Bandwidth Liverpool – RAL to be measured –Data at MAP (disk), copy to RAL, copy RAL to CERN where central bookkeeping is updated –Data sample corresponds to 50 x 20 GB tapes (5kSFr) –Try direct transfer from Liverpool to CERN –Eric (CERN), Martin (liverpool), Dave S (RAL)

Sept LHCb-GRID T. Bowcock 5 Data Quality Checking SICbCHK now exists (summer student) Histos available viewable from web AJ data quality manager responsible No formal responsibility for data quality checking at Liverpool RNDM numbers : seeds? Chris to Eric with DELPHI scheme.

Sept LHCb-GRID T. Bowcock 6 Bookkeeping For production – use same mechanism for generating scripts for submitting batch jobs. –Event type, size of dataset etc Send back log files (at least in short term), incl. new log file with bookkeeping information Update database at CERN on receipt of the data Database has entry with name of dataset at place where it was generated Joint development needed (Eric and new postdoc at Liverpool)