What is expected from ALICE during CCRC’08 in February

2 CCRC’08 in February Duration – 26 days, 04/02 Monday to 29/02 Friday inclusive Duration – 26 days, 04/02 Monday to 29/02 Friday inclusive Scope Scope Whatever the experiments’ computing model requires Whatever the experiments’ computing model requires Computing exercise, not necessarily detector data from the experimental setup with reconstruction etc… Computing exercise, not necessarily detector data from the experimental setup with reconstruction etc… Should exercise the infrastructure and services Should exercise the infrastructure and services Should show that the WLCG is ready/not ready for data taking Should show that the WLCG is ready/not ready for data taking

3 CCRC’08 in February (2) Everybody (including ALICE) is focusing on data management Everybody (including ALICE) is focusing on data management For the others, this is mostly SRM v.2, LCG-utils (icluding GFAL) and FTS For the others, this is mostly SRM v.2, LCG-utils (icluding GFAL) and FTS For ALICE this is FTD with FTS and xrootd- enabled storage For ALICE this is FTD with FTS and xrootd- enabled storage Status of site configuration for SRM v2.2 Status of site configuration for SRM v2.2 Has site upgraded to SRM v2.2 in production? (Y|N) Has site upgraded to SRM v2.2 in production? (Y|N) Has space management been turned on? (Y|N) Has space management been turned on? (Y|N) Are endpoints correctly published? (Y|N) Are endpoints correctly published? (Y|N) Are spaces correctly configured per token & VO? (Y|N) Are spaces correctly configured per token & VO? (Y|N)

4 Data paths and rates Raw Data CASTOR2 (CERN) Pass1 reconstruction at CERN Custodial Shuttle Conditions Data (OCDB) Tier 2: Simulation Analysis ALICE DAQ Data rate from DAQ max 1.5GB/s max 1.5GB/s read access from CASTOR2 (RAW), max 150 MB/s write access (ESDs) FTS: Max 60MB/s in total for replication of RAW data and pass 1 reconstructed ESDs Shuttle gathers data from DAQ, HTL and DCS. Publication of condition objects in Grid FC, storing in GRID SEs and replication to T1s (small volume) Pass2 reconstruction at T1 sites

5 What is expected from ALICE Steady stream of data out of CERN with rate 60MB/s (FTS) Steady stream of data out of CERN with rate 60MB/s (FTS) This will be partly RAW data, partly padding data to arrive at the above rate This will be partly RAW data, partly padding data to arrive at the above rate During the December exercise, the total RAW data written to CASTOR2 and replicated was 20TB (11 days) During the December exercise, the total RAW data written to CASTOR2 and replicated was 20TB (11 days) For February, we should expect some 60TB RAW For February, we should expect some 60TB RAW

6 What is expected from ALICE Total transfer volume is 130TB (over 25 days) Total transfer volume is 130TB (over 25 days) Rates and storage document here Rates and storage document herehere The ‘padding’ data should go to a recyclable tape pool – the sites are very protective of their tapes The ‘padding’ data should go to a recyclable tape pool – the sites are very protective of their tapes We will have 3 types of storage at all T1s We will have 3 types of storage at all T1s T1D0 T1D0 T0D1 T0D1 T1D0 recyclable T1D0 recyclable

CCRC 04/12/20077 Services and criticality ALICE Wiki: