P. Vande Vyvre – CERN/PH for the ALICE collaboration CHEP – October 2010

Detectors participation to Physics runs CHEP – Oct 2010P. Vande Vyvre – CERN/PH2

Data taking with the whole ALICE CHEP – Oct 2010P. Vande Vyvre – CERN/PH3

Data Taking Status CHEP – Oct 2010P. Vande Vyvre – CERN/PH4 Total events collected: ~ 950 M 763 M INT1B: minimum bias 53.6 M MUS1B: single muon on INT M SH1B: high multiplicity (SPD) B = beams on both sides A and C > 700 TB of physics data All data read out are recorded

ALICE TRG/DAQ/HLT CHEP – Oct 2010P. Vande Vyvre – CERN/PH5 GDC TDSM CTP LTU TTC FERO LTU TTC FERO LDC BUSY Rare/All Event Fragment Sub-event Event File Storage Network PDS L0, L1a, L2 360 DDLs D-RORC EDM LDC D-RORC Load Bal. LDC D-RORC HLT Farm FEP DDL H-RORC 10 DDLs 10 D-RORC 10 HLT LDC 120 DDLs DA DQM DSS Event Building Network 430 D-RORC 125 Detector LDC 75 GDC 30 TDSM 18 DSS 60 DA/DQM 75 TDS Archiving on Tape in the Computing Centre (Meyrin)

SAN Evolution (1) CHEP – Oct 2010P. Vande Vyvre – CERN/PH6 FC4G 16 ports Server Storage FC4G 16 ports Server Storage (hw deployment 10-40% performance): - Storage Area Network (SAN): 1-4 FC switches (16 FC4G, 4 FC10G) - Up to 30 servers - Up 30 storage arrays FC4G 16 ports Server Storage FC4G 16 ports Server Storage

SAN Evolution (2) CHEP – Oct 2010P. Vande Vyvre – CERN/PH7 FC4G 16 ports Server Storage Server Storage FC4G 16 ports Server Storage FC4G 16 ports Server Storage FC10G 4 ports FC4G 32 ports Server Storage Server Storage Server Storage Server Storage 2009: (hw deployment 100% performance) - 2 enterprises FC switches (8 slots, 16 FC4G, 4 FC10G) servers over FC4G - 75 storage arrays

Transient Data Storage CHEP – Oct 2010P. Vande Vyvre – CERN/PH8 Storage Area Network (SAN): 180 ports FC4G 75 Transient Data Storage (TDS) storage arrays each divided in 3 RAID6 volumes Nodes accessing data over FC4G: 75 data formatting and writing-only nodes (GDC) 30 reading-only nodes exporting data files to Permanent Data Storage (PDS) Unique logical view by cluster file sharing ! GDC TDSM GDC Storage Network (FC4G) TDS Event Building Network (Gbit Ethernet) 75 GDC 30 TDSM 75 TDS PDS Archiving on Tape in the Computing Centre

Cluster File System CHEP – Oct 2010P. Vande Vyvre – CERN/PH9 Cluster File System (Quantum StorNext): Sharing of ~1000 disks by ~100 PCs Global file system (system management) Preserve hardware performance Make file system across all Racks “R” global file space Add “AFFINITIES” Certain directories are bound to certain Containers C1C2C3C4 C5C6C7C8 C9C10C11C12 C13C14C15C16 C17C18C19C20 C21C22C23C24 R1 R2 R3 /filespace/global_file.raw /filespace/R3/C22/ /filespace/R3/C22/local_file.raw

Preparation of the Heavy-Ion Run CHEP – Oct 2010P. Vande Vyvre – CERN/PH10 Detector readout to DAQ Up to 4.5 GB/s With or without data compression DAQ to computing center Up to 2.5 GB/s CPU usage

Data Quality Monitoring CHEP – Oct 2010P. Vande Vyvre – CERN/PH11 CR1 ACR CERN CC CAF Generic GUI Detector Shifter DQM/QA Shifter eLogBook On-Call Experts Detector GUI Detector Shifter DQM/QA Shifter Detector Team Offline ACR Projector AliEve Expert Access CR2 HLT nodes Detector code DA/DQM nodes AMORE DB Detector QAs (expert & shifter) Detector agents DA’s Prompt Reco 2x Prompt Reco 2x Histo, objects Obj. Histograms DAQ Histo, ESD’s

AMORE: ALICE DQM framework CHEP – Oct 2010P. Vande Vyvre – CERN/PH12 For more information: Tuesday 14:30 in the Auditorium Generic GUI: - Multiple agents - Multiple tabs

Electronic Logbook CHEP – Oct 2010P. Vande Vyvre – CERN/PH13 - Portal to the ALICE online - Access from outside the experimental area 1 Run => 1 Line Run Details View

DQM access through the eLogBook CHEP – Oct 2010P. Vande Vyvre – CERN/PH14

Experiment Operation CHEP – Oct 2010P. Vande Vyvre – CERN/PH15 Shift crew of 24 people at startup: heavy load on the collaboration. Unsustainable for very long ! Large effort to improve the situation Experiment automation by extension of the Experiment Control System Combine shifts and train shifters Addition of a tool to configure the whole experiment: ALICE Configuration Tool (ACT) Shift crew reduced from 24 to 6 persons

ALICE Configuration Tool CHEP – Oct 2010P. Vande Vyvre – CERN/PH16 Global configuration of the whole ALICE experiment. For more information: Poster PO-WED-008 on Wednesday

ALICE Upgrade CHEP – Oct 2010P. Vande Vyvre – CERN/PH17 Different upgrades are considered for the ALICE detector Modification or construction of a new Inner Tracking System (ITS) Addition of a Forward Calorimeter (FOCAL) Addition of a Very High Momentum Particle Identification (VHMPID) Faster readout for the TPC No decision yet on any of the above DAQ R&D started: PC’s evolution: from PCI-X to PCI-e Address the detector upgrades: cheaper or faster readout Improve the data taking efficiency by extension or addition of new software packages Improve the data taking efficiency by improving the service management (e.g. ITIL) Explicit service definition Improve the quality of service From organic to a more conscious evolution

PC evolution from PCI-X to PCI-e CHEP – Oct 2010P. Vande Vyvre – CERN/PH18 Readout of all detectors using 2 Gb/s optical links and PC adapter PCI-X PC evolution: PCI-e version of the adapter PCI-X 64 bits 100 MHz PCI-e 4x

Detector Readout Upgrade CHEP – Oct 2010P. Vande Vyvre – CERN/PH19 More options for the detector readout Legacy: DDL Low-cost: Ethernet/IP readout R&D for a High-End option: CERN PH-ESE versatile link Common DAQ and HLT RORC with 6 Gb/s links 10 Gb Eth (See below performance of DATE with 10 Gb Eth/IP readout)

Conclusion CHEP – Oct 2010P. Vande Vyvre – CERN/PH20 Lots of progress since startup Lots of pp data collected (close to the target of 10 9 pp events for year 1) DAQ includes a high performance storage system Ready for the Heavy Ion run ! Work has started on the upgrade