The ALICE Framework at GSI Kilian Schwarz ALICE Meeting August 1, 2005

Overview  ALICE framework  What part of ALICE framework is installed where at GSI and how can it be accessed/used  ALICE Computing model (Tier architecture)  Resource consumption of individual tasks  Resources at GSI and GridKa

ALICE Framework ROOT AliRoot STEER Virtual MC G3 G4 FLUKA HIJING MEVSIM PYTHIA6 PDF CRT EMCALZDC FMD ITS MUON PHOSPMDTRD TPC TOF STRUCT START RICH RALICE EVGEN HBTP HBTAN ISAJET AliEn F. Carminati, CERN

Software installed at GSI: AliRoot  Installed at: /d/alice04/PPR/AliRoot  Newest version: AliRoot v  Environment setup via: >. gcc32login >. gcc32login >. alilogin dev/new/pro/version-number >. alilogin dev/new/pro/version-number  gcc not supported anymore  gcc not supported anymore  corresponding ROOT version initialized, too  corresponding ROOT version initialized, too * responsible person: Kilian Schwarz * responsible person: Kilian Schwarz

Software installed at GSI: ROOT (AliRoot is heavily based on ROOT)  Installed at: /usr/local/pub/debian3.0/gcc323-00/rootmgr  Newest version:  Environment setup via >. gcc32login / alilogin or rootlogin >. gcc32login / alilogin or rootlogin Responsible persons:Responsible persons: - Joern Adamczewski / Kilian Schwarz - Joern Adamczewski / Kilian Schwarz See also: also:

Software installed at GSI: geant3 (needed for simulation: accessed via VMC)  Installed at: /d/alice04/alisoft/PPR/geant3  Newest version: v1-3  Environment setup via gcc32login/alilogin  Responsible person: Kilian Schwarz

Software at GSI: geant4/Fluka (simulation: accessed via VMC)  Both so far not heavily used from ALICE  Geant4: standalone versions up to G4.7.1  newest VMC version: geant4_vmc_1.3  Fluka: not installed so far by me  Environment setup via >. gsisimlogin [-vmc] dev/new/prod/version >. gsisimlogin [-vmc] dev/new/prod/version See also linux.gsi.de/~gsisim/g4vmc.htmlSee also linux.gsi.de/~gsisim/g4vmc.htmlhttp://www- linux.gsi.de/~gsisim/g4vmc.htmlhttp://www- linux.gsi.de/~gsisim/g4vmc.html Responsible person: Kilian SchwarzResponsible person: Kilian Schwarz

Software at GSI: event generators (task: simulation)  Installed at: /d/alice04/alisoft/PPR/evgen  Available: - Pythia5 - Pythia5 - Pythia6 - Pythia6 - Venus - Venus Responsible person: Kilian SchwarzResponsible person: Kilian Schwarz

Software at GSI: AliEn The ALICE Grid Environment  Currently being set up in the version2 (AliEn2)  Installed at: /u/aliprod/alien  Idea: global production and analysis  Environment setup via..alienlogin  Copy certs from /u/aliprod/.globus or register own certs  Usage: /u/aliprod/bin/alien (proxy-init/login)  Then: register files and submit grid-jobs  Or: directly from ROOT !!!  Status: global AliEn2 production testbed currently being set up.  Will be used for LCG SC3 in September  Individual analysis of globally distributed Grid data at the latest during LCG SC via AliEn/LCG/PROOF  Non published analysis possible already now: - create AliEn-ROOT Collection (xml file readable via AliEn) - create AliEn-ROOT Collection (xml file readable via AliEn) - analyse via ROOT/PROOF (TFile::Open(“alien://alice/cern.ch/production/…”) - analyse via ROOT/PROOF (TFile::Open(“alien://alice/cern.ch/production/…”) - Web Frontend being created via ROOT/QT - Web Frontend being created via ROOT/QT  Responsible person: Kilian Schwarz

AliEn2 services (see Local scheduler ALICE VO – central services Central Task Queue Job submission File Catalogue Configuration Accounting User authentication Computing Element Workload management Job Monitoring Storage Element(s) DB Data Transfer Storage Element Cluster Monitor AliEn Site services Disk and MSS Existing site components ALICE VO – Site services integration

Software at GSI: Globus  Installed at: /usr/local/globus2.0 and /usr/local/grid/globus /usr/local/grid/globus  Versions globus2.0 and 2.4  Idea: can be used to send batch jobs to GridKa (far more resources available than at GSI)  Environment setup via:. globuslogin  Usage: > grid-proxy-init (Grid certificate needed !!!) > grid-proxy-init (Grid certificate needed !!!) > globus-job-run/submit alice.fzk.de Grid/Batch job > globus-job-run/submit alice.fzk.de Grid/Batch job Responsible person: Victor Penso/Kilian SchwarzResponsible person: Victor Penso/Kilian Schwarz

GermanGrid CA How to get a certificate in detail: See

Software at GSI: LCG  Installed at: /usr/local/grid/lcg  Newest version: LCG2.5  Idea: global batch farm  Environment setup:. lcglogin  Usage: > grid-proxy-init (Grid certificate needed !!!) > grid-proxy-init (Grid certificate needed !!!) > edg-job-submit batch/grid job (jdl-file) > edg-job-submit batch/grid job (jdl-file) See also: also: Responsible person: Victor Penso, Anar Manafov, Kilian SchwarzResponsible person: Victor Penso, Anar Manafov, Kilian Schwarz

LCG: the LHC Grid Computing project (with ca. 11k CPUs world’s largest Grid Testbed)

Software at GSI: PROOF  Installed at: /usr/local/pub/debian3.0/gcc323-00/rootmgr  Newest version: ROOT  Idea: parallel analysis of larger data sets for quick/interactive results  Personal PROOF Cluster at GSI, integrated in batch farm, can be set up via > prooflogin (e.g. number of slaves, data to be analysed, -h (help)) > prooflogin (e.g. number of slaves, data to be analysed, -h (help)) See also: also: Later personal PROOF Cluster including GSI and GridKa via Globus possibleLater personal PROOF Cluster including GSI and GridKa via Globus possible Later global PROOF Cluster via AliEn/D-Grid possibleLater global PROOF Cluster via AliEn/D-Grid possible Responsible person: Carsten Preuss, Robert Manteufel, Kilian SchwarzResponsible person: Carsten Preuss, Robert Manteufel, Kilian Schwarz

Parallel Analysis of Event Data root Remote PROOF Cluster proof TNetFile TFile Local PC $ root ana.C stdout/obj node1 node2 node3 node4 $ root root [0] tree.Process(“ana.C”) $ root root [0] tree.Process(“ana.C”) root [1] gROOT->Proof(“remote”) $ root root [0] tree.Process(“ana.C”) root [1] gROOT->Proof(“remote”) root [2] dset->Process(“ana.C”) ana.C proof proof = slave server proof proof = master server #proof.conf slave node1 slave node2 slave node3 slave node4 *.root TFile

LHC Computing Model (Monarc and Cloud) LHC Computing Model (Monarc and Cloud) One Tier 0 site at CERN for data taking ALICE (Tier 0+1) in 2008: 500 TB disk (8%), 2 PB tape, 5.6 MSI2K (26%) Multiple Tier 1 sites for reconstruction and scheduled analysis 3 PB disk (46%), 3.3 PB tape 9.1 MSI2K (42%) Tier 2 sites for simulation and user analysis 3 PB disk(46%), 7.2 MSI2K (33%)

ALICE Computing model more in detail:  T0 (CERN): long term storage for raw data, calibration and first reconstruction  T1 (5, in Germany GridKa): long term storage of second copy of raw data, 2 subsequent reconstructions, scheduled analysis tasks, reconstruction of MC Pb-Pb data, long term storage of data processed at T1s and T2s  T2 (many, in Germany GSI): generate and reconstruct simulated MC data and chaotic analysis  T0/T1/T2: short term storage in multiple copies of active data  T3 (many, in Germany  T3 (many, in Germany Münster, Frankfurt, Heidelberg, GSI) chaotic analysis

CPU requirements and Event size p-p / KSI2k x s/ev. Heavy Ion KSI2k x s/ev. Reconstruction5.468 Scheduled analysis Chaotic analysis Simulation (ev. cr. and rec.) (2-4 hours on standard PC) Raw / MB ESD / MB AOD / MB Raw MC ESD MC p-p Heavy Ion

ALICE Tier resources Tier0Tier1sTier2sTotal CPU (MSI2k) Disk (PB) Tape (PB) Bandwidth in (Gb/s) Bandwidth out (Gb/s)

GridKa (1 of 5 T1s) GridKa (1 of 5 T1s) IN2P3, CNAF, GridKa, NIKHEF, (RAL), Nordic, USA (effective ~5) ramp up time: due to shorter runs and reduced luminosity at the beginning not full resources needed: 20% 2007, 40% 2008, 100% end of Total Status CPU (kSI2k) Disk (TB) 28 (50% used) Tape (TB)

GSI + T3(support for the 10% German ALICE members) +++Total Status CPU (kSI2k) 64 Dual P4, 20 DP3, (80 DOpteron new bought) (800) T3 Disk (TB) 2.23 (0.3 free) – 15 TB new T3 Tape (TB) 190 (100 used) T3: Münster, Frankfurt, Heidelberg, GSI