Readiness of ALICE RDIG computing for the data

taking and analysis of LHC first data

Galina Shabratova, JINR, ALICEThis activity is supported by

INTAS+CERN grant N 05-103-7484

Agenda

• ALICE vision of T2 tasks in CCommon CComputing RReadiness CChallenge 2008 -CCRC’08

• RDIG participation in the realization of these tasks

• Communication with Tier 1 • Participation of physics in GRIG

analysis

ALICE in CCRC`08

• CCommon CComputing RReadiness CChallenge 2008 -CCRC’08 is a combined effort between the 4 experiments plus the sites serving the experiments– The 4 experiments together running and stressing the

services simultaneously

• The goal is the measurement of the readiness of the Grid services and operations before the real data taking– Identify problems early and allow time for fixing

• It will be complementary to the experiment Full Dress Rehearsals - FDR

• Two slots foreseen: February and May 2008– ALICE FDR will be in the 3rd phase: All Grid services will be

in place

FDR + CRC`08: Grid Services

• ALICE requires the services already provided during the Data Challenges

– VOBOXES deployed at all ALICE T0-T1-T2 sites• To migrate to gLite WMS, ALICE requires the latest version of the

gLite3.1 VOBOX – Configuration just finished, pending the full deployment

• All sites will have to be updated to the latest version– Pilot version in production deployed in voalice03@CERN – Full deployment will be coordinated with the sites to ensure a transparent migration for the

FDR

– FTS service from T0-T1• This exercise tests also SRM2.2• FTS channel sharing and rates as during the T0-T1 exercise in

2006/2007• During the proposed slots, ALICE wishes to test all Grid

services simultaneously (as it is planned in the CCRC)– ALICE wishes to see a special emphasis on the storage solutions

• These already have a maximal priority internally in ALICE at this moment

– What the experiment would like to see by the time of CCRC’08 is the deployment of standard gLite storage solutions with xrootd on all sites supporting ALICE

CCRC 4/03/2008CCRC 4/03/2008 55

Data management – focus and Data management – focus and status(status(4.03.20084.03.2008))

• Quasi-online RAW data replication T0->T1Quasi-online RAW data replication T0->T1– OK, ongoingOK, ongoing

• Replication of specific data (ESDs, calibration Replication of specific data (ESDs, calibration and special runs) to T2sand special runs) to T2s– Ongoing, done on request by the detector groupsOngoing, done on request by the detector groups

• Deployment of xrootd-enabled storage across all Deployment of xrootd-enabled storage across all ALICE T1s and as many T2s as possibleALICE T1s and as many T2s as possible– All T1s have deployed or are in the process of All T1s have deployed or are in the process of

deployingdeploying– 6 T2s have deployed considerable storage capacities 6 T2s have deployed considerable storage capacities

(in production), more are joining (in production), more are joining

RDIG usage in November 2007 DC ALICE

Wall ~9%

CompletedJobs ~7%

RDIG usage in February 2008 DC ALICE

Wall ~3%

Completed Jobs ~1%

RDIG usage in March 2008

RDIG CPUs for ALICE

RDIG CPUs for ALICE Total number of Jobs run per VONormalized CPU time Si2k =1000

RDIG CPUs for ALICE at different sites

RDIG CPUs for ALICE at different sites

Normalized CPU time Si2k =1000

Services status

Sites

Services

CPU clusters

VO box RB or WMS

SE:xrootd

1 IHEP two SL3 RB dCache v1.7

2 ITEP two SL3 =>SL4 RB dCache v1.8

3 INR one SL4 RB DPM

4 JINR two SL4 WMS dCache v1.8

5 PNPI one SL4 WMS DPM

6 RRC-KI ? ? ? ?

7 SINP three SL3 RB DPM

8 SPbSU one SL3 =>SL4 RB DPMToday 200 TB, pledged by RDIG sites are available, it is needed to realize the xrootd access to this space in the close time.

Tier1-Tier2 communication

RDIG , pledged for 2008 FZK

CPU DISK T2=>T1 T1=>T2

kSi2k TByte Mbyte/sec Mbyte/sec

1100 250 31.8 59.3

Mega Table

• There is no specific plan for FZK->RDIG T2 transfers. ALICE scenario does not specify the source T1 for the data to a given T2, only the opposite (custodial storage of T2 data on a T1). In principle, any T1 hosting data requested by a T2 will be used.

• The CCRC'08 planning requirements did T2s transferschedules. In principle there will be done replication that as needed, for example the portions of raw data to be made available at RDIG site, whenever it is operational. Any ESD replication will be democratically shared among all working T2 SEs.

Participation of physics in GRIG analysis

• 26 RDIG persons have workable RDIG certificate and registered in VO ALICE.

• They were (2007) and are participating today : - in the physics analysis(from ESD to AOD) For central detectors, - test of software functionality in the processing of cosmic exposition data for MUON and PHOS sub detectors,

- development of RAW from beam-test and simulated data

to ESD for PHOS, - calibration , … for PHOS

• The large part of this activity is connecting with CERN PROOF cluster – CAF (CERN Analysis Facility) – cluster for the parallel data processing

• It is started today an application of the PROOF tool for the processing analysis at the JINR: - first step at the 4 cores PC

To be done

• Finalize the migration of middle ware at RDIG ALICE sites to gLite services, migration of SE to xrootd-SE.

• Replicate part of RAW data (exposition in the cosmic ray,…) , ESD data to JINR xrootd-SE.

• Install the PROOF interactive cluster for the GRID interactive analysis activity of ALICE JINR & RDIG members

Conclusion

• ALICE RDIG computing is ready for the processing and analysis of the first data at LHC

List of VO ALICE members, certificated by RDIG.

ITEP

• /C=RU/O=RDIG/OU=users/OU=itep.ru/CN=Alexander Selivanov  • /C=RU/O=RDIG/OU=users/OU=itep.ru/CN=Yevgeniy Lyublev ALICE  • /C=RU/O=RDIG/OU=users/OU=itep.ru/CN=Yevgeniy Lyublev• /C=RU/O=RDIG/OU=users/OU=itep.ru/CN=Sergey Kiselev  • /C=RU/O=RDIG/OU=users/OU=itep.ru/CN=Kirill Voloshin• /C=RU/O=RDIG/OU=users/OU=itep.ru/CN=Boris Zagreev     

IHEP

• /C=RU/O=RDIG/OU=users/OU=ihep.su/CN=Yuri Kharlov

List of VO ALICE members, certificated by RDIG.

INR

• /C=RU/O=RDIG/OU=users/OU=inr.ru/CN=Marina Golubeva  • /C=RU/O=RDIG/OU=users/OU=inr.ru/CN=Alexander Kurepin    • /C=RU/O=RDIG/OU=users/OU=inr.ru/CN=Vitaly Gorlychev   • /C=RU/O=RDIG/OU=users/OU=inr.ru/CN=Alla Maevskaya   

JINR

• /C=RU/O=RDIG/OU=users/OU=jinr.ru/CN=Petr Nomokonov  • /C=RU/O=RDIG/OU=users/OU=jinr.ru/CN=Anatoli Fedunov   • /C=RU/O=RDIG/OU=users/OU=jinr.ru/CN=Lucia Jancurova  • /C=RU/O=RDIG/OU=users/OU=jinr.ru/CN=Galina Shabratova• /C=RU/O=RDIG/OU=users/OU=jinr.ru/CN=Smbat Grigoryan• /C=RU/O=RDIG/OU=users/OU=jinr.ru/CN=Boris Batyunya• /C=RU/O=RDIG/OU=users/OU=jinr.ru/CN=Sergey Zaporozhets• C=RU/O=RDIG/OU=users/OU=jinr.ru/CN=Mikalai Kutouski  

List of VO ALICE members, certificated by RDIG.

RRC-KI 

• /C=RU/O=RDIG/OU=users/OU=grid.kiae.ru/CN=Eygene Ryabinkin atALICE      • /C=RU/O=RDIG/OU=users/OU=grid.kiae.ru/CN=Dmitri Peressounko • /C=RU/O=RDIG/OU=users/OU=grid.kiae.ru/CN=Ivan Kolesnikov

PNPI 

•  /C=RU/O=RDIG/OU=users/OU=pnpi.nw.ru/CN=Dmitry Yakorev       • /C=RU/O=RDIG/OU=users/OU=pnpi.nw.ru/CN=Evgeny Kryshen   

SPbSU  • /C=RU/O=RDIG/OU=users/OU=spbu.ru/CN=Andrey Ivanov • /C=RU/O=RDIG/OU=users/OU=spbu.ru/CN=Andrey Zarochentsev