11 September 2007Milos Lokajicek Institute of Physics AS CR Prague Status of the GRID in the Czech Republic NEC’2007

11 September 2007NEC'20072 Outline CZ pre-grid activities Grid activities Grid status –Networking –Distributed Tier2 center and its performance Conclusions

11 September 2007NEC'20073 CZ pre-grid activities Synergy of the Czech pre-grid activities in 90ties –Particle Physics –MetaCentrum Project –CESNET Particle physics active collaboration –DELPHI experiment on LEP at CERN –H1 experiment on HERA at DESY –Several smaller experiments –Collaboration groups Institutes of the Academy of Sciences of the Czech Republic Charles University in Prague Czech Technical University in Prague

11 September 2007NEC'20074 CZ pre-grid activities MetaCentrum Project –Collaboration of the Czech universities supercomputing centers –Create single computing environment for academic users –Single user login, same user interfaces and application interfaces independent on HW or OS –Single queuing system –OpenAFS Kerberized system, same authentication credentials –Originally Masaryk University in Brno, West Bohemia University in Plzen and Charles university in Prague –Now project of CESNET with contribution of Universities –Resources in 4 sites 1000 CPUs, mainly IA-32/64 architecture, Tens of TB disk space, tape archives in Plzen and Brno –Partner to international EGEE and EGI_DS (European Grid Initiative Design Study), national MediGRID project

11 September 2007NEC'20075 CZ pre-grid activities CESNET Czech scientific research network provider 1992 first ip line to Austria 1993 country-wide backbone network connecting 8 cities Member/stake holder of all important European network activities Today legal structure: Association of legal bodies created by Academy of Sciences of the Czech Republic and Czech Universities Connects all Czech Universities with high bandwidth network Current charge of CESNET –Research network, novel application over network, grid activities

11 September 2007NEC'20076 Grid activities Preparation of LHC project –Monarch project at CERN, widelly distributed hierarchical model –CHEP conference in Padova 2000 Reached agreement in HEP community of grid –EDG (European DataGRID) from 2001 And other parallel grid projects Similar situation in U.S.A. –Czech Republic (CESNET and Institute of Physics AS CR) took part from beginning Testbed and HEP applicaton, Logging and bookkeeping of the Workload management package –EGEE, EGEEII, … EGEEIII, EGI Design Study, CESNET as partner Preparation of local NGI (National Grid Initiative) – a tough task –LCG, WLCG – participation via Institute of Physics AS CR –Distributed TIER 2 center in Prague

11 September 2007NEC'20077 Grid Status Distributed TIER 2 center in Prague –Golias farm Institute of Physics AS CR –Skurut farm CESNET EGEEII –Pre/Production services –Reengineering – logging and bookkeeping, job provenance –VOCE – Central Europe Federation VO Proposed by CESNET Running it main services All purpose research VO for CE –AUGER VO support

11 September 2007NEC'20078 Grid Status Networking CESNET2 network –Integrated to GEANT2 –Highly reliable backbone of redundant circles of dark fibers –Cross-boarder connections

11 September 2007NEC'20079 Grid Status Special 1 Gbps infrastructure for HEP GLIF –Prague – FNAL D0 –Prague – Taipei ATLAS Tier1 –Prague - BNL soon in production GN –Prague – FZK ATLAS Tier1 GLIF GN2 Local 10/1 Gbps infrastructure in Prague –Collaborating groups in Academy of Sciences –Charles and Czech Technical Universities in Prague

11 September 2007NEC' TIER2 distributed center performance

11 September 2007NEC' TIER2 distributed center performance End 2007 capacities Main usage –D0 experiment simulations and reconstruction 50% –ATLAS, ALICE, STAR, VOCE, Auger computing, solid state physics –Support for VO: VOCE, Auger Preproduction and Preview testbeds Computing capacity kSI2k Number of coresDisk capacity TB GOLIAS SKURUT3038Shared from Golias

11 September 2007NEC' TIER2 distributed center performance Contribution to the D0 experiment 0.5 M events per week in 2006/ rd biggest contribution to simulations

11 September 2007NEC' TIER2 distributed center performance DPM transfer test Prague to Taipei 1 Gbps line, RTT 310ms, 50 streams per file, 10 files in parallel, size of file 1 GB, tcp buffer 100 MB 1 hour test, average 31 MB/s, maximum 53 MB/s Transfer Taipei to Prague only 20 MB/s, problems with Prague servers stability, further test ongoing

11 September 2007NEC' TIER2 distributed center performance Should be compared with FZK Karlsruhe to Prague transfer 1 Gbps line, 10 streams per file, 10 files in parallel, file size 1 GB, tcp buffer default value 5 hour test, average 48 MB/s, maximum 75 MB/s

11 September 2007NEC' TIER2 distributed center performance Monitoring – key for reliable service –both standard grid monitoring and local HW, SW and services monitoring Local monitoring (Talk of Tomas Kouba) –Nagios – various plugins and workarounds –Interface for dynamic configuraton of nagios according to our HW and SW database –Reduction of nagios warning Critical nagios warnings – distributed immediatelly Other warnings – summarized in a developped digest and distributed 3 times per day only

11 September 2007NEC' Conclusions Czech Republic – partner of EU grid projects from 2001 Activities both in grid deployment and reengineering Middle sized distributed TIER2 center fully integrated into EGEE/LCG environment –Delivery of well visible computing services to experiments and projects –Data transfer services over special lines –Support of VOs VOCE and Auger –Active contribution for reengineering – logging and bookkeeping and recently job provenance All this is supported by excellent quality of CESNET2 network and special E2E lines both local and international Taking part in preparation EGEEIII and EGI projects Big effort will be needed to create Czech NGI