Si GNET Slovenian Production Grid Marko Miku Univ

Si. GNET – Slovenian Production Grid Marko Mikuž Univ. Ljubljana & J. Stefan Institute on behalf of Si. GNET team ICFA DDW’ 06 Kraków, 10 th October 2006

Overview n n About Si. GNET Status of production cluster ATLAS production Plans for the future ICFA DDW’ 06 Si. GNET 2

Si. GNET n n n What is Si. GNET ? Slovenian Grid NETwork A two-faced creature ¡ ¡ n Cluster in EGEE (now) NGI in Si (future) Please keep in mind Slovenia is a country of just 2 million people… ICFA DDW’ 06 Si. GNET 3

Si. GNET Roots n n n Particle Physics Department of Jožef Stefan Institute, Ljubljana Active in ATLAS since 1996 Facing ATLAS computing challenge ¡ Ø Ø Grid essential to maintain home base Introduce (production) Grid to Slovenia Spin-off of HEP to society ICFA DDW’ 06 Si. GNET 4

Si. GNET History n n CEGC foundation - January 03 Acquisition of first cluster - late 03 EGEE-I - April 04 EGEE-II - April 06 Resources Servers CPU Disk (TBy) ICFA DDW’ 06 2004 2 42 2 2005 3 100 8 Si. GNET 2006 5 150 25 5

Si. GNET Team n Most of the team from HEP (origin) ¡ ¡ ¡ Andrej Filipčič Jan Jona Javoršek Matej Horvat Borut Paul Kerševan Dejan Lesjak ICFA DDW’ 06 Si. GNET 6

Si. GNET Activities n n LCG/EGEE computing element (CE) and storage element (SE) Nordugrid CE/SE ATLAS TIER-2 (formalities pending) CA authority (EUGrid. PMA) ICFA DDW’ 06 Si. GNET 7

Si. GNET Cluster n 150 AMD processors ¡ ¡ ¡ n 25 TBytes disk space ¡ ¡ n n 51 rack mounts (dual Opteron) 24 desktops (dual-core Athlon) Performant Riverstone GB switch 3 SATA-SCSI RAID units Fibre channel switch Small tape/robot unit (8 TB) 1 Gb/s shared link to GEANT ICFA DDW’ 06 Si. GNET 8

Si. GNET Servers n 3 NFS/AFS servers: (Gentoo 2006. 1) ¡ ¡ n 2 g. Lite CE/SE (SLC 3) ¡ ¡ n torque/maui, Nordugrid CE/SE Production Pre-production d. Cache server in testing phase (providing SE to both g. Lite and Nordugrid) ICFA DDW’ 06 Si. GNET 9

Installed Software/Middleware n Gentoo linux 2006. 1 ¡ ¡ n 2. 6. 17 kernel torque/maui queuing system with afs patches Running ATLAS grid production via (several) chroot-ed SLC 3 environments: ¡ ¡ Single NFS image per system flavour - easy maintenance Several OS-es available for all nodes concurrently Negligible overhead as compared to XEN/vmware Customizable authentication, FS access ICFA DDW’ 06 Si. GNET 10

Installed Software/Middleware n n Entering chroot in PBS scripts via custom shell (example: #!/usr/uchroot. slci 386) Operational grids: all on the same cluster ! ¡ ¡ ¡ ICFA DDW’ 06 g. Lite production (Si. GNET) g. Lite pre-production (PPS-Si. GNET) Nordugrid production Si. GNET 11

ATLAS CSC (DC 3) Performance Si. GNET: 5% via NORDUGRID 1. 1% via LCG ICFA DDW’ 06 Si. GNET 12

Middleware problems n EGEE – ¡ ¡ n high failure rate in ATLAS production most due to interconnectivity Nordugrid – ARC ¡ ¡ missing features for full ATLAS support but high reliability n ICFA DDW’ 06 maximum recent throughput: 2500 (short) jobs/day, no failure ! Si. GNET 13

CA Activities n n n Si. GNET CA is up and running within EUGrid. PMA/IGTF Providing certificates to local users and servers Certificate and services monitoring with NAGIOS ICFA DDW’ 06 Si. GNET 14

Slovenian Networking n n n ARNES – Academic and Research NEtworking of Slovenia - Slovenian NREN Full national member of TERENA, shareholder in DANTE, member in CEENet and RIPE International connectivity through GEANT(2) – extensive use of dark fibre ICFA DDW’ 06 Si. GNET 15

Plans up to 2008 n n n Formalize TIER-2 status in WLCG Increase #CPUs to total of ~300 Increase disk space to ~150 TB Provide support for Slovenian local VO 1 Gb/s custom link to TIER-1 + 10 Gb/s shared link within ICFA DDW’ 06 Si. GNET 16

Plans to 2008 and beyond n Develop TIER-2 to exploit LHC data WLCG TIER-2 Si. GNET, Jožef Stefan Institute Pledged Planned to be pledged 2006 2007 2008 2009 2010 CPU (k. SI 2 K) 150 200 300 450 600 Disk (Tbytes) 20 50 150 200 300 Nominal WAN (Gbits/sec) 10 10 nx 10 n n Disseminate Grid to other fields Establish true Slovenian NGI Ø Si. GNET ICFA DDW’ 06 Si. GNET 17