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Evolution of the Italian Tier1 (INFN-T1)

Evolution of the Italian Tier1 (INFN-T1). Umea, May 2009 Felice.Rosso@cnaf.infn.it. In 2001 the project of the Italian Tier1 in Bologna at CNAF was born.

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Evolution of the Italian Tier1 (INFN-T1)

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  1. Evolution of the Italian Tier1 (INFN-T1) Umea, May 2009 Felice.Rosso@cnaf.infn.it

  2. In 2001 the project of the Italian Tier1 in Bologna at CNAF was born. First computers were based on Intel Pentium III @ 800 MHz, 512 Mbytes of RAM , 20 GBytes of local storage and 100 Mbit/sec network interface. No redundancy: 1 chiller, 1 electric line power, 1 static UPS (based on chemical batteries), 1 motor generator diesel engine, no remote control. Maximum usable electric power was 1200 KVA, that means maximum 400 KVA for computers. Situation not compatible with HEP experiment requests. We decided to rebuild everything! In 2008 works started for the new mainframe rooms and new power station. Today all works are finished, all is up&running. We are on time and the original schedule was fully respected. Total infrastructure redundancy and total remote control. 2

  3. New infrastructure is based on 4 rooms: • Chiller cluster (5 + 1) • 2 Mainframe rooms + Power Panel Room • 1 Power station • 2 Rotary UPS and 1 diesel motor generator • Chiller cluster: 350 KWatt cooled per chiller: in best effiency (12C in  7C out) ratio 2:1, 50 KWatt needed to cool 100 KWatt • Mainframe: more than 100 (48 + 70) rack APC Netshelter SX 42U 600mm Wide x 1070mm deep Enclosure. • 15 KVolt  Power station  3 Transformer (2 + 1 redundancy, 2500 KVA each one)  Rotary UPS (2 x 1700 KVA)  2 electrical lines (red and green, 230 Volt per phase, 3 phases + ground). • Motor generator diesel engine: 1250 KVA (60.000 cc) 3 3

  4. Sala chiller (piano -1) Sala calcolo (piano -2) Spazi consegna elettr. Spazi emergenza elettr. Sala chiller (piano -1) Quadri elettrici dei chiller Muro Quadri elettrici Tubi H2O CHI LLER CHI LLER CHI LLER CHI LLER CHI LLER Setti fonoass. Chiller Canali uscita aria Flusso uscita aria Torre uscita aria

  5. Sala chiller (piano -1) Sala calcolo (piano -2) Spazi consegna elettr. Spazi emergenza elettr. Sala calcolo (piano -2) Quadri (power panel) Blindo bar Rack

  6. Sala chiller (piano -1) Sala calcolo (piano -2) Spazi consegna elettr. Spazi emergenza elettr. Spazi consegna elettr. Cabina consegna Corridoio cavi 15KV Sala di trasformazione ENEL 15KV Quadri elettrici TR1 TR2 Quadri elettrici TR3 V i a R a n z a n i Collaudo elettrico

  7. Sala chiller (piano -1) Sala calcolo (piano -2) Spazi consegna elettr. Spazi emergenza elettr. Spazi emergenza elettr. 2 cisterne gasolio (diesel oil tank) 2 gruppi rotanti (rotary UPS)

  8. Spazi consegna elettr. Sala chiller (piano -1) Sala calcolo (piano -2) Spazi emergenza elettr.

  9. Spazi consegna elettr. Sala chiller (piano -1) Sala calcolo (piano -2) Spazi emergenza elettr.

  10. Foto impianto H2O

  11. Foto chiller

  12. Foto rack

  13. Cooling and AC test 4kWh 4kWh 4kWh 4kWh 4kWh 4kWh 4kWh A/C A/C A/C A/C A/C A/C A/C A/C 4kWh 4kWh A/C A/C A/C A/C A/C A/C A/C A/C 4kWh A/C A/C A/C A/C A/C A/C A/C A/C A/C A/C A/C A/C A/C A/C A/C A/C

  14. Remote Control

  15. Remote Control

  16. Remote Control

  17. Network Upgrade: New Core Switch Buy of the new Core Switch is in progress. Minimum request: • 64 fiber ports 10 Gbit/sec (over subscriptions allowed 4:1) • 90 fiber ports 1 Gbit/sec Allowed upgrade requested: • 100 Gbit/sec fiber ports • 128 fiber ports 10 Gbit/sec without over subscriptions

  18. INFN-T1 WAN connection today • INFN-T1  CERN (T0): 10 Gbit/sec • INFN-T1  FZK (T1): 10 Gbit/sec [backup of INFN-T1 CERN] + IN2P3 + SARA link • INFN-T1  General purpose: 10 Gbit/sec

  19. Farming

  20. KSI2K used in 2009

  21. KSI2K used by VOs

  22. Farming upgrade • Q4/2009: +20.000 HEP-SPEC installed • No more FSB technology (Nehalem and Shanghai only) • Option to buy in 2010 directly (less bureaucracy) • Remote Console • ~50% for LHC experiments • We support more than 20 experiments/collaborations

  23. Farming: HEP-SPEC

  24. Disk Storage Systems • All systems interconnected in a SAN • 12 FC switches (2 core switches) with 2/4 gbps connections • ~ 200 disk-servers • ~ 2.6 PB raw (~ 2.1 PB-N) of disk-spac • 13 EMC/DELL Clarion CX3-80 systems (SATA disks) interconnected to SAN • 1 dedicated to databases (FC disks) • ~ 0.8 GB/s bandwidth • 150-200 TB each • 12 disk-servers (2 x 1 gbits uplinks + 2 FC4 connections) part configured as gridftp servers (if needed), 64 bits OS (see next?? slide) • 1 CX4-960 (SATA disks) • ~ 2 GB/s bandwidth • 600 TB • Other older hw (Flexline, Fast-T etc..) being progressively phased out • No support (part used as cold spares) • Not suitable for GPFS 24

  25. Tape libraries • New SUN SL8500 in production since July’08 • 10000 slots • 20 T10KB drives (1 TB) in place • 8 T10KA (0.5 TB) drives still in place • 4000 tapes on line (4 PB) • “old” SUN SL5500 • 1 PB on line, 9 9940b and 5 LTO drives • Nearly full • No more used for writing • Repack on going • ~5k 200 GB tapes to be repacked • ~ 500 GB tapes 25

  26. How experiments use the storage • Experiments present at CNAF make different use of (storage) resources • Some use almost only the disk storage (e.g. CDF, BABAR) • Some use also the tape system as an archive for older data (e.g. VIRGO) • The LHC experiments exploit the functionalities of the HSM system… • ….but in different ways • CMS and Alice) use primarily the disk with tape back-end, while others Atlas and LHCb concentrate their activity on the disk-only storage (see next slide for details) • Standardization over few storage systems, protocols • Srm vs. direct access • file, rfio, as LAN protocols • Gridftp as WAN protocol • Some other protocols used but not supported (xrootd, bbftp)

  27. STORAGE CLASSES • 3 class of services/quality (aka Storage Classes) defined in WLCG • Present implementation at CNAF of the 3 SC’s • Disk1 Tape0 (D1T0 or online-replica)  GPFS/StoRM • Space managed by VO • Mainly LHCb, Atlas, some usage from CMS and Alice • Disk1 Tape1(D1T1 or online-custodial)  GPFS/TSM/StoRM • Space managed by VO (i.e. if disk is full, copy fails) • Large buffer of disk with tape back end and no garbage collector • LHCb only • Disk0 Tape1 (D0T1 or nearline-replica)  CASTOR • Space managed by system • Data migrated to tapes and deleted from disk when staging area full • CMS, LHCb, Atlas, Alice • testing GPFS/TSM/StoRM This setup satisfies nearly all WLCG requirements (so far) exception made for: • Multiple copies in different Storage Area for a sURL • Name space orthogonality

  28. Questions?

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