Evolution of the Italian Tier1 (INFN-T1) Umea, May 2009

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1 Evolution of the Italian Tier1 (INFN-T1) Umea, May

2 In 2001 the project of the Italian Tier1 in Bologna at CNAF was born. First computers were based on Intel Pentium 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. May

3 New infrastructure is based on 4 rooms: 1)Chiller cluster (5 + 1) 2)2 Mainframe rooms + Power Panel Room 3)1 Power station 4)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 ( ) rack APC Netshelter SX 42U 600mm Wide x 1070mm deep Enclosure. 15 KVolt Power station 3 Transformer (2 + 1 redundancy, 2500 KVA each one) RotaryUPS(2x1700KVA) 2 electrical lines (red and green, 230 Volt per phase, 3 phases + ground). Motor generator diesel engine: 1250 KVA ( cc) May

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 C H I L L E R C H I L L E R C H I L L E R C H I L L E R C H I L L E R Tubi H2O Setti fonoass. Chiller Canali uscita aria Flusso uscita aria Torre uscita aria 4

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 5

6 Sala chiller (piano -1) Sala calcolo (piano -2) Spazi consegna elettr. Spazi emergenza elettr. Spazi consegna elettr. Cabina consegna Corridoio cavi 15KV ENEL 15KV Quadri elettrici Sala di trasformazione Collaudo elettrico 6

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) 7

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

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

10 Foto impianto H2O 10

11 Foto chiller

12 Foto rack

13 Cooling and AC test 4kWh 4kWh 4kWh 4kWh 4kWh 4kWh 4kWh 4kWh 4kWh 4kWh 13

14 Remote Control May

15 Remote Control May

16 Remote Control May

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 17

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 May

19 Farming May

20 KSI2K used in 2009 May

21 KSI2K used by VOs May

22 Farming upgrade Q4/2009: 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 May

23 Farming: HEP-SPEC May

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 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 May

25 Tape libraries New SUN SL8500 in production since July 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 SL PB on line, b 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 May

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) May

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 May

28 Questions? May

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