BaBar Computing: Technologies and Costs

Transcription

1 BaBar Computing: Technologies and Costs October 11, 2000

2 BaBar Offline Systems: August 1999

3 SLAC-BaBar Data Analysis System 50/400 simultaneous/total physicists, 300 Tbytes per year HARDWARE UNITS End FY1999 End FY2000 estimate End FY2000 reality silos Tape Silos (STK Powderhorn, tapes each) Tape Drives (STK Eagle, 20 drives Gbyte, 10 Mbytes/s) Disk (net capacity of RAID arrays) Tbytes File Servers and Data Movers CPUs ~180 (Sun) Interactive Servers (Sun + CPUs ~140 Linux) Batch Servers (Sun + Linux) CPUs Network Switches (Cisco 6509) switches

4 Technologies: CPU System Purchase Date per CPU Cost $$$ SMP CPU Sun E10000, 64 procs (400 MHz), 32 GB ,000 Data Server CPU Sun E220R Tape Servers, 2 procs (450 MHz), 256 MB ,000 Sun E420R Objectivity Servers, 4 procs (450 MHz), 4 GB (19.6 SPECint95 and MHz) ,500 Dell Linux Objectivity Servers, 4 procs (700 MHz), 4GB not yet list 8800 Target server cost Dec-00 6,000 Farm CPU Sun Netra T1 (440 MHz) ,300 Dell 2450, 2 procs (733 Mhz), 512 MB (Dell 420 is 35.3 SPECint95 and MHz) Sep-00 2,000 Target farm cost (excluding infrastructure) Dec-00 1,600

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6 Some BaBar Servers: Build, Objy Catalog, Objy Journal, Objy Test...

7 Sun Netra T1 Farm now installing 450 machines about to order another 260

8 Technologies: Disk Disk System or File Server Purchase Date Raw Disk Cost/TB RAIDed Disk Cost/TB RAID+ Server Cost/TB Actuators per TB Sun A3500s (18GB disks) + 420R used for Objy 18 GB SCSI disks (1" thick) + 2*FCAL to 5*SCSI RAID Controller Feb-00 74,074 92, , Network Appliance F760s used for Kanga 36 GB (1" thick) FCAL disks Apr , Sun A3500s (36GB disks) + 420R used for Objy 36 GB (1" thick) SCSI disks + 2*FCAL to 5*SCSI RAID Controller Sep-00 42,593 53,241 64, SAG Array + Sun 220R 73 GB (1.6" thick) SCSI disks + 2*FCAL to 8*SCSI RAID Contoller Sep-00 26,907 31,197 35, Electronix IDE Disk RAID Array with SCSI Interface 75 GB (1" thick) IDE disks (Sun 220R with 4 arrays assumed) Sep-00 15,249 20,332 26,443 13

9 Sun A3500 disk arrays used by BaBar (about 20 TB)

10 NFS File Servers: Network Appliance F760 et al. ~ 3TB

11 Technologies: Tape System Purchase Date Cost $$$ per tape Cost $$$ STK Powderhorn Silo (no drives or media) , STK 9840 Eagle tape drive, 20 GB, 20 per silo , STK 9840 tape STK 9840 tape STK 9940 tape drive, 60 GB, 20 per silo Nov-00 22, STK 9940 tape Nov Future drive costs (10 per silo) , Future tape costs

12 STK Powderhorn Silo

13 Money and People

14 BaBar Offline Computing at SLAC: Costs other than Personnel (does not include per physicist costs such as desktop support, help desk, telephone, general site network) $M other net datamove tape Does not include tape media 4.00 disk farm cpu 2.00 smp cpu 0.00 FY 1997 FY 1998 FY 1999 FY2000 FY2001

15 BaBar Offline Computing at SLAC: Costs other than Personnel (does not include per physicist costs such as desktop support, help desk, telephone, general site network) $M Software Materials and Supplies Equipment 0.00 FY 1997 FY 1998 FY 1999 FY2000 FY 2001

16 BaBar Computing at SLAC: Personnel (SCS) People SLAC-SCS BaBar Applications SLAC-SCS Systems 0 FY 1997 FY 1998 FY 1999 FY 2000 FY 2001

17 BaBar Computing at SLAC: Personnel for Applications and Production Support 120 People Some guesses non-doe BaBar Applications and Production (at SLAC) DoE BaBar Applications and Production (at SLAC) SLAC-SCS BaBar Applications SLAC-SCS Systems 0 FY 1997 FY 1998 FY 1999 FY 2000 FY 2001

18 BaBar Computing Personnel The Whole Story? People M a n y g u e s s e s BaBar Physicists doing computing SLAC Physicists doing computing non-doe BaBar Applications and Production (at SLAC) DoE BaBar Applications and Production (at SLAC) SLAC-SCS BaBar Applications 0 SLAC-SCS Systems FY 1997 FY 1998 FY 1999 FY 2000 FY 2001

19 How much does it really cost to buy a CPU or a disk? Infrastructure (server, tape systems, network ) as a fraction of annual expenditure: FY 1997 FY 1998 FY 1999 FY % 56% 45% 37% Assume 37.5% infrastructure for 2001 on. (multiply physics CPU and disk costs by 1.6 to get total necessary expenditure).