1. PC clusters in KEK A.Manabe KEK(Japan)

2. 22 May '01LSCC WS '012 PC clusters in KEK s Belle (in KEKB) PC clusters s Neutron Shielding Simulation cluster s Some other activity on PC cluster

3. 22 May '01LSCC WS '013 Belle PC cluster s Utilized for experimental data production. ‘raw data’ to ‘reconstructed data’. s >400 CPUs by 3 clusters s Cooperation with SUN servers for I/O (B computer system) s Number of Users is rather small. (<5) s Major PCs are 4 CPU SMP machines. Homemade SW ‘basf’ for SMP processing. (old system was by 28cpu SMP servers)

4. 22 May '01LSCC WS '014 Belle PC cluster (1) s since 1999 s CPU nodes - DELL PowerEdge 6300 (4CPU@ Pentium III Xeon 500MHz+9Gdisk) x 36 s Disk nodes (2CPU+800GB (Arena) RAID DISK) x 8 s Switch 100BaseT Switch 1000BaseSX: uplink to B computer system k Installed by physicists, Rack is homemade

5. 22 May '01LSCC WS '015 Belle PC cluster1,2 Cluster 1 Cluster 2

6. 22 May '01LSCC WS '016 Belle PC cluster (2) s since 2000 winter s CPU nodes - Compaq Proliant DL360 (2CPU x Pentium III 800-900MHz+9Gdisk)x40 s Disk nodes (2CPU + 1.2TB RAID disk)x4 s Installed by Compaq (HW and SW) (~1week for all installation)

7. 22 May '01LSCC WS '017 Belle PC cluster(3) s since 2001 March s CPU nodes - Compaq ProLiant D580 ( 4CPU@ Pentium III Xeon 700MHz +50GBdisk)x60 s Switch 100BaseT to each nodes 1000BaseSX to B computer system s 5 years lease included in the B computer budget. Installation service; initial and a few/year.

8. 22 May '01LSCC WS '018 Belle PC cluster3

9. 22 May '01LSCC WS '019 SW Tape Library PC Disk Server SUN WS 1. PC nodes 2. 3. 1. TCP data transfer SW copy a RAW data file in tape to files in Disk server. (9MB/s) 2. Production jobs running in PC nodes reading/writing from/to the file using NFS. 3. write back Reconstructed data files to a tape or HSM system.

10. 22 May '01LSCC WS '0110 Some numbers s 1 event processing takes about 6 sec by 1GHz Pentium III s 1 job =1 exp. run ~16GB = 32files 10~20 hours by 4CPU(1PC node) s Job submission is done manually with help of Perl scripts and a DB managing exp. run information.

11. Belle PC cluster summary s Belle PC cluster 464 CPU (500-933MHz), 256MB memory /CPU ~14TB disk (RAID ~10TB,local~4TB) 100BaseT network s B computer system (data server and general users) ~40 SUN servers (each has a DTF2 tape drive) Tape Library 500TB (Sony DTF2) ~20 NFS/HSM* Disk (~10TB RAID) servers HSM=Hierarchical Storage Management System

12. 22 May '01LSCC WS '0112 Simulation farm for the HIPAF beam line design. s High Intensity Proton Accelerator Facility 50GeV 15microA s Simulation for Neutron beam line design and neutron radiation shielding. s ~50 x (2 CPU@1GHz Pentium III) s NMTC, MCNP on MPI s Will be Installed in this year

13. 22 May '01LSCC WS '0113 Other Activity s PC farm I/O R&D by the comp. center HPSS (Linux HPSS client API driver by IBM) Storage Area Network (with Fujitsu) s GRID Activity for ATLAS Regional Center in Japan. Gfarm (http://datafarm.apgrid.org/index.en.html)