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OffLine Physics Computing

Simulation Recontruction Batch Data analysis Interative analysis. OffLine Physics Computing. High data volumes (disks, tapes, tape robots) Standard I/O packages Little file sharing Fortran. Applications Characteristics. SHIFT Motivations. Exploit cheap RISC technology spin-off

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OffLine Physics Computing

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  1. Simulation Recontruction Batch Data analysis Interative analysis OffLine PhysicsComputing

  2. High data volumes (disks, tapes, tape robots) Standard I/O packages Little file sharing Fortran ApplicationsCharacteristics

  3. SHIFT Motivations • Exploit cheap RISC technology spin-off • Exploit cheap SCSI technology • Exploit HOPE success • Answer to HEP computing always growing needs

  4. Mainframe quality Scalable (down & up) Heterogeneous (open) Integrated Minimal (portable) SW development SHIFT Goals

  5. SHIFT Model CPU Server CPU Server CPU Server CPU Server CPU Server CPU Server Disk Server Disk Server High Speed Interconnect Tape Server Tape Server Tape Server

  6. Pseudo Distributed File System Tape Access Batch queues SHIFT Software

  7. Disk Pool Manager Remote Tape Copy Clustered Batch Queues Remote File I/O Integration with I/O packages Unix Tape Control System Operator Interface Monitoring SHIFT Software

  8. CORE

  9. CPU usage Week 1-42 1992

  10. SHIFT Stagestatistics Week 1-43 1992 Gigabytes SUN/STK stage data/drive/week : 48 GB

  11. Tape mountstatistics Week 1-43 1992 IBM Mounts/Drive/Week 215 SUN/STK Mounts/Drive/Week 253

  12. RISC + SCSI cost effective CSF style easy to solve (Remote) I/O is the major problem Administration is complex Really scalable Conclusions

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