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Last update: Apr 1, 2000

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The Compass Computing Farm Project

Massimo Lamanna
 CERN IT and INFN Trieste

Speaker: Massimo Lamanna

  The Compass experiment (CERN) will start detector commissioning and data taking in year 2000; together with the CERN IT/PDP group proposed the Compass Computing Farm project (CCF).
  The CCF main tasks are:
  - central data recording (10G events at 35 MB/s many months a year)
  - reconstruction of all data (300 TB/y)
  - some analysis and filtering (samples below 1 TB will be exported)
  The estimated computing power is 2,000 SpecINT95, provided by some 100 PCs; Gigabit and Fast Ethernet are deployed. A disk pool of few TB is being setup: presently most of the disk space is SCSI but EIDE is under consideration.
  The solutions for the data storage are still under test, together with the development of the C++ reconstruction program. Presently, the events are stored as objects in Objectivity/DB; the data bases are moved between the disk pool and the tape system with HSM solutions (developed by IT/PDP).
  The present PC farm (Sep.1999) allows to sustain the 35 MB/s rate into Objectivity/DB using 11 PCs (Dual PII 450 MHz) for many hours in a realistic environment. The distribution of the events to the CPU clients (for reconstruction) is also under test.

Presentation:  Adobe Acrobat pdf Short Paper:  Adobe Acrobat pdf 

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