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Scientific Computing Facilities for CMS Simulation

Scientific Computing Facilities for CMS Simulation. Shams Shahid Ayub CTC-CERN Computer Lab. Focus of this Presentation. CMS MC Data Production Data Production Requirements Data Storage / Data Transfer Requirements A Solution: A Beowulf / Linux PC Cluster(H/W & S/W) Our Current Status

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Scientific Computing Facilities for CMS Simulation

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  1. Scientific Computing Facilities for CMS Simulation Shams Shahid Ayub CTC-CERN Computer Lab.

  2. Focus of this Presentation • CMS MC Data Production • Data Production Requirements • Data Storage / Data Transfer Requirements • A Solution: A Beowulf / Linux PC Cluster(H/W & S/W) • Our Current Status • The Team

  3. CMS MC Data Production • Phase I: Simulation • GEANT3 (FORTRAN) / GEANT4 (C++) • CMSIM • Phase II: ORCA Framework • Data Digitization • Object Database (Objectivity) • Distributed Object Databases (Federation)

  4. Data Production Requirements • On a P-III @ 650 MHz • 1 event  ~1 Mbyte of raw data  ~105 sec, and • ~800-1K events  0.8-1.0 Gbytes of raw data  in ONE day, and • On 10-12 P-IIIs @ 650 MHz • 10K events  10 Gbytes of raw data  in ONE day.

  5. Data Storage / Data Transfer Requirements • A Data Server Having: • large disk storage • high capacity Tape Drive support • Bandwidth of: • 256 Kbps  ~90 Mbytes / hour  ~2 Gbytes / day • 2 Mbps  ~720 Mbytes / hour  ~17 Gbytes / day

  6. A Solution: A Beowulf / Linux PC Cluster (H/W) • 12 P-IIIs @ 667 MHz having: • 15 GB of HDD & Onboard 3Com 3C59x NIC • A Network: • initially 24-port hub/switch • later Giga bit Switch ?? • A Data Server • ~200 GB HDD & 18 GB Tape Cartridges

  7. A Solution: A Beowulf / Linux PC Cluster (S/W) • Linux Redhat 6.1 • CERN and CMS specific Software and Libraries • Beowulf related Linux Kernel patches • Load sharing / monitoring Software • Batch Job Submission / Management Software

  8. Current Status • Started last Wednesday at CTC-CERN Computer Lab. • 5 P-IIIs are networked via 8-port hub • Linux Redhat 6.1 • CMSIM Environment setup • CMSIM compiled and running • Plans: All 12 PCs - Work on ORCA - Work on Beowulf

  9. The Team • A Combination of youth and experience • The members are: • Mr. Gufam Khan (Physics & MC) • Mr. Kamran Ashraf (System Admin & Development) • Mr. Suhail Basit (Hardware & C/C++ programming) • Mr. Muhammad Munir Ahmed (Networking & Sys Admin) • Shams Shahid Ayub

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