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