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CDF Analysis Diskpool Status

This report presents an extensive analysis of the diskpool status, focusing on various testing methodologies including billing and door database evaluations, system performance tests, and hardware assessments with borrowed CMS equipment. Key findings include user profiles showcasing the most prolific readers and writers, along with detailed performance metrics of file servers and PNFS databases. Future plans involve finishing user case profiles, hardware testing, and preparing for a formal pre-production readiness review scheduled for the week of May 15th.

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CDF Analysis Diskpool Status

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  1. CDF Analysis Diskpool Status • Use Case analysis • Analysis of Billing and door DB’s • System tests • fileserver rate tests • Pnfs database rate tests • New hardware (CMS Sataboy on loan) • Plans Doug Benjamin and Dave Ambrose with help from Alexei Varganov

  2. Daily diskpool usage D. Ambrose CDF Analysis diskpool status - D Benjamin

  3. jobs by user (Total/write/read) D. Ambrose CDF Analysis diskpool status - D Benjamin

  4. Example user profile • Most prolific user • Reading only • ntuples D Ambrose CDF Analysis diskpool status - D Benjamin

  5. Example user profile • Most prolific writer • Writing ntuples • Reading ntuples D Ambrose CDF Analysis diskpool status - D Benjamin

  6. System testing • Fileserver read performance • By server • Agregate rate • PNFS database performance testing • Initial results “interesting” • More work needed to understand the results A Varganov CDF Analysis diskpool status - D Benjamin

  7. 120 MB/s Various fileservers 0 MB/s 120 MB/s 0 MB/s D Ambrose 30 jobs 100 jobs A Varganov CDF Analysis diskpool status - D Benjamin

  8. Plans/Conclusions • Finish User use case profiles in 1-2 weeks (including interviews) • Finish hardware testing 1-2 weeks • Including borrowed CMS hardware • Summarize results • Plan for first formal preproduction readiness review week of 15-May CDF Analysis diskpool status - D Benjamin

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