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Overview of 2012 Run Computing Requests

Review of computing needs for 2012 technical runs including LKr readout rates, data storage requirements, and missing infrastructure. Limited fiber availability challenges. Software, buffer, and reconstruction status discussed.

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Overview of 2012 Run Computing Requests

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  1. “Computing requests for Dry/Technical Runs” GianlucaLamanna (CERN) 23.05.2012 Computing WG

  2. Overview of 2012 runs TDAQ hardware

  3. Bandwidth and space for 2012 • The LKr is the main data source • The maximum readout rate, for the LKr, is 10 kHz. In case of higher rates the LKr readout will be downscaled, but still it dominates. • 5000 cells x 8 samples x 12 b = 480 kb/event  600 MB/s (@10 kHz) • Duty cycle factor 0.25  125 MB/s (w/o zero suppression) • Assuming 3 weeks of data taking  order of 100 TB disk space required

  4. Other stuffs… • CDR • the 10 Gb/s fiber will be not ready for the dry run, still isn’t clear if the 1 Gb/s is still available. • 2 missed pieces: from PC room to starpoint, from 918 to the previous building. Probably will be ready for TR (Collignon is worrying of that). • One person should be identified to follow the software (learn scripts) part • Buffer: for the TR we need 50h of buffer (disk server mounted in NFS for this year, increase the quantity of disk in the readout PC,…) • Reconstruction and event display: • something is ready in the NA62 framework, but some pieces of decoding and digitization is missing

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