Atlas

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Bienvenue sur la page Atlas LCG-France
Welcome to the LCG-France Atlas page

DOMA_FR tests

  • Global transfers from/ to (same site dest/source site excluded)
Header text LAPP LPSC CC
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  • Data access monitorings per WN
Destination of access LAPP LPSC CC
Production download

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Production upload

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Production input

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Production output

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Analysis Download

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Analysis Direct Access

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  • Current conclusion
    • Enabling direct access creates much more network usage -> Is it usefull for ATLAS ? (processing urgent request faster ?)
    • Job brokering prefers direct access than Rucio/FTS transfer
    • 10 Gb/s connection LAPP-CC (used for all LAPP WAN transfers to any site) can get saturated if huge amount of jobs starting at same time (No smoothing by Panda)
  • Next steps
    • Deploy Rucio 1.17 to use protocol priority defined in AGIS (bug in 1.16). Solving bug : use most trusted protocol and would help to control srm decreasing usage
    • Monitor job efficiency vs RTT between SE and WN -> Identify when cache does not have impact (assuming no network bandwidth limitation)
    • Understand the ATLAS job brokering algorithm