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AMOD Report

This report summarizes the hourly jobs completed, notable activities, and other events related to DDM data flows at Duke University in the past week. Various issues and occurrences were addressed, including file losses, disk space additions, and tape drive problems. Conclusions express gratitude to experts, sites, and teams involved in resolving challenges faced during the period.

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AMOD Report

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  1. AMOD Report Doug Benjamin Duke University

  2. Hourly Jobs Completed during last week 50 K Red – Analysis Yellow – Production Blue - Test

  3. DDM data flows during last week 10 TB 0 TB

  4. Notable activities • Santa Claus stopped for CNAF on Monday • Difference between DQ2 datadisk and SRM used is overlapping files • No problems CNAF during the week – • Added disk space vital

  5. Other notable events • File loss at CASTOR due to race condition in code • Loss of 2 ESD files • Castor experts noted a bug and are fixing it • Files temporarily missing from CERN EOS due to glitch • Restored from 2nd copy within ATLAS • Aggressive of dq2-get from CERN caused transfer problems in and out of FKZ • User filled the transfer queues, Rod identified the nodes causing the problem and the user was notified • Need better mechanism for users • WN configuration problems (few nodes) ND and IT clouds

  6. Express Stream reprocessing • Express Stream Reprocessing started on Tuesday (AMOD forgot to report in WLCG meeting and was reminded ie Busted) • Persistent problems with Tapes at FZK caused delays in reprocessing and accessing MC Hits from tape • Problem with PIC tape drive – drive reset and firmware patch applied – no other problems seen. • Transient tape drive issues at IN2P3 and SARA • Santa Claus stopped for FZK DATATAPE at site request on Sunday.

  7. Conclusions • Thanks to the experts, sites, shifts (Comp@p1, ADCOS, ADCOS expert) • Express Stream reprocessing completed • Good Luck to FZK to solve their persistent tape problems

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