Difference: DataTransferLatency (35 vs. 36)

Revision 362007/10/24 - Main.FkW

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    • Sample requested by Purdue from CERN but Purdue does not have a commissioned link from CERN. This is another peer-to-peer experiment in a relayed data transfer. We will record how long it takes to download from CERN but also to pass on to Purdue.
    • First file downloaded to UCSD at 2007-10-17 09:43:25 PDT, over 8h after the dataset was requested. File is also copied to Purdue already (before 11:13am).
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  • /W0jet-alpgen/CMSSW_1_5_2-CSA07-2203/GEN-SIM-DIGI-RECO
    w0jet.png w0jet-detail.png
    • The transfer of this dataset was very varied. We believe this is in part due to the CSA07 processing and skimming activities which put a lot of load on both CERN and FNAL.
    • In addition, we got stuck on October 21st with 5 files left to transfer. All 5 supposedly existed at CERN and FNAL.
      • The detailed plot shows clearly that nothing moved despite the 5 missing files.
      • By October 24th, only one of the 5 files has moved to UCSD, i.e. still 4 files missing. At this point we are asking phedex ops for help.
 

History of Commissioned Downlinks to UCSD (beginning 04 October 2007)

  • 04 Oct 2007 - Commissioned downlinks are available from T1_ASGC and T1_FNAL (as well as from T2 sites at T2_Caltech, T2_Purdue and T2_Estonia)
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