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  1. Data Management
  2. DM-4617

Send all chunk-queries to primary copy of the chunk

    Details

    • Type: Story
    • Status: Done
    • Resolution: Done
    • Fix Version/s: None
    • Component/s: xrootd
    • Labels:
      None
    • Templates:
    • Story Points:
      5
    • Sprint:
      DB_W16_01, DB_W16_02
    • Team:
      Data Access and Database

      Description

      We are planning to distribute chunks / replicas across worker nodes such that each node will have a mix of primary copies for some chunks, and backup copies for some chunks. While doing shared scan, we are going to always rely on the primary chunks (e.g., all queries that need a given chunk should be sent to the same machine so that we read that chunks only once on one node). This story involves tweaking xrootd to ensure we don't send chunk-queries to nodes hosting non-primary copies.

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              • Assignee:
                abh Andy Hanushevsky
                Reporter:
                fritzm Fritz Mueller
                Watchers:
                Andy Hanushevsky, Jacek Becla, John Gates
              • Votes:
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                • Created:
                  Updated:
                  Resolved:

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