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  1. Jackrabbit Oak
  2. OAK-2106

Optimize reads from secondaries

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Duplicate
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: core, mongomk

      Description

      OAK-1645 introduced support for reads from secondaries under certain
      conditions. The current implementation checks the _lastRev on a potentially
      cached parent document and reads from a secondary if it has not been
      modified in the last 6 hours. This timespan is somewhat arbitrary but
      reflects the assumption that the replication lag of a secondary shouldn't
      be more than 6 hours.

      This logic should be optimized to take the actual replication lag into
      account. MongoDB provides information about the replication lag with
      the command rs.status().

        Attachments

        1. OAK-2106.patch
          45 kB
          Tomek Rękawek

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              • Assignee:
                tomek.rekawek Tomek Rękawek
                Reporter:
                mreutegg Marcel Reutegger
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                Dates

                • Created:
                  Updated:
                  Resolved: