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  1. Kudu
  2. KUDU-3248

Expose replica selection option that provides better affinity for remote scans

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.15.0
    • Component/s: client
    • Labels:
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      Description

      Kudu clients like Impala that use the CLOSEST_REPLICA selection option can suffer from bad tserver buffer cache warmup/locality during remote scans due to lack of tserver affinity as described in IMPALA-10481.

      The Kudu client should expose a replica selection option that provides better affinity when doing remote scans.   The comments in IMPALA-10481 suggest a new LOCAL_OR_LEADER option that would select a local replica if one exists, otherwise fallback to the leader.

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              • Assignee:
                granthenke Grant Henke
                Reporter:
                drorke David Rorke
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                • Created:
                  Updated:
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