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  1. HPCC
  2. HPCC-22802

Avoid remote streaming if counterproductive

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 7.6.0
    • Component/s: Thor
    • Labels:
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      Description

      In some circumstances, it is much more inefficient to connect to dafilesrv to get a row stream.
      The case seen recently was where all Thor slaves connected to the same dafilesrv for an index read of a relatively small 1-way index, inside a child query.

      When remote streaming is disabled, the small 1-way index fits into the jhtree cache, so is effectively read once on all thor slaves, and is therefore much quicker.

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            • Assignee:
              jakesmith Jake Smith
              Reporter:
              jakesmith Jake Smith
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