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  1. Core Server
  2. SERVER-39270

Allow top-level $lookup stages to run in parallel on multiple shards

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Details

    • Icon: Improvement Improvement
    • Resolution: Fixed
    • Icon: Major - P3 Major - P3
    • 5.1.0-rc0
    • None
    • Querying
    • None
    • Fully Compatible
    • Query Optimization 2021-06-14, Query Optimization 2021-06-28, Query Optimization 2021-07-12

    Description

      This will involve changing the 'distributedPlanLogic()' for DocumentSourceLookup. Note that only top-level $lookups should be allowed to run in parallel, and any nested $lookup stages in the pipeline should remain on the "merging" half of the pipeline and be run serially.

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            katherine.wu@mongodb.com Katherine Wu (Inactive)
            ian.boros@mongodb.com Ian Boros
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              Created:
              Updated:
              Resolved: