Uploaded image for project: 'Core Server'
  1. Core Server
  2. SERVER-39270

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

    • Type: Icon: Improvement Improvement
    • Resolution: Fixed
    • Priority: Icon: Major - P3 Major - P3
    • 5.1.0-rc0
    • Affects Version/s: None
    • Component/s: Querying
    • None
    • Fully Compatible
    • Query Optimization 2021-06-14, Query Optimization 2021-06-28, Query Optimization 2021-07-12

      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.

            Assignee:
            katherine.wu@mongodb.com Katherine Wu (Inactive)
            Reporter:
            ian.boros@mongodb.com Ian Boros
            Votes:
            0 Vote for this issue
            Watchers:
            4 Start watching this issue

              Created:
              Updated:
              Resolved: