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  1. Core Server
  2. SERVER-7656

Optimize aggregation on sharded setup if first stage is exact match on shard key

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Details

    • Improvement
    • Status: Closed
    • Major - P3
    • Resolution: Done
    • None
    • 3.0.9, 3.1.4
    • Aggregation Framework
    • None
    • Fully Compatible
    • Quint Iteration 3, Quint Iteration 4

    Description

      If only one shard is involved in an aggregate operation, handle this like an aggregation on non-sharded setups.

      This will improve performance and reduce memory and network activity for many sharded setups, where the shardkey is for example the userId.

      Attachments

        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-18940 Optimise sharded aggregations that are targeted to a single shard

          • Major - P3 - Major loss of function.
          • Closed
          related to

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-18444 Improve explain output of aggregation command in sharded cluster

          • Major - P3 - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-23330 Optimize aggregation on sharded setup if first stage is exact match on shard key with $in

          • Major - P3 - Major loss of function.
          • Closed

          Activity

            People

              charlie.swanson@mongodb.com Charlie Swanson
              notz Gernot Pansy
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              Dates

                Created:
                Updated:
                Resolved: