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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

    • Type: Improvement
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 3.0.9, 3.1.4
    • Component/s: Aggregation Framework
    • Labels:
      None
    • Backwards Compatibility:
      Fully Compatible
    • Backport Completed:
    • Sprint:
      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.

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              Assignee:
              charlie.swanson Charlie Swanson
              Reporter:
              notz Gernot Pansy
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