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  1. Core Server
  2. SERVER-32994

Create a script to rebuild unique indexes in right format after a downgrade

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    • Backwards Compatibility:
      Fully Compatible
    • Backport Requested:
      v4.0
    • Sprint:
      Storage Non-NYC 2018-04-09, Storage Engines 2018-07-30, Storage Engines 2018-08-13

      Description

      When a MongoDB 4.2 database is downgraded to FCV=4.0, the existing unique indexes in data format 11 and 12 should continue to operate in this format. Create a script that users can run that will identify and rebuild all of these indexes in the older format of 6 and 8.

      Coordinate with docs team regarding publishing of this script.

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