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  1. Core Server
  2. SERVER-52588

Making the upgrade/downgrade process work for the Epoch to ClusterTime migration

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    • Fully Compatible
    • Sharding 2020-11-16, Sharding 2020-11-30, Sharding 2020-12-14

    Description

      The goal of this task is to define and implement the downgrade/upgrade process that transforms database/chunk versions that work with epochs into versions that work with ClusterTime and viceversa.

       

      On downgrade from 5.0 to 4.4, the timestamp field of DatabaseType, CollectionType and ShardCollectionType will need to be deleted.

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            jordi.serra-torrens@mongodb.com Jordi Serra Torrens
            sergi.mateo-bellido@mongodb.com Sergi Mateo Bellido
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