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Type: Task
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Resolution: Fixed
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Priority: Major - P3
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Affects Version/s: None
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Component/s: Sharding
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Fully Compatible
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Sharding 2020-11-16, Sharding 2020-11-30, Sharding 2020-12-14
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.