Tzu-Li (Gordon) Tai created FLINK-9574:

             Summary: Add a dedicated documentation page for state evolution
                 Key: FLINK-9574
             Project: Flink
          Issue Type: Improvement
          Components: Documentation, State Backends, Checkpointing, Type 
Serialization System
            Reporter: Tzu-Li (Gordon) Tai
            Assignee: Tzu-Li (Gordon) Tai

Currently, the only bit of documentation about serializer upgrades / state 
evolution, is 
 which only explains things at an API level.

State evolution over the time has proved to be a rather complex topic that is 
often overlooked by users. Users would probably benefit from a actual 
full-grown dedicated page that covers both API, and a some necessary internal 
details regarding the interplay of the outdated serializer, restore serializer, 
and new registered serializer of states.

I propose to add this documentation as a subpage under Streaming/State & 

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