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Tzu-Li (Gordon) Tai edited comment on FLINK-11254 at 1/3/19 11:20 AM: ---------------------------------------------------------------------- Yes, we've discussed on this a bit offline. I'll be willing to shepherd this effort [~klion26]. Before anything else, to kick this off, it would be best if we can start with a document that first clarifies the format of each different backend / state structure. This is something that is already missing as of the current state - there is no clear documentation of the serialization formats of state backends. With this sorted out first, it'll then be easier to discuss towards a draft solution for the unified format and migration paths, which we can then propose to the community as a FLIP. was (Author: tzulitai): Yes, we've discussed on this a bit offline during Flink Forward. I'll be willing to shepherd this effort [~klion26]. Before anything else, to kick this off, it would be best if we can start with a document that first clarifies the format of each different backend / state structure. This is something that is already missing as of the current state - there is no clear documentation of the serialization formats of state backends. With this sorted out first, it'll then be easier to discuss towards a draft solution for the unified format and migration paths, which we can then propose to the community as a FLIP. > Unify serialization format of savepoint for switching state backends > -------------------------------------------------------------------- > > Key: FLINK-11254 > URL: https://issues.apache.org/jira/browse/FLINK-11254 > Project: Flink > Issue Type: Improvement > Affects Versions: 1.7.1 > Reporter: Congxian Qiu > Assignee: Congxian Qiu > Priority: Major > > For the current version, the serialization formats of savepoint between > HeapKeyedStateBackend and RocksDBStateBackend are different, so we can not > switch state backend when using savepoint. We should unify the serialization > formats of the savepoint to support state backend switch. -- This message was sent by Atlassian JIRA (v7.6.3#76005)