Tzu-Li (Gordon) Tai created FLINK-12047:
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Summary: Savepoint connector to read / write / process savepoints
Key: FLINK-12047
URL: https://issues.apache.org/jira/browse/FLINK-12047
Project: Flink
Issue Type: New Feature
Components: Runtime / State Backends
Reporter: Tzu-Li (Gordon) Tai
This JIRA tracks the ongoing efforts and discussions about a means to read /
write / process state in savepoints.
There are already two known existing works (that was mentioned already in the
mailing lists) related to this:
1. Bravo [1]
2. https://github.com/sjwiesman/flink/tree/savepoint-connector
Essentially, the two tools both provide a connector to read or write a Flink
savepoint, and allows to utilize Flink's processing APIs for querying /
processing the state in the savepoint.
We should try to converge the efforts on this, and have a savepoint connector
like this in Flink.
With this connector, the high-level benefits users should be able to achieve
with it are:
1. Create savepoints using existing data from other systems (i.e. bootstrapping
a Flink job's state with data in an external database).
2. Derive new state using existing state
3. Query state in savepoints, for example for debugging purposes
4. Migrate schema of state in savepoints offline, compared to the current more
limited approach of online migration on state access.
5. Change max parallelism of jobs.
[1] https://github.com/king/bravo
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