I have a usecase where I need to seed a Flink Application(both RocksDB state and Broadcast State) using Bounded S3 sources and then read other unbounded/bounded S3 sources after the seeding is complete.
I was trying to achieve this in 2 steps:

1. Seeding: Trigger a Flink job with only the seeding data bounded source and take a savepoint after the job finishes.
2. Regular Processing: Restore from seeded savepoint on a new Flink graph to process other unbounded/bounded S3 sources.
   Questions:
3. For Step 1: Does Flink support taking savepoints automatically after Job Finishes in Streaming Mode.
4. If only manual savepoint trigger is supported, what can be used a done signal that all the seeding data is processed completely and all the task are finished processing?
   Any other approaches to achieve the seeding usecase is appreciated as well. Note: Approaches where we buffer the regular data until seeding data is processed is not feasible for my usecase
   Thanks