carp84 commented on issue #7674: [FLINK-10043] [State Backends] Refactor 
RocksDBKeyedStateBackend object construction/initialization/restore code
URL: https://github.com/apache/flink/pull/7674#issuecomment-466303453
 
 
   To convenient the review on compact filter registering part, let me clarify 
the current process after refactoring:
   - Incremental restore
     - restore with rescaling
       - init db from a certain sst: `createAndRegisterColumnFamilyDescriptors` 
when prepare files, before db open
       - data ingestion after db open: `getOrRegisterStateColumnFamilyHandle` 
before creating column family
     - restore without rescaling: `createAndRegisterColumnFamilyDescriptors` 
when prepare files, before db open
   - Full restore
     - data ingestion after db open: `getOrRegisterStateColumnFamilyHandle` 
before creating column family

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