Github user StefanRRichter commented on a diff in the pull request: https://github.com/apache/flink/pull/5582#discussion_r192018187 --- Diff: flink-state-backends/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/RocksDBKeySerializationUtils.java --- @@ -138,4 +138,12 @@ private static void writeVariableIntBytes( value >>>= 8; } while (value != 0); } + + public static byte[] serializeKeyGroup(int keyGroup, int keyGroupPrefixBytes) { + byte[] startKeyGroupPrefixBytes = new byte[keyGroupPrefixBytes]; --- End diff -- This is a very good question. But I think for as long as we consider rescaling incremental checkpoints itself as experimental, we can try to use the `deleteRange` and change it in case we experience any problems. Would that be ok?
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