Stefan Richter created FLINK-9702:
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Summary: Improvement in (de)serialization of keys and values for RocksDB state
Key: FLINK-9702
URL: https://issues.apache.org/jira/browse/FLINK-9702
Project: Flink
Issue Type: Improvement
Components: State Backends, Checkpointing
Affects Versions: 1.6.0
Reporter: Stefan Richter
When Flink interacts with state in RocksDB, object (de)serialization often contributes significantly
to performance overhead. I think there are some aspects that we can improve here to reduce
the costs in this area. In particular, currently every state has to serialize the backen's
current key before each state access. We could reduce this effort by sharing serialized key
bytes across all state interactions. Furthermore, we can reduce the amount of `byte[]` and
stream/view that are involved.
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