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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