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From "Stefan Richter (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-9702) Improvement in (de)serialization of keys and values for RocksDB state
Date Mon, 02 Jul 2018 11:25:00 GMT
Stefan Richter created FLINK-9702:
-------------------------------------

             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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