Github user tillrohrmann commented on the pull request:
https://github.com/apache/flink/pull/1988#issuecomment-219082963
No I haven't run performance benchmarks, yet. Should definitely do that as
a follow-up.
You're right that the behaviour of RocksDB is interesting in particular. It
might make sense for the future to implement a RocksDB specialised
`KeyGroupStateBackend` implementation, which uses only a single RocksDB
instance for all key groups.
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