skonto edited a comment on issue #24922: [SPARK-28120][SS] Rocksdb state storage implementation URL: https://github.com/apache/spark/pull/24922#issuecomment-543634413 @marmbrus @itsvikramagr Flink has supported this at the right level for them (https://github.com/apache/flink/tree/master/flink-state-backends). These backends dont change much and the benefits of using RockDB with checkpointing for large states are important, at least for Flink which emphasizes on stateful apps a lot. There is always a trade-off anyway. Having apis is the way to go for many parts but also some default, reference implementation is helpful especially if it makes a difference. Packages outside of the core project could become outdated fast I am afraid.
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