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https://issues.apache.org/jira/browse/SPARK-34198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17284381#comment-17284381
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L. C. Hsieh commented on SPARK-34198:
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I'd tend to take as the baseline from
[https://github.com/qubole/spark-state-store|https://github.com/qubole/spark-state-store,]
as we are experimenting it internally and seems we are not only one using it
based on previous comments, and yea I think it is basically from the previous
PR [https://github.com/apache/spark/pull/24922]. It looks newer than the first
one and has a better structure.
> Add RocksDB StateStore as external module
> -----------------------------------------
>
> Key: SPARK-34198
> URL: https://issues.apache.org/jira/browse/SPARK-34198
> Project: Spark
> Issue Type: New Feature
> Components: Structured Streaming
> Affects Versions: 3.2.0
> Reporter: L. C. Hsieh
> Assignee: L. C. Hsieh
> Priority: Major
>
> Currently Spark SS only has one built-in StateStore implementation
> HDFSBackedStateStore. Actually it uses in-memory map to store state rows. As
> there are more and more streaming applications, some of them requires to use
> large state in stateful operations such as streaming aggregation and join.
> Several other major streaming frameworks already use RocksDB for state
> management. So it is proven to be good choice for large state usage. But
> Spark SS still lacks of a built-in state store for the requirement.
> We would like to explore the possibility to add RocksDB-based StateStore into
> Spark SS. For the concern about adding RocksDB as a direct dependency, our
> plan is to add this StateStore as an external module first.
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