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https://issues.apache.org/jira/browse/SPARK-34198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17284479#comment-17284479
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Reynold Xin commented on SPARK-34198:
-------------------------------------

I don't know the intricate details of it but I suspect it's a different one 
because it existed long before those two.

> 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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