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https://issues.apache.org/jira/browse/FLINK-25262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17458120#comment-17458120
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Yuan Zhu commented on FLINK-25262:
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I think this was proposed before.
> Support to send data to lookup table for KeyGroupStreamPartitioner way for
> SQL
> -------------------------------------------------------------------------------
>
> Key: FLINK-25262
> URL: https://issues.apache.org/jira/browse/FLINK-25262
> Project: Flink
> Issue Type: Improvement
> Reporter: hehuiyuan
> Priority: Minor
> Attachments: image-2021-12-12-15-15-48-540.png,
> image-2021-12-12-15-18-08-574.png
>
>
> Send data to lookup table by hash , which can improve cache hit rate in
> lookup table, futher improve processing performance and reduce the size of
> cache.
>
> Shoulder we consider to introducing it?
>
>
> !image-2021-12-12-15-18-08-574.png|width=419,height=193!
>
> I have a simple test. The parallelism is 10 and the kafka source has 100
> million records and the hbase lookuptable has 100 thousands records. It need
> 100 minutes for forward and 5 minutes for hash.
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