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https://issues.apache.org/jira/browse/KAFKA-8023?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Guozhang Wang updated KAFKA-8023:
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Labels: new-streams-runtime-should-fix performance (was: performance)
> Improve global state store restoration by using multiple update threads
> -----------------------------------------------------------------------
>
> Key: KAFKA-8023
> URL: https://issues.apache.org/jira/browse/KAFKA-8023
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Reporter: Patrik Kleindl
> Priority: Major
> Labels: new-streams-runtime-should-fix, performance
>
> Currently global state stores are restored sequentially and the partitions of
> each global state store are restored sequentially too.
> Loop over stores:
> https://github.com/apache/kafka/blob/b03e8c234a8aeecd10c2c96b683cfb39b24b548a/streams/src/main/java/org/apache/kafka/streams/processor/internals/GlobalStateManagerImpl.java#L155
> Loop over partitions:
> https://github.com/apache/kafka/blob/b03e8c234a8aeecd10c2c96b683cfb39b24b548a/streams/src/main/java/org/apache/kafka/streams/processor/internals/GlobalStateManagerImpl.java#L256
> It would be a great improvement if one or both of those loops could be
> processed in parallel.
> Possible related task is https://issues.apache.org/jira/browse/KAFKA-6721
> Mail discussion:
> https://lists.apache.org/thread.html/6fc4772eb8635c04b0ee6682003a99a5ef37ebccffea6c89752e96b1@%3Cusers.kafka.apache.org%3E
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