Patrik Kleindl created KAFKA-8023:
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Summary: 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
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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