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https://issues.apache.org/jira/browse/IGNITE-20373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17822099#comment-17822099
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Roman Puchkovskiy commented on IGNITE-20373:
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Stripization of the Inbound pool is split to IGNITE-21626.
Same for the Outbound thread: IGNITE-21627
> Fix IO threading model
> ----------------------
>
> Key: IGNITE-20373
> URL: https://issues.apache.org/jira/browse/IGNITE-20373
> Project: Ignite
> Issue Type: Improvement
> Affects Versions: 3.0
> Reporter: Alexey Scherbakov
> Assignee: Roman Puchkovskiy
> Priority: Major
> Labels: ignite-3, ignite3_performance, threading
> Fix For: 3.0.0-beta2
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> Currently IO is resubmitted to inboundExecutor for further processing (even
> there are corner cases then a message handler called in IO thread)
> It makes message processing essentially single threaded and introduces
> additional lag due to message transition to additional queue.
> addMessageHandler should be extended with a 3-d argument: a pool for
> submitting a callback for execution, or an executorSelector like in jraft.
> inboundExecutor should be changed to striped, use more than one thread, and
> serve messages without explicit executor. Delivery guaranties should be
> preserved: if a message A is send before B, B can't be processed on a
> receiver before A. A stripe is defined by sender-receiver pair (or can be
> user defined - TBD)
> outboundExecutor also looks like a contention point - need to be addressed as
> well
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