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https://issues.apache.org/jira/browse/IGNITE-13050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17120811#comment-17120811
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Ilya Kasnacheev commented on IGNITE-13050:
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Thank you for this improvement, I have merged it to master!
> ClusterGroup that is recomputed on topology change
> --------------------------------------------------
>
> Key: IGNITE-13050
> URL: https://issues.apache.org/jira/browse/IGNITE-13050
> Project: Ignite
> Issue Type: Improvement
> Components: compute
> Reporter: Ivan Bessonov
> Assignee: Ivan Bessonov
> Priority: Major
> Fix For: 2.9
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Currently, ClusterGroup comes in two favors:
> One is a static set of UUIDs which will not change, second is predicate that
> is recomputed over ALL nodes on EVERY operation. This has bitten our client
> because recomputing of ClusterGroup happens in tcp-communication thread
> clogging it and delaying every operation in cluster. This is a major problem.
> It would be nice if there was a ClusterGroup with predicate which would
> recompute once per topology affinity change. Bonus points if it precisely
> tracks current topology with zero delay or overrun.
> Would be nice to upgrade firstNode/lastNode predicates to that mechanism
> since now they are static - topology changes but firstNode/lastNode
> projections don't, they may point to absent node.
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