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https://issues.apache.org/jira/browse/KAFKA-20999?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias J. Sax reassigned KAFKA-20999:
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Assignee: Ziyun Fu
> Add rack-aware standby task assignment
> --------------------------------------
>
> Key: KAFKA-20999
> URL: https://issues.apache.org/jira/browse/KAFKA-20999
> Project: Kafka
> Issue Type: Sub-task
> Components: group-coordinator, streams
> Reporter: Matthias J. Sax
> Assignee: Ziyun Fu
> Priority: Major
>
> In the "classic" protocol, there is "sticky" and "ha_assignor" options, and
> KIP-1071 defines both assignor options, too. The "sticky" assignor is already
> available, while the "ha_assignor" is missing.
> However, KIP-1071 introduced a different architecture and the class
> HA-assignor features are not delivered in the same way, instead, "warmup
> tasks" are injected via a new refiner step, and the HA-assignor does not need
> to concern itself with it.
> The HA-assignor also computes a different assignment compare to "sticky",
> which we are tracking via it's own sub-task.
> This ticket is about adding rack-aware standby task assignment, to make
> KIP-1017 feature complete with the classic HA-assignor (note, that the
> classic sticky assignor does not implement rack-aware standby task
> assignment). To this end, we want to not only close this "ha" feature gap,
> but implement rack-aware standby task assignment for both "sticky" and
> "balance" assignor.
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