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Posted to issues@ratis.apache.org by "Yaolong Liu (Jira)" <ji...@apache.org> on 2022/01/25 11:41:00 UTC

[jira] [Commented] (RATIS-1298) Support non-voting members (Listeners/Learners)

    [ https://issues.apache.org/jira/browse/RATIS-1298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17481756#comment-17481756 ] 

Yaolong Liu commented on RATIS-1298:
------------------------------------

[~szetszwo] hi , is anyone still doing raft listener related development work? If the listener can be used as a read-noly node, which can improve the read performance of the system in some scenarios, we may need this feature.

> Support non-voting members (Listeners/Learners)
> -----------------------------------------------
>
>                 Key: RATIS-1298
>                 URL: https://issues.apache.org/jira/browse/RATIS-1298
>             Project: Ratis
>          Issue Type: New Feature
>          Components: server
>            Reporter: Rui Wang
>            Assignee: Rui Wang
>            Priority: Major
>         Attachments: screenshot-1.png
>
>
> It's time to add the non-voting member, or leaner that is proposed in Raft thesis 4.2.1 (you can find a copy at [1]).
> The leaner is useful to maintain high availability when new servers join Raft ring (details at thesis 4.2.1). For Ozone SCM HA effort, we have also discussed the possibility to utilize leaner as the tool to replace SCM nodes online.
> [1]: https://github.com/ongardie/dissertation



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