[jira] [Commented] (HDFS-13522) RBF: Support observer node from Router-Based Federation

["Ayush Saxena (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-13522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17561898#comment-17561898 ] 

Ayush Saxena commented on HDFS-13522:
-------------------------------------

Seems now we are going to have a third solution for this problem, Huawei has one, Uber has a different one and now this third one..
Do we have a design doc of what is planned, I see a PR, which mentions some other PRs, so good if we have a writeup which tells what is the final solution here..

> RBF: Support observer node from Router-Based Federation
> -------------------------------------------------------
>
>                 Key: HDFS-13522
>                 URL: https://issues.apache.org/jira/browse/HDFS-13522
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: federation, namenode
>            Reporter: Erik Krogen
>            Assignee: Simbarashe Dzinamarira
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: HDFS-13522.001.patch, HDFS-13522.002.patch, HDFS-13522_WIP.patch, RBF_ Observer support.pdf, Router+Observer RPC clogging.png, ShortTerm-Routers+Observer.png
>
>          Time Spent: 16h 20m
>  Remaining Estimate: 0h
>
> Changes will need to occur to the router to support the new observer node.
> One such change will be to make the router understand the observer state, e.g. {{FederationNamenodeServiceState}}.



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