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From Íñigo Goiri (JIRA) <j...@apache.org>
Subject [jira] [Commented] (HDFS-12976) Introduce StandbyReadProxyProvider
Date Wed, 03 Jan 2018 21:36:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16310316#comment-16310316
] 

Íñigo Goiri commented on HDFS-12976:
------------------------------------

Any consideration on using the hedged approach?
In HDFS-6648, I added the ability to make the access to the NNs in a random order too.

In addition, the Router-based federation, remembers the state of the Namenodes and issues
the requests to the active one.
Once this is done, I should add an option to mimic the behavior you are describing and send
the READ requests to the standby namenodes.

> Introduce StandbyReadProxyProvider
> ----------------------------------
>
>                 Key: HDFS-12976
>                 URL: https://issues.apache.org/jira/browse/HDFS-12976
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs-client
>            Reporter: Konstantin Shvachko
>
> {{StandbyReadProxyProvider}} should implement {{FailoverProxyProvider}} interface and
be able to submit read requests to ANN and SBN(s).



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