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https://issues.apache.org/jira/browse/HDFS-14162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16947883#comment-16947883
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Erik Krogen commented on HDFS-14162:
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Attached v005 patch fixing the 1 checkstyle warning and adding some default
implementation methods where necessary. I checked the production
implementations of the interface but forgot the anonymous implementations in
tests.
> Balancer should work with ObserverNode
> --------------------------------------
>
> Key: HDFS-14162
> URL: https://issues.apache.org/jira/browse/HDFS-14162
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Konstantin Shvachko
> Assignee: Erik Krogen
> Priority: Major
> Fix For: 3.3.0, 3.1.4, 3.2.2
>
> Attachments: HDFS-14162-HDFS-12943.wip0.patch,
> HDFS-14162-branch-2.004.patch, HDFS-14162-branch-2.005.patch,
> HDFS-14162.000.patch, HDFS-14162.001.patch, HDFS-14162.002.patch,
> HDFS-14162.003.patch, HDFS-14162.004.patch, ReflectionBenchmark.java,
> testBalancerWithObserver-3.patch, testBalancerWithObserver.patch
>
>
> Balancer provides a substantial RPC load on NameNode. It would be good to
> divert Balancer RPCs {{getBlocks()}}, etc. to ObserverNode. The main problem
> is that Balancer uses {{NamenodeProtocol}}, while ORPP currently supports
> only {{ClientProtocol}}.
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