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https://issues.apache.org/jira/browse/HDFS-14710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16904079#comment-16904079
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Íñigo Goiri commented on HDFS-14710:
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Thanks [~xuzq_zander] for working on this.
* We should create an invokeSingle method that uses the block but also does the
casting (we have another invokeSingle that does it {{public <T> T
invokeSingle(final String nsId, RemoteMethod method, Class<T> clazz)}}.
* We need some unit tests which ideally would check the number of calls to
asses the improvement.
> RBF: Improve some RPC performances
> ----------------------------------
>
> Key: HDFS-14710
> URL: https://issues.apache.org/jira/browse/HDFS-14710
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: rbf
> Reporter: xuzq
> Assignee: xuzq
> Priority: Minor
> Attachments: HDFS-14710-trunk-001.patch
>
>
> We can improve some RPC performance if the extendedBlock is not null.
> Such as addBlock, getAdditionalDatanode and complete.
> Since HDFS encourages user to write large files, so the extendedBlock is not
> null in most case.
> In the scenario of Multiple Destination and large file, the effect is more
> obvious.
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