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https://issues.apache.org/jira/browse/HDFS-8598?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14606174#comment-14606174
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Andrew Wang commented on HDFS-8598:
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Hi Yong, I'm -1 on adding this unless it's a measurable difference for some
workload, since as I said above big listings really impact the NN. That we have
such an API for FileStatus is a relic of the past.
> Add and optimize for get LocatedFileStatus in DFSClient
> --------------------------------------------------------
>
> Key: HDFS-8598
> URL: https://issues.apache.org/jira/browse/HDFS-8598
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Yong Zhang
> Assignee: Yong Zhang
> Attachments: HDFS-8598.001.patch, HDFS-8598.002.patch
>
>
> If we want to get all files block locations in one directory, we have to call
> getFileBlockLocations for each file, it will take long time because of too
> many request.
> LocatedFileStatus has block location, but we can find it also call
> getFileBlockLocations for each file in DFSClient. this jira is trying to
> optimize with only one RPC.
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