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https://issues.apache.org/jira/browse/HADOOP-7754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13433783#comment-13433783
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Ahmed Radwan commented on HADOOP-7754:
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I have tried the four tests reports by Jenkins above:
org.apache.hadoop.fs.TestS3_LocalFileContextURI
org.apache.hadoop.fs.s3native.TestInMemoryNativeS3FileSystemContract
org.apache.hadoop.fs.TestLocal_S3FileContextURI
org.apache.hadoop.fs.s3.TestInMemoryS3FileSystemContract
All of them run successfully on my local machine.
> Expose file descriptors from Hadoop-wrapped local FileSystems
> -------------------------------------------------------------
>
> Key: HADOOP-7754
> URL: https://issues.apache.org/jira/browse/HADOOP-7754
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: native, performance
> Affects Versions: 0.23.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Attachments: hadoop-7754-0.23.0-hasfd.txt,
> HADOOP-7754_branch-1_rev2.patch, HADOOP-7754_branch-1_rev3.patch,
> HADOOP-7754_branch-1_rev4.patch, HADOOP-7754_trunk.patch,
> HADOOP-7754_trunk_rev2.patch, HADOOP-7754_trunk_rev2.patch,
> HADOOP-7754_trunk_rev3.patch, HADOOP-7754_trunk_rev4.patch,
> HADOOP-7754_trunk_rev4.patch, hasfd.txt
>
>
> In HADOOP-7714, we determined that using fadvise inside of the MapReduce
> shuffle can yield very good performance improvements. But many parts of the
> shuffle are FileSystem-agnostic and thus operate on FSDataInputStreams and
> RawLocalFileSystems. This JIRA is to figure out how to allow
> RawLocalFileSystem to expose its FileDescriptor object without unnecessarily
> polluting the public APIs.
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