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Posted to common-issues@hadoop.apache.org by "Arun C Murthy (JIRA)" <ji...@apache.org> on 2012/10/11 19:45:48 UTC
[jira] [Closed] (HADOOP-7754) Expose file descriptors from
Hadoop-wrapped local FileSystems
[ https://issues.apache.org/jira/browse/HADOOP-7754?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Arun C Murthy closed HADOOP-7754.
---------------------------------
> 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
> Fix For: 1.2.0, 2.0.2-alpha
>
> 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, HADOOP-7754_trunk_rev4.patch, hasfd.txt, test-patch-hadoop-7754.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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