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Posted to yarn-dev@hadoop.apache.org by "zhihai xu (JIRA)" <ji...@apache.org> on 2015/04/27 21:06:38 UTC

[jira] [Created] (YARN-3549) use JNI-based FileStatus implementation from io.nativeio.NativeIO.POSIX#getFstat instead of shell-based implementation from RawLocalFileSystem in checkLocalDir.

zhihai xu created YARN-3549:
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             Summary: use JNI-based FileStatus implementation from io.nativeio.NativeIO.POSIX#getFstat instead of shell-based implementation from RawLocalFileSystem in checkLocalDir.
                 Key: YARN-3549
                 URL: https://issues.apache.org/jira/browse/YARN-3549
             Project: Hadoop YARN
          Issue Type: Bug
          Components: nodemanager
            Reporter: zhihai xu
            Assignee: zhihai xu


Use JNI-based FileStatus implementation from io.nativeio.NativeIO.POSIX#getFstat instead of shell-based implementation from RawLocalFileSystem in checkLocalDir.
As discussed in YARN-3491, shell-based implementation getPermission runs shell command "ls -ld" to get permission, which take 4 or 5 ms.
We should switch to io.nativeio.NativeIO.POSIX#getFstat as implementation in RawLocalFileSystem to get rid of shell-based implementation for FileStatus.



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