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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10745) Directly resolve paths into INodesInPath
Date Tue, 04 Oct 2016 00:35:20 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10745?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15543886#comment-15543886
] 

Konstantin Shvachko commented on HDFS-10745:
--------------------------------------------

The port to 2.7 looks good. There are two more places where the optimization can be applied:
- {{FSNamesystem.checkAccess()}}
- {{FSDirAttrOp.setStoragePolicy()}}

> Directly resolve paths into INodesInPath
> ----------------------------------------
>
>                 Key: HDFS-10745
>                 URL: https://issues.apache.org/jira/browse/HDFS-10745
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>             Fix For: 2.8.0, 3.0.0-alpha1
>
>         Attachments: HDFS-10745-branch-2.7.01.patch, HDFS-10745-branch-2.7.02.patch,
HDFS-10745-branch-2.7.03.patch, HDFS-10745-branch-2.7.04.patch, HDFS-10745-branch-2.7.patch,
HDFS-10745.2.patch, HDFS-10745.branch-2.patch, HDFS-10745.patch
>
>
> The intermediate resolution to a string, only to be decomposed by {{INodesInPath}} back
into a byte[][] can be eliminated by resolving directly to an IIP.  The IIP will contain the
resolved path if required.



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