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https://issues.apache.org/jira/browse/HADOOP-1779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12523766
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dhruba borthakur commented on HADOOP-1779:
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This patch should be committed, because it eliminates the need for a "parent"
pointer from each INode. This saves precious memory in the namenode.
I will reserve my comments about not having access checks along all components
of a path lookup for HADOOP-1298.
+1 for this patch.
> Small INodeDirectory enhancement to get all existing INodes components on a
> path
> --------------------------------------------------------------------------------
>
> Key: HADOOP-1779
> URL: https://issues.apache.org/jira/browse/HADOOP-1779
> Project: Hadoop
> Issue Type: Improvement
> Components: dfs
> Reporter: Christophe Taton
> Assignee: Christophe Taton
> Priority: Trivial
> Fix For: 0.15.0
>
> Attachments: 1779_2007-08-27c.patch
>
>
> This patch introduces {{INode[] INodeDirectory.getExistingPathINodes(String
> path)}}, modeled over the existing {{getNode()}} / {{getINode()}}.
> The purpose of this is to provide a way to retrieve all existing INodes in a
> path in a single tree scan.
> This to allow fast INode's permission (see
> [HADOOP-1298|https://issues.apache.org/jira/browse/HADOOP-1298]) checking
> along the path, and without requiring the {{INode.parent}} field which could
> be removed (see
> [HADOOP-1687|https://issues.apache.org/jira/browse/HADOOP-1687]).
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