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https://issues.apache.org/jira/browse/HDFS-4749?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz Wo (Nicholas), SZE updated HDFS-4749:
-----------------------------------------

     Component/s:     (was: datanode)
    Hadoop Flags: Reviewed

+1 patch looks good.  This cleans up a lot of code.
                
> Use INodeId to identify the corresponding directory node for FSImage 
> saving/loading
> -----------------------------------------------------------------------------------
>
>                 Key: HDFS-4749
>                 URL: https://issues.apache.org/jira/browse/HDFS-4749
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>            Reporter: Jing Zhao
>            Assignee: Jing Zhao
>         Attachments: HDFS-4749.000.patch
>
>
> Currently in fsimage, we use the path to locate a directory node for later 
> loading, i.e., when loading a subtree from fsimage, we first read the path of 
> the directory node, and resolve the path to identify the directory node. This 
> brings extra complexity since we need to generate path for directory nodes in 
> both the current tree and snapshot copies.
> As a simplification, we can use INodeId to identify the directory node.

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