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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7498) Simplify the logic in INodesInPath
Date Tue, 09 Dec 2014 07:59:12 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7498?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jing Zhao updated HDFS-7498:
----------------------------
    Target Version/s: 2.7.0
              Status: Patch Available  (was: Open)

> Simplify the logic in INodesInPath
> ----------------------------------
>
>                 Key: HDFS-7498
>                 URL: https://issues.apache.org/jira/browse/HDFS-7498
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>            Reporter: Jing Zhao
>            Assignee: Jing Zhao
>         Attachments: HDFS-7498.000.patch
>
>
> Currently we have relatively complicated logic in INodesInPath:
> 1) It can contain null elements in its INode array, and in {{mkdirRecursively}} these
null INodes are replaced with new directories.
> 2) Operations like rename may also replace the inode in its INode array
> 3) {{getINodes}} requires trimming inodes array if the INodesInPath is derived from a
dot-snapshot path
> 4) A lot of methods directly use/manipulate its INode array
> We aim to simplify the logic of INodesInPath in this jira. Specifically, we can
> make INodesInPath an immutable data structure and move the inode trimming logic to path
resolving.



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