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https://issues.apache.org/jira/browse/HDFS-5535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13926297#comment-13926297
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Tsz Wo Nicholas Sze commented on HDFS-5535:
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> ... I assume CHANGES.txt will be manually merged and CHANGES_HDFS-5535.txt
> be removed.
Yes, I will update CHANGES.txt as well as editsStored manually.
Will merge it shortly.
> Umbrella jira for improved HDFS rolling upgrades
> ------------------------------------------------
>
> Key: HDFS-5535
> URL: https://issues.apache.org/jira/browse/HDFS-5535
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: datanode, ha, hdfs-client, namenode
> Affects Versions: 3.0.0, 2.2.0
> Reporter: Nathan Roberts
> Attachments: HDFSRollingUpgradesHighLevelDesign.pdf,
> HDFSRollingUpgradesHighLevelDesign.v2.pdf,
> HDFSRollingUpgradesHighLevelDesign.v3.pdf, h5535_20140219.patch,
> h5535_20140220-1554.patch, h5535_20140220b.patch, h5535_20140221-2031.patch,
> h5535_20140224-1931.patch, h5535_20140225-1225.patch,
> h5535_20140226-1328.patch, h5535_20140226-1911.patch,
> h5535_20140227-1239.patch, h5535_20140228-1714.patch,
> h5535_20140304-1138.patch, h5535_20140304-branch-2.patch,
> h5535_20140310-branch-2.patch, hdfs-5535-test-plan.pdf
>
>
> In order to roll a new HDFS release through a large cluster quickly and
> safely, a few enhancements are needed in HDFS. An initial High level design
> document will be attached to this jira, and sub-jiras will itemize the
> individual tasks.
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