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Date: Thu, 2 Jan 2014 21:15:53 +0000 (UTC)
From: "Suresh Srinivas (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12680353.1384975201906.33492.1388697353148@arcas>
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Subject: [jira] [Updated] (HDFS-5535) Umbrella jira for improved HDFS
 rolling upgrades
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     [ https://issues.apache.org/jira/browse/HDFS-5535?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Suresh Srinivas updated HDFS-5535:
----------------------------------

    Attachment: HDFSRollingUpgradesHighLevelDesign.pdf

Here is a high level design document that [~kihwal], [~nroberts], [~sanjay.radia] and [~szetszwo] collaborated on.

> 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
>
>
> 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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