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Date: Wed, 21 Aug 2013 14:11:52 +0000 (UTC)
From: "Ravi Prakash (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12550422.1334084033844.10008.1377094312857@arcas>
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Subject: [jira] [Updated] (HDFS-3245) Add metrics and web UI for cluster
 version summary
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     [ https://issues.apache.org/jira/browse/HDFS-3245?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ravi Prakash updated HDFS-3245:
-------------------------------

    Attachment: HDFS-3245.patch

The same patch for trunk
                
> Add metrics and web UI for cluster version summary
> --------------------------------------------------
>
>                 Key: HDFS-3245
>                 URL: https://issues.apache.org/jira/browse/HDFS-3245
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>    Affects Versions: 2.0.0-alpha
>            Reporter: Todd Lipcon
>            Assignee: Ravi Prakash
>         Attachments: HDFS-3245.branch-2.patch, HDFS-3245.branch-2.patch, HDFS-3245.patch
>
>
> With the introduction of protocol compatibility, once HDFS-2983 is committed, we have the possibility that different nodes in a cluster are running different software versions. To aid operators, we should add the ability to summarize the status of versions in the cluster, so they can easily determine whether a rolling upgrade is in progress or if some nodes "missed" an upgrade (eg maybe they were out of service when the software was updated)

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