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Date: Thu, 11 Aug 2011 00:45:27 +0000 (UTC)
From: "Suresh Srinivas (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Resolved] (HDFS-1974) HA: Introduce active and standby
 states to the namenode
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     [ https://issues.apache.org/jira/browse/HDFS-1974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Suresh Srinivas resolved HDFS-1974.
-----------------------------------

      Resolution: Fixed
    Hadoop Flags: [Reviewed]

I committed the patch to HDFS-1623 branch.

> HA: Introduce active and standby states to the namenode
> -------------------------------------------------------
>
>                 Key: HDFS-1974
>                 URL: https://issues.apache.org/jira/browse/HDFS-1974
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: name-node
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>         Attachments: HDFS-1974.1.patch, HDFS-1974.2.patch, HDFS-1974.3.patch, HDFS-1974.4.patch, HDFS-1974.5.patch, HDFS-1974.6.patch, HDFS-1974.patch
>
>
> Currently namenode supports active, secondary and backup roles. To support namenode high availability, active and standby states are needed. Note that this is different from the existing notion of namenode role, where a namenode cannot transition from one role to the other.

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