Mailing-List: contact hdfs-issues-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: hdfs-issues@hadoop.apache.org
Date: Tue, 2 Aug 2011 15:21:27 +0000 (UTC)
From: "Dennis Oberhoff (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: 
 <263868487.1736.1312298487187.JavaMail.tomcat@hel.zones.apache.org>
In-Reply-To: 
 <549815850.11535.1307730598758.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Commented] (HDFS-2064) Warm HA NameNode going Hot
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


    [ https://issues.apache.org/jira/browse/HDFS-2064?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13076264#comment-13076264 ] 

Dennis Oberhoff commented on HDFS-2064:
---------------------------------------

No not yet. Currently you have to start the Node as BackUp Node. This will import the fsimage to the SBN. After it you have to kill the Node and restart it as Standby. Right now -importCheckpoint doesn't seem to do the work.Would be nice if this procedure could be implemented into the Standby Mode. 

> Warm HA NameNode going Hot
> --------------------------
>
>                 Key: HDFS-2064
>                 URL: https://issues.apache.org/jira/browse/HDFS-2064
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: name-node
>    Affects Versions: 0.22.0
>            Reporter: Konstantin Shvachko
>            Assignee: Konstantin Shvachko
>            Priority: Blocker
>         Attachments: WarmHA-GoingHot.pdf, failover-v-0.22.patch
>
>
> This is the design for automatic hot HA for HDFS NameNode. It involves use of HA software and LoadReplicator - external to Hadoop components, which substantially simplify the architecture by separating HA- from Hadoop-specific problems. Without the external components it provides warm standby with manual failover.

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira