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https://issues.apache.org/jira/browse/HDFS-1064?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12849492#action_12849492
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Jeff Hammerbacher commented on HDFS-1064:
-----------------------------------------

It's also probably worth linking to some of the DRBD-based work on HA that's 
been done elsewhere
* 
http://www.scribd.com/doc/20971412/Hadoop-World-Production-Deep-Dive-with-High-Availability
* http://www.cloudera.com/blog/2009/07/hadoop-ha-configuration/

> NN Availability - umbrella Jira
> -------------------------------
>
>                 Key: HDFS-1064
>                 URL: https://issues.apache.org/jira/browse/HDFS-1064
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: Sanjay Radia
>
> This is an umbrella jira for discussing availability of the HDFS NN and 
> providing references to other Jiras that improve its availability. This 
> includes, but is not limited to, automatic failover. 

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