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https://issues.apache.org/jira/browse/HDFS-2124?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uma Maheswara Rao G resolved HDFS-2124.
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Resolution: Won't Fix
Hot standby functionality acheived by shared storage approach in HDFS-1623
now..I think ok to close this JIRA now.
> Namenode HA using Backup Namenode as Hot Standby
> ------------------------------------------------
>
> Key: HDFS-2124
> URL: https://issues.apache.org/jira/browse/HDFS-2124
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: datanode, hdfs-client, namenode
> Affects Versions: 0.20.2, 0.21.0
> Reporter: Justin Joseph
> Attachments: Namenode HA using Backup Namenode as Hot Standby.pdf
>
>
> This is to share our experiences on building Automatic, Hot High Availability
> for Namenode, leveraging the existing Backup Namenode.
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