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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-1975) HA: Support for sharing the namenode state from active to standby.
Date Fri, 20 May 2011 16:36:47 GMT
HA: Support for sharing the namenode state from active to standby.
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                 Key: HDFS-1975
                 URL: https://issues.apache.org/jira/browse/HDFS-1975
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: name-node
            Reporter: Suresh Srinivas


To enable hot standby namenode, the standby node must have current information for - namenode
state (image + edits) and block location information. This jira addresses keeping the namenode
state current in the standby node. To do this, the proposed solution in this jira is to use
a shared storage to store the namenode state. 

Note one could also build an alternative solution by augmenting the backup node. A seperate
jira could explore this.


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