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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