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From "Ravindra Babu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-8914) Documentation conflict regarding fail-over of Namenode
Date Tue, 18 Aug 2015 12:10:48 GMT
Ravindra Babu created HDFS-8914:
-----------------------------------

             Summary: Documentation conflict regarding fail-over of Namenode
                 Key: HDFS-8914
                 URL: https://issues.apache.org/jira/browse/HDFS-8914
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: documentation
    Affects Versions: 2.7.1
         Environment: Documentation page in live
            Reporter: Ravindra Babu
            Priority: Trivial


Please refer to these two links and correct one of them.

http://hadoop.apache.org/docs/r2.7.1/hadoop-project-dist/hadoop-hdfs/HdfsDesign.html

The NameNode machine is a single point of failure for an HDFS cluster. If the NameNode machine
fails, manual intervention is necessary. Currently, automatic restart and failover of the
NameNode software to another machine is not supported.

http://hadoop.apache.org/docs/r2.7.1/hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithQJM.html

The HDFS High Availability feature addresses the above problems by providing the option of
running two redundant NameNodes in the same cluster in an Active/Passive configuration with
a hot standby. This allows a fast failover to a new NameNode in the case that a machine crashes,
or a graceful administrator-initiated failover for the purpose of planned maintenance.

Please keep one right version regarding failover statements.



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