please refer to :
http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/HdfsRollingUpgrade.html
On Tue, Feb 3, 2015 at 5:38 PM, Mr.J wrote:
> my cluster A, and cluster B. To upgrade to version 2.6
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> In what order should I upgrade?
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> Journalnode 1 >> Journalnode 2 > Journalnode 3 >> Namenode Std >> Namenode
> Act >> Datanode ??
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> Do I also need to upgrade the zookeeper?
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> hadoop-2.4.1 : JournalNode, Namenode, Datanode
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> zookeeper-3.4.6 : zookeeper
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> http://hadoop.apache.org/docs/r2.6.0/hadoop-project-dist/hadoop-hdfs/HdfsRollingUpgrade.html
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