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 <[email protected]> wrote: > my cluster A, and cluster B. To upgrade to version 2.6 > > In what order should I upgrade? > > Journalnode 1 >> Journalnode 2 > Journalnode 3 >> Namenode Std >> Namenode > Act >> Datanode ?? > > Do I also need to upgrade the zookeeper? > > > > hadoop-2.4.1 : JournalNode, Namenode, Datanode > > zookeeper-3.4.6 : zookeeper > > > > > http://hadoop.apache.org/docs/r2.6.0/hadoop-project-dist/hadoop-hdfs/HdfsRollingUpgrade.html > > > > > > > > > > > > > >
