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How to upgrade hadoop cluster?

+1 vote
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I want to upgrade my cluster ,in doc,one of step is backup namenode dfs.namenode.name.dir directory.
I have two directories defined in hdfs-site.xml, should I backup them all ,or just one of them?

dfs.namenode.name.dir
file:///data/namespace/1,file:///data/namespace/2
posted May 19, 2014 by Navneet

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1 Answer

0 votes

Backing up one of them is sufficient, but do check if both their contents are same and backup the more recent one (a mount may lag behind if it had a failure earlier, for ex.).

answer May 19, 2014 by Sheetal Chauhan
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