On Sep 17, 2010, at 1:36 AM, ChingShen wrote:

> I think I got it!
> 
> Step by step as following:
> 
> 1. put two files into hdfs.
> 2. kill -9 ${namenode_pid}.
> 3. delete the whole ${hadoop.tmp.dir}/dfs directory of NN.
> 4. copy the dfs directory of BN to NN.
> 5. start-up NN.
> 
> It works. Is it correct?


In my continuing streak of writing content for the wiki, I just filled in a 
page we've apparently had empty for a while now:

http://wiki.apache.org/hadoop/NameNodeFailover

Note: I'm not fully awake.  It is likely missing stuff.

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