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?
Shen
On Fri, Sep 17, 2010 at 2:58 PM, ChingShen <[email protected]> wrote:
> Hi all,
>
> I have a Backup Node (BN) and a active NameNode (NN), but if NN failed,
> how to recover the NN? Is possible BN replace NN directly? Any resources?
>
> Shen
>
