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From varun kumar <varun....@gmail.com>
Subject Re: Moving master and namenode...
Date Sun, 10 Feb 2013 20:09:38 GMT
Hi Jean,

Steps need to followed during migration of namenode.

1.Make New Server with same hostname.
2.Install hadoop
3.copy the metadata from old server and paste it in new server.
4.Make sure all the datanodes are down.
5.Stop old namenode
6.Start New namenode with old metadata.
7.if it come up properly,start all datanodes.

On Sat, Feb 9, 2013 at 9:32 PM, Jean-Marc Spaggiari <jean-marc@spaggiari.org
> wrote:

> Hi,
> I have added one new server in my cluster and I want to move the
> master and the namenode into this new server, and install the previous
> master as a datanode/RS.
> In the existing namenode, I will need to backup the NameNode storage
> directories and restore them on the new namenode, and then reconfigure
> all the servers to use this new namenode. Is that the right way to
> proceed? Any risks for the data?
> Regarding the master, I simply need to configure all the region
> servers to point to this new master? Nothing I need to transfert from
> the existing master to the new one?
> I just want to make sure I don't miss something and lose everything.
> Thanks,
> JM

Varun Kumar.P

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