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From Todd Lipcon <t...@cloudera.com>
Subject Re: effect on data after topology change
Date Tue, 17 Jan 2012 18:41:51 GMT
Hi Ravi,

You'll probably need to up the replication level of the affected files
and then drop it back down to the desired level. Current versions of
HDFS do not automatically repair rack policy violations if they're
introduced in this manner.

-Todd

On Mon, Jan 16, 2012 at 3:53 PM, rk vishu <talk2hadoop@gmail.com> wrote:
> Hello All,
>
> If i change the rackid for some nodes and restart namenode, will data be
> rearranged accordingly? Do i need to run rebalancer?
>
> Any information on this would be appreciated.
>
> Thanks and Regards
> Ravi



-- 
Todd Lipcon
Software Engineer, Cloudera

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