There is a parameter (dfs.balance.bandwidthPerSec) that limits the
rebalancing bandwidth.  The default is rather low.

See http://developer.yahoo.com/hadoop/tutorial/module2.html#rebalancing

On Wed, Aug 12, 2009 at 7:36 PM, yang song <hadoop.ini...@gmail.com> wrote:

> I'm trying to use the balance tool(bin/hadoop balancer -t xxx). However,
> the
> data transfer is so slow that it will take a long long time.
> Is there a good method to solve it?
>



-- 
Ted Dunning, CTO
DeepDyve

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