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From Hairong Kuang <hair...@yahoo-inc.com>
Subject Re: getting HDFS to rack-aware mode
Date Tue, 14 Oct 2008 19:19:08 GMT
Using -w option for the set replication command will wait until replication
is done. Then run fsck to check if the all blocks are on at least two racks.

Hairong


On 10/14/08 12:06 PM, "Sriram Rao" <sriramsrao@gmail.com> wrote:

> Hi,
> 
> We have a cluster where we running HDFS in non-rack-aware mode.  Now,
> we want to switch HDFS to run in rack-aware mode.  Apart from the
> config changes (and restarting HDFS), to rackify the existing data, we
> were thinking of increasing/decreasing replication level a few times
> to get the data spread.  Are there any tools that will enable us to
> know when we are "done"?
> 
> Sriram


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