In addition always read the NEWS.txt file in the distribution and glance at the CHANGES.txt file. 

Cheers

-----------------
Aaron Morton
Freelance Developer
@aaronmorton

On 4/06/2012, at 12:19 PM, Roshan wrote:

Hi

Hope this will help to you.

http://www.datastax.com/docs/1.0/install/upgrading
http://www.datastax.com/docs/1.1/install/upgrading

Thanks.

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