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From aaron morton <aa...@thelastpickle.com>
Subject Re: backup strategy
Date Thu, 09 May 2013 22:41:49 GMT
Assuming you are using the SimpleStrategy or the NetworkTopologyStrategy and one rack per DC.
If you backed up every 2nd node you would get one copy *IF* all nodes were consistent on disk.
That can be a reasonably large if that you need to monitor.

It's easier to back up all the nodes it will also make it easier to restore the cluster.

Cheers

-----------------
Aaron Morton
Freelance Cassandra Consultant
New Zealand

@aaronmorton
http://www.thelastpickle.com

On 8/05/2013, at 8:54 AM, Kanwar Sangha <kanwar@mavenir.com> wrote:

> Hi – If we have a RF=2 in a 4 node cluster, how do we ensure that the backup taken
is only for 1 copy of the data ? in other words, is it possible for us to take back-up only
from 2 nodes and not all 4 and still have at least 1 copy of the data ?
>  
> Thanks,
> Kanwar
>  
>  
>  


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