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From Michi Mutsuzaki <mi...@cs.stanford.edu>
Subject Re: Can Observers be reconfigured in a DR situation?
Date Tue, 10 Jul 2012 03:20:05 GMT
Hi Raj,

3 nodes cannot form a quorum in a 6-node cluster. You need at least 4
nodes. If you need to tolerate a data center failure, you probably
need at least 3 data centers.

--Michi

On Mon, Jul 9, 2012 at 2:16 PM, Raj N <raj.cassandra@gmail.com> wrote:
> Let's say you have 2 DCs, primary and secondary. The primary DC has a 3
> node zookeeper quorum. And the secondary DC has 3 nodes that are observers.
> Is it possible in a DR scenario(primary down) to make the 3 observer nodes
> the new quorum?
>
> Thanks
> -Raj

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