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From Robert Coli <>
Subject Re: making sure 1 copy per availability zone(rack) using EC2Snitch
Date Mon, 09 Sep 2013 16:43:52 GMT
On Mon, Sep 9, 2013 at 8:56 AM, rash aroskar <>wrote:

> I am planning my new cassandra 1.2.5 cluster with all nodes in single
> region but divided among 2 availablity zones equally. I want to make sure
> with replication factor 2 I get 1 copy in every availability zone. As per
> my knowledge using placement strategy EC2Snitch should take care of this.
> Is this correct? Do I need to specify any strategy options?

Has background on how one must configure all rack aware snitches.

If you may ever have a Cassandra "DC" outside of EC2, for example for
Disaster Recovery, use GossipingPropertyFileSnitch.

Also, deploy on 1.2.9, not 1.2.5.


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