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From Vijay <>
Subject Re: EC2 Snitch
Date Wed, 11 May 2011 11:20:35 GMT
We are using this patch in our multi-region testing... yes this approach is
going to be integrated into once it is committed
(you might want to wait for that). Yes this fix the Amazon infrastructure
problems and it will automatically detect the DC and RAC.... only thing is
that we have to allow IP's in the security groups to talk to each
other's region.


On Tue, May 10, 2011 at 6:19 PM, Sameer Farooqui <>wrote:

> Has anybody successfully used EC2 Snitch for cross-region deployments on
> EC2? Brandon Williams has not recommended using this just yet, but I was
> curious if anybody is using it with 0.8.0.
> Also, the snitch just let's the cluster automatically discover what the
> different regions (aka data centers) and racks (aka availability zones) are,
> right? So, does this fix the Amazon NATed infrastructure problem where we
> can't use the Amazon external IP as the Cassandra listen address? Cassandra
> can only bind to addresses that are attached to the server and the Amazon
> external IP is NATed so Cassandra can't see it.
> The EC2-Snitch patch was kinda unclear on this:
> Also, the nightly builds link to Cassandra seems to be down, has it been
> relocated?
> (click on Latest Builds/Hudson link on right):
> This link is dead:

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