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From William Oberman <>
Subject Re: VPC AWS
Date Thu, 05 Jun 2014 13:06:59 GMT
I don't think traffic will flow between "classic" ec2 and vpc directly.
There is some kind of gateway bridge instance that sits between, acting as
a NAT.   I would think that would cause new challenges for:

Sorry this response isn't heavy on content!  I'm curious how this thread


On Thursday, June 5, 2014, Alain RODRIGUEZ <> wrote:

> Hi guys,
> We are going to move from a cluster made of simple Amazon EC2 servers to a
> VPC cluster. We are using Cassandra 1.2.11 and I have some questions
> regarding this switch and the Cassandra configuration inside a VPC.
> Actually I found no documentation on this topic, but I am quite sure that
> some people are already using VPC. If you can point me to any documentation
> regarding VPC / Cassandra, it would be very nice of you. We have only one
> DC for now, but we need to remain multi DC compatible, since we will add DC
> very soon.
> Else, I would like to know if I should keep using EC2MultiRegionSnitch or
> change the snitch to anything else.
> What about broadcast/listen ip, seeds...?
> We currently use public ip as for broadcast address and for seeds. We use
> private ones for listen address. Machines inside the VPC will only have
> private IP AFAIK. Should I keep using a broadcast address ?
>  Is there any other incidence when switching to a VPC ?
> Sorry if the topic was already discussed, I was unable to find any useful
> information...

Will Oberman
Civic Science, Inc.
6101 Penn Avenue, Fifth Floor
Pittsburgh, PA 15206
(M) 412-480-7835

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