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From Vijay <vijay2...@gmail.com>
Subject Re: Does anybody have experience with running Cassandra in Amazon's Virtual Private Cloud (VPC)?
Date Sun, 08 May 2011 23:50:33 GMT
We are planning to use EIP's +
https://issues.apache.org/jira/browse/CASSANDRA-2452 for AWS multi region
deployment.

Regards,
</VJ>



On Thu, May 5, 2011 at 5:01 PM, aaron morton <aaron@thelastpickle.com>wrote:

> There have been some recent discussions about different EC2 deployments,
> may be be exactly what you are looking for but try start here
>
> http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Re-IP-address-resolution-in-MultiDC-setup-EC2-VIP-td6306635.html
>
>
> <http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Re-IP-address-resolution-in-MultiDC-setup-EC2-VIP-td6306635.html>
>  -----------------
> Aaron Morton
> Freelance Cassandra Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 6 May 2011, at 09:21, Sameer Farooqui wrote:
>
> Here is an image that shows what the Amazon VPC we're thinking about using
> looks like:
>
> http://i.imgur.com/OUe1i.png
>
>
> We would like to configure a 2 node Cassandra cluster in the private subnet
> and a read/write web application service in the public subnet. However, we
> also want to span the Cassandra cluster across from the Virginia VPC to a
> California VPC and have 2 Cassandra nodes in the private subnet in Virginia
> and 1 node in the private subnet in California.
>
>
>
> Amazon states that EC2 instances in Virginia’s VPC can communicate with EC2
> instances in California’s VPC as long as all communication takes place over
> the internet gateway of each VPC and uses Elastic IP addresses as the
> specified source or destination address.
>
>
> But Amazon also says that “EIP addresses should only be used on instances
> in subnets configured to route their traffic directly to the Internet
> Gateway”. So, by this they must mean the public subnet in the diagram above.
> Amazon goes on to say “EIPs cannot be used on instances in subnets
> configured to use a NAT instance to access the Internet.”
>
>
> It looks like we cannot have a Cassandra cluster spanning two Private
> Subnets in two different regions. Can somebody with VPC experience confirm
> this?
>
>
> Also has anybody successfully deployed a Cassandra cluster in private
> subnets spanning multiple regions? Any tips from your experience? How did
> you find the latency over VPCs and gateways across regions?
>
>
>
> - Sameer
>
> Accenture Technology Labs
>
>
>

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