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We have a huge data say 1000GB that will need to move from one EC2 instance in us-east-1a to us-east-1b using private IPs.

Problem: We are planning to setup multi az MySQL cluster which will be having 1 master and 5 replicas spread across different AZs. But we are concerned about the data replicated across to maintain the master-slave setup.

We wanted to know what would be the total cost incur during this operation in data transfer amongst different AZs?

Note: We have a NAT gateway to communicate to the internet from the instances which are in private subnet. These instances are in the private subnet.

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$0.01/GB in each direction where in each direction means that you’ll pay $10 for your 1000GB of data going out from the first instance and than another $10 for data coming in to the second instance. See Data Transfer within the same AWS Region for more details.

You may also consider other options. E.g. create a snapshot from your data volume and restore it to a new volume in the other region that you can then attach to your second instance.

Hope that helps!

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