Amazon Route 53 Traffic Flow Announces Support For Geoproximity Routing With Traffic Biasing
If you're using Route 53 traffic flow, you can now use geoproximity routing, which lets you route traffic based on the physical distance between your users and your resources. You can also route more or less traffic to each resource by specifying a positive or negative bias.
When you create a traffic flow policy, you can specify either an AWS region (if you're using AWS resources) or the latitude and longitude for each endpoint. For example, suppose you have EC2 instances in the AWS US East (Ohio) region and in the US West (Oregon) region. When a user in Los Angeles browses to your website, geoproximity routing will route the DNS query to the EC2 instances in the US West (Oregon) region because it's closer geographically. If you want a larger portion of users in the middle of the United States to be routed to one region, you can specify a positive bias for that region, a negative bias for the other region, or both.
To use geoproximity routing, create traffic flow rules that have a routing policy of Geoproximity. You can set up this feature using the traffic flow console or the Route 53 API.