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Choosing an AWS Region

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Choosing your region is a very important step before deploying all your infrastructure on the cloud. All AWS regions (except Gov regions) are available for you to use. And you can deploy services in different regions simultaneously, or using different AZs within the region. And also you could later migrate services between different services.

Usually, it’s a good practice to keep your infrastructure in one region. AWS regions have 3 AZs, so you can define services that are redundant across different datacenters. Using one region will simplify communication between different AWS services. And also avoid additional intra-region data traffic costs.

There are 4 aspects to consider before defining your regions:

1. Latency

Latency is the time it takes for the data to travel from the user to your servers, and return. Interactive applications, where the user sends data and expect a quick response, are sensible to latency.
You can use the AWS latency check tool for a quick check of the latency from your location to every AWS Region.

2. Service Availability

All AWS regions have core services (for example AWS EC2, S3, and RDS). But newer AWS services aren’t available in all regions. You can use AWS Regional Table to check if the services you expect to use are available in the desired region.

3. Legal considerations

Your company might have restrictions regarding where to store the information. From a legal perspective, it’s very different to store your data in the US, Europe, or China.

4. Costs

The price of each AWS Service differs according to the region. For example, services in US regions are generally the least expensive. You can access AWS AWS Calculator to create an estimation of the prices on each region.

These aspects should give you the main guidelines to define the AWS region to deploy your services. You can also check AWS Regions to get a 3D world map showing all AWS regions and their interconnections.

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