# Resilience in Amazon AppSync
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The Amazon global infrastructure is built around Amazon Regions and Availability Zones. Amazon Regions provide multiple physically separated and isolated Availability Zones, which are connected with low-latency, high-throughput, and highly redundant networking. With Availability Zones, you can design and operate applications and databases that automatically fail over between zones without interruption. Availability Zones are more highly available, fault tolerant, and scalable than traditional single or multiple data center infrastructures. 

For more information about Amazon Regions and Availability Zones, see [Amazon Global Infrastructure](https://www.amazonaws.cn/about-aws/global-infrastructure/).

In addition to the Amazon global infrastructure, Amazon AppSync allows most resources to be defined using Amazon CloudFormation templates; for an example of using Amazon CloudFormation templates to declare Amazon AppSync resources, see [Practical use cases for Amazon AppSync Pipeline Resolvers](https://aws.amazon.com/blogs/mobile/appsync-pipeline-resolvers-1/) on the Amazon blog and the [Amazon CloudFormation User Guide](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/).