At the core of an AWS system is, “Design for Fail” principle. It means if we design the software for failure nothing will fail.
If we follow a pessimist approach while designing architecture in the cloud, we will assume that things will fail. To handle such failure, we will always create a system that can have automated recovery from failure.
An AWS system is designed to automatically recover from design, execution and deploy stage failures.Read the full book at www.amazon.com