Amazon Systems Manager Change Manager is no longer open to new customers. Existing customers can continue to use the service as normal. For more information, see Amazon Systems Manager Change Manager availability change.
Resilience in Amazon Systems Manager
The Amazon global infrastructure is built around Amazon Web Services Regions and Availability Zones. Amazon Web Services 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 Web Services Regions and Availability Zones, see Amazon Global
Infrastructure