Implementing Cloud Design Patterns for AWS

Multi-data center pattern

The multi-server pattern guarantees resiliency at the server level, but can introduce an edge case. If the data center that the UI instances are in, goes under maintenance or has hardware failures that propagate upwards to the instances themselves, they might affect the end users, which is not acceptable. The UI instances cannot or should not be clustered, but should be present across different availability zones. This spanning across availability zones presents datacenter redundancy and is presented in the multi-data center pattern.

The steps for this pattern are nearly identical to the steps in the previous pattern except for two key differences. The first key difference is that the load balancer itself must cross multiple ...