It's probably time we took a brief overview of how AWS is set up.
Each AWS region is broken down into availability zones.
Each availability zone shares nothing with the other availability zones within the same region. The upshot of this is that if there is a service outage within a particular availability zone, servers in the other availability zones will not be affected. However, the downside of this is than availability zone-specific items such as Elastic Block Store (EBS) disk, cannot be made available to other availability zones within the same region.
When migrating your applications to the AWS cloud, the first ...