04-05 Highly Fault Tolerant
Your ability for your service to ensure there is no single point of failure. Preventing the chance of failure.
Fail-overs are when you have a plan to shift traffic to a redundant system in case the primary system fails.
Example
A common example is having a copy (secondary) of your database where all ongoing changes are synced. The secondary system is not in-use until a fail over occurs and it becomes the primary database.
# RDS Multi-AZ
#aws-service #aws-resource
RDS Multi-AZ is an AWS Service that lets you run a duplicate standby database in another Availability Zone in case your primary database fails.