Read a Thin Book - Cloud Architecture Patterns - 1

Multisite Deployment

Definition

Deploying your application to multiple data centers. For both reading and writing.

Benefits

Reduce latency by routing client to nearest data center.
failover across data centers improves availability.

Constraints

Costly.
There will have data loss during failover.

Mechanics

Cloud platform provides service for geographic load balancing. Traffic Manager in Azure and Elastic Load Balancing in AWS.

Data replication between data storage in different data centers. (eventual consistency)

Challenges

Determine service failure

Misc

Geographic load balancing and data replication are all configurable in cloud platforms.