Abstract
Things to Note
Traffic Redirection
- Effective tools are needed to direct traffic to the correct data center
- geoDNS can be used to direct traffic to the nearest data center depending on where a user is located
Data Synchronization
- Users from different regions could use different local Database or Cache Server
- In failover cases, traffic might be routed to a data center where data is unavailable
- A common strategy is to replicate data across multiple data centers. Like the asynchronous multi-data center replication by Netflix
Test and Deployment
- Automated deployment tools like Terraform are vital to keep services consistent through all the data centers
