June 20, 2024

Blue/Green Deployment
– New code deployed to second prod environment
– After testing, load balancer sends all prod traffic to new code
– Requires two production environments

Canary Testing
– New code deployed to second prod environment
– Small proportion of users directed to new code
– Requires two production environments

A/B Testing
– Run experiments of two different versions of a page in production
– Typically Javascript code changes the UI dynamically
– Does not require two production environments

Links:
Blue-green Deployments, A/B Testing, and Canary Releases
Blue Green Deployment, Canary Run, A/B testing difference