Blue Green Deployment
Blue Green Deployment is a software release strategy that involves maintaining two identical production environments, called Blue and Green. At any given time, only one environment (e.g., Blue) serves live traffic while the other (e.g., Green) hosts the new version of the application. This allows for zero-downtime deployments and easy rollbacks by switching traffic between environments.
Developers should use Blue Green Deployment when they need to minimize downtime and risk during software releases, especially for critical applications like e-commerce sites or financial services. It's ideal for continuous delivery pipelines, enabling safe testing of new versions in a production-like setting before cutting over traffic, and providing an instant fallback if issues arise.