Production Systems Engineering

Blue-Green Deployments

Run two identical environments, blue (current) and green (new). Switch traffic all at once, and switch back instantly if something breaks. Fast rollback, at the cost of double infrastructure.


The Concept Explained

Coming soon.


How It Works

Coming soon.


Production Implications

Coming soon.


Tradeoffs and Decision Framework

Coming soon.


Common Mistakes

Coming soon.


INTERVIEW QUESTION

Explain blue-green deployment. What's the main advantage over rolling deployments, what does it cost, and how do you handle database schema changes during the cutover?