# Blue-green deploys

> Blue-green: the new version comes up beside the old one, so a bad deploy breaks 10% of requests.

## Prerequisites

Research these first: [Continuous delivery](https://wiki.playquorum.dev/research/ci.md).

## Facts

Blue-green deploys
- **Track:** Reliability
- **Era:** [Seed](https://wiki.playquorum.dev/eras/seed.md)
- **Cost:** 450 450 900
- **Requires:** [Continuous delivery](https://wiki.playquorum.dev/research/ci.md)

## See also

- [Research tree](https://wiki.playquorum.dev/research.md)

Source: https://wiki.playquorum.dev/research/blue-green