# Architecture principles whose scope is release

> 4 records

This index as JSON: https://banes-lab.com/json/api/facets/architecture/scope/release

## Entries

- [Feature Toggle](https://banes-lab.com/records/architecture/feature-toggle.md): A mechanism that switches a code path on or off at runtime from externally held flag state, so a release can happen without a deploy.
- [Rollback](https://banes-lab.com/records/architecture/rollback.md): A mechanism that restores the previous versioned release when a deployment fails its verification.
- [Blue-Green Deployment](https://banes-lab.com/records/architecture/blue-green-deployment.md): A design pattern that deploys a release to an idle copy of production, verifies it, and switches traffic to it at once.
- [Canary Deployment](https://banes-lab.com/records/architecture/canary-deployment.md): A design pattern that sends a small share of traffic to a new release and widens the share only while its error and latency stay within limits.