System Design · Junior · Question 62 of 75

Why should every deployment be easy to roll back?

✓Correct answer: If a release breaks something, returning to the previous version quickly limits the damage
2Rollbacks make deployments faster
3Rollbacks are needed only for databases

Explanation

Immutable builds and versioned artifacts make rollback a quick switch. Database migrations must be compatible with the previous version.

Further reading

Martin Fowler: Blue-Green Deployment ↗

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