01
Parallel capacity
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Azure DevOps Academy · Design Patterns
Blue-Green Deployment
Run old and new versions in parallel before controlled traffic switching.
Objective: Reduce release downtime and enable fast reversal.
Practical guidance
Requirements
02
Traffic switch control
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03
Backward-compatible data
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04
Automated verification
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Practical guidance
Decision gates
01
Health checks pass
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02
Data compatibility proven
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03
Observability confirms behaviour
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04
Rollback remains available
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Practical guidance
Limitations
01
Higher temporary cost
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02
State migration complexity
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03
Long-running connection handling
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04
Operational duplication
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