What is a 'blue-green' deployment and how does it relate to SAD maintenance?

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Multiple Choice

What is a 'blue-green' deployment and how does it relate to SAD maintenance?

Blue-green deployment is a release approach that minimizes downtime and risk by running two identical production environments and switching user traffic between them. You deploy the new version to the idle environment, verify it in production-like conditions, and then flip all traffic to that environment in a controlled cutover. If something goes wrong, you can quickly revert by directing traffic back to the original environment, making maintenance safer and faster with near-zero downtime. This directly supports safe maintenance because updates are isolated from the live system until you’re ready to switch, and rollback is straightforward. The other options don’t fit as well. Delaying updates to avoid risk describes postponing releases rather than enabling safe, swift transitions. Using multiple data centers describes broad availability or DR strategies, not the two identical environments you swap between. Migrating data to cold storage is about data lifecycle management, not deployment and traffic routing.

Blue-green deployment is a release approach that minimizes downtime and risk by running two identical production environments and switching user traffic between them. You deploy the new version to the idle environment, verify it in production-like conditions, and then flip all traffic to that environment in a controlled cutover. If something goes wrong, you can quickly revert by directing traffic back to the original environment, making maintenance safer and faster with near-zero downtime. This directly supports safe maintenance because updates are isolated from the live system until you’re ready to switch, and rollback is straightforward.

The other options don’t fit as well. Delaying updates to avoid risk describes postponing releases rather than enabling safe, swift transitions. Using multiple data centers describes broad availability or DR strategies, not the two identical environments you swap between. Migrating data to cold storage is about data lifecycle management, not deployment and traffic routing.

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