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Your organization has hosted an application which needs to be upgraded often. You have been asked to ensure the availability of application in production environment and use Blue-Green deployment to reduce the risk of downtime while upgrading newer versions in production.
What of the following approaches best defines a Blue-Green deployment?
Create a second environment to deploy a new version of an application. Once the new environment is tested, redirect the traffic to it and take off the old environment.
Run two versions of an application at the same time. Redirect a fraction of requests to each version and team can compare the versions
Run a new version of a microservice along with the old version. Redirect a fraction of requests to new version and team can test the functioning of new version with the overall system.
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