Exam Professional Cloud Developer topic 1 question 9 discussion

B Canary deployment allows you to release a new version of your application to a small subset of users before rolling it out to everyone. This strategy helps you identify potential issues with the new version while minimizing the impact on users, as only a small portion of traffic is directed to the new version initially.

this is A, Canary is a Testing strategy not a deployment strategy.

B. Canary deployment: In this strategy, the new version of the application (the "canary") is rolled out to a small subset of users before it is made available to the entire user base. This allows you to monitor the performance and stability of the new version in the real-world production environment with actual traffic, but only affects a small group of users. If issues arise, the canary deployment can be rolled back with minimal impact.

That's exactly what Canary Deployment is for.

B: https://cloud.google.com/architecture/application-deployment-and-testing-strategies#canary_test_pattern

I would go with B as it is best suited for this senario.

answer is B to reduce impact on users because it's a progressive release

I think A is correct because of the switching to green only happens after you perform all the tests on it. So you can also test traffic (to satisfy the question) This is the point of blue-green deployment as far as I understood it. B is not correct because the real traffic is switched partially to new version immediately and so it effects some users. reference: https://digitalvarys.com/what-is-blue-gren-deployment/

Blue/Green is 100% users to Green, Canary id progressive. B.

B is correct

For me it's B, in Canary Deployment only a percentage of users receives the new version and therefore in case of error immediately rollback , B/G immediately the new version , Green, receive all traffic and Blue marked as deprecated

I think the concept of google about B/G testing is that there is a shadow running next to production that receives the same traffic as production. When this shadow is not having any errors you can update the shadow to PROD. So no user is impacted, since all possible new errors will occur in the shadow and not in prod.

For me is B. But I cannot understand why all purchased exam test with this question, put Blue/Green as correct answer. It's so clear that Canary is the rightest one 'cos forward only a few of users to new deploy (not every as blue/green) and also allow the rollback action

B is correct. Blue Green(B/G) affects all users.

1. Reducing impact 2. Number of users affected If you want meet both of the conditions, you need to choose Canary

I think it is B, but correct answer is A, hmmm....... if we think that we need to test 100% of the traffic, i.e. create a full working test, then right A, because if there is an error we can quickly go back to the old version

Agree B