For this question, refer to the Dress4Win case study. You want to ensure that your on-premises architecture meets business requirements before you migrate your solution. What change in the on-premises architecture should you make?
A.
Replace RabbitMQ with Google Pub/Sub.
B.
Downgrade MySQL to v5.7, which is supported by Cloud SQL for MySQL.
C.
Resize compute resources to match predefined Compute Engine machine types.
D.
Containerize the micro-services and host them in Google Kubernetes Engine.
Be careful, because in the case study that you can find in google website MySQL version is 5.7 https://cloud.google.com/certification/guides/cloud-architect/casestudy-dress4win-rev2
Downgrade is possible from 5.7 to 5.6, which is in the same major version. So downgrade from 5.8 to 5.7 makes sense. Containerize the java applications require to build kubernetes infrastructures in the on-premise environment, it's not in the plan. So the answer goes to B.
Replace RabbitMQ with pub sub …A
https://docs.devicewise.com/Content/Products/GatewayDevelopersGuide/CloudConnectors/GoogleCloud/GoogleCloudPlatform.htm
Containerizing the existing applications ensures efficient use of resources. This activity the business requirement “optimize architecture for performance in the cloud”. As a precursor to Cloud migration, you could convert the microservices to containers and host them on GKE on-prem: https://cloud.google.com/anthos/gke/docs/on-prem/overview which also makes it very easy for you to migrate to Cloud. GKE on-prem is hybrid cloud software that brings Google Kubernetes Engine (GKE) to on-premises data centres. With GKE on-prem, you can create, manage, and upgrade Kubernetes clusters in your on-premises environment.
'D' as it matches the requirement - Improve business agility and speed of innovation through rapid provisioning of new resources. Among the choices, containerizing microservices will allow the company to deploy and scale services independantly.
One important Update related to case study - Date - 27-04-2021
Right answer is option D ---
Case Study for Dress4win is updated, MYSQL version 5.7 is mentioned in the case study and not 5.8 as given in here. This makes option B invalid. Right answer is option D. In the exam I saw option B was still given to confuse people, but in the case study they mentioned the MYSQL version 5.7 and not 5.8. So despite of being confident about the case studies, ensure that you read it thoroughly even during the exam. Time is given sufficient enough.
Answer is D
A: If you are expecting to "install" pub/sub locally and not connect to the hosted GCP service, you cannot use pub/sub, if it is okay for you to use hosted pub/sub and then do the rest of the processing on prem but you won't get a readily available system or you'll have to integrate a lot of things.
B: 5.8 is basically 8.0 and it is supported
C: Best practice is to find the predefined types on GCP as close to the physical server spec and not the other way around.
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