Google Professional Cloud Network Engineer Question 438
Single answerGoogle Cloud PlatformYour company runs a web application on Google Cloud that experiences sudden and unpredictable spikes in traffic. The application is hosted on a managed instance group (MIG) within a specific region. To handle the traffic spikes effectively, you need to configure the MIG to accommodate workload increases while controlling costs. What is the recommended configuration?
- A
Enable autoscaling based on CPU utilization and set a target CPU utilization threshold.
- B
Manually monitor traffic patterns and adjust the number of instances in the managed instance group as needed.
- C
Configure autoscaling based on the HTTP load balancer's request rate per instance.
- D
Set up a fixed number of instances in the managed instance group to handle the highest predicted traffic spike.
Show answer and explanation
Correct answer: A
Explanation
Autoscaling based on CPU utilization is a fundamental feature of Google Cloud's managed instance groups. It allows the infrastructure to dynamically scale up or down based on actual workload, ensuring optimal performance during traffic spikes while minimizing costs during idle periods. Manually scaling or setting a fixed number of instances lacks the flexibility and cost-effectiveness of autoscaling.
- A. Correct.
Correct: Autoscaling based on CPU utilization is an efficient way to dynamically adjust the number of instances in the managed instance group based on workload. Setting a target CPU utilization threshold ensures that scaling happens automatically when traffic spikes occur, optimizing resource usage and costs.
- B. Incorrect.
Incorrect: Manually monitoring and adjusting the number of instances is labor-intensive, prone to errors, and not suitable for unpredictable spikes in traffic. Autoscaling provides a more reliable and automated solution.
- C. Incorrect.
Incorrect: While scaling based on the HTTP load balancer's request rate per instance is a valid option, it is not the most common or recommended approach for many workloads. CPU utilization is typically a better metric for general-purpose autoscaling.
- D. Incorrect.
Incorrect: Setting up a fixed number of instances to handle the highest predicted traffic spike leads to unnecessary costs during periods of low traffic. Autoscaling provides a cost-effective alternative.