Google Professional Cloud Network Engineer Question 395
Single answerGoogle Cloud PlatformYour organization hosts a web application on Google Cloud and uses a managed instance group (MIG) to ensure scalability and high availability. The team wants to configure the application to handle sudden traffic spikes efficiently while minimizing costs during low-traffic periods. What configuration should you implement to meet these requirements?
- A
Enable autoscaling on the managed instance group with a target CPU utilization policy.
- B
Set the instance group size to a fixed number of instances to handle traffic spikes.
- C
Configure an HTTP health check to ensure only healthy instances receive traffic.
- D
Use a preemptible VM template in the instance group to reduce costs during low-traffic periods.
Show answer and explanation
Correct answer: A
Explanation
To handle traffic spikes efficiently while minimizing costs during low-traffic periods, enabling autoscaling on the managed instance group with a target CPU utilization policy is the best approach. Autoscaling dynamically adjusts the number of instances based on the workload, ensuring adequate resources during high demand and reducing unnecessary costs during low demand. Fixed instance group sizes or preemptible VMs do not adequately address the efficiency and cost requirements in this scenario.
- A. Correct.
Correct. Enabling autoscaling with a target CPU utilization policy allows the MIG to automatically scale up or down based on traffic demands, ensuring efficient handling of traffic spikes while minimizing costs during low-traffic periods.
- B. Incorrect.
Incorrect. Setting a fixed number of instances does not allow for dynamic scaling, which may lead to over-provisioning during low-traffic periods or under-provisioning during traffic spikes.
- C. Incorrect.
Incorrect. While HTTP health checks are important for ensuring traffic is sent only to healthy instances, they do not address the requirement to handle traffic spikes efficiently or minimize costs during low-traffic periods.
- D. Incorrect.
Incorrect. Using preemptible VM templates can reduce costs but is not suitable for handling traffic spikes as preemptible VMs can be terminated by Google Cloud at any time, potentially causing instability.