Google Professional Cloud Developer Question 293
Select 3Google Cloud PlatformYou are a cloud developer working on an e-commerce application running on Google Cloud. The application is deployed on a managed instance group (MIG) behind a global HTTP(S) load balancer. You need to perform load testing to ensure the system can handle high traffic during an upcoming sale. Which steps should you take to perform the load testing effectively while adhering to Google Cloud best practices?
- A
Use a load testing tool like Apache JMeter or Locust to simulate traffic and deploy the tool in a separate Google Cloud project.
- B
Configure the load testing tool to send traffic directly to the backend instance group to avoid load balancer costs.
- C
Gradually increase the traffic load during the test to identify the system's scaling behavior and breaking point.
- D
Use Cloud Monitoring and Cloud Trace during the test to analyze system performance and identify bottlenecks.
- E
Set up load testing scripts to run indefinitely to ensure continuous stress on the application.
Show answer and explanation
Correct answers: A, C, D
Explanation
Effective load testing involves using the correct tools, simulating realistic traffic patterns, and monitoring the system's performance. Deploying load testing tools in a separate project ensures isolation, while gradually increasing traffic provides insights into the system's behavior under increasing load. Using monitoring tools like Cloud Monitoring and Cloud Trace is crucial for diagnosing performance issues and bottlenecks. Avoid bypassing key components like the load balancer, as it doesn't reflect real-world traffic patterns, and ensure load tests are time-bound to prevent resource wastage.
- A. Correct.
Correct: Using a load testing tool like Apache JMeter or Locust and deploying it in a separate Google Cloud project ensures isolation and prevents interference with production workloads. This is a best practice for load testing.
- B. Incorrect.
Incorrect: Sending traffic directly to the backend instance group bypasses the load balancer, which is not representative of normal application traffic flow. The load balancer plays a critical role in distributing traffic and needs to be part of the test.
- C. Correct.
Correct: Gradually increasing the traffic load helps assess the system's ability to scale and determine its limits under stress. This is a standard approach in load testing.
- D. Correct.
Correct: Tools like Cloud Monitoring and Cloud Trace provide insights into system performance, scalability, and potential bottlenecks during the test, helping diagnose issues effectively.
- E. Incorrect.
Incorrect: Running load tests indefinitely can lead to unnecessary resource usage and costs. Load tests should be designed with clear objectives and should stop once those objectives are met.