Practice Test 1 | Google Cloud Certified Professional Cloud Architect | Dumps | Mock Test
One of the microservices in your application has an intermittent performance problem. You have not observed the problem when it occurs but when it does, it triggers a particular burst of log lines. You want to debug a machine while the problem is occurring. What should you do?
A. Log into one of the machines running the microservice and wait for the log storm.
B. In the Operations Suite (formerly Stackdriver) Error Reporting dashboard, look for a pattern in the times the problem occurs.
C. Configure your microservice to send traces to Operations Suite (formerly Stackdriver) Trace so you can find what is taking so long.
D. Set up a log metric in Operations Suite (formerly Stackdriver) Logging, and then set up an alert to notify you when the number of log lines increases past a threshold.
Correct Answer D
Feedback
D (Correct Answer) – Since you know that there is a burst of log lines you can set up a metric that identifies those lines. Operations Suite (formerly Stackdriver) will also allow you to set up a text, email or messaging alert that can notify promptly when the error is detected so you can hop onto the system to debug.
A – Logging into an individual machine may not see the specific performance problem as multiple machines may be in the configuration and reducing the chances of interacting with an intermittent performance problem.
B – Error reporting won’t necessarily catch the log lines unless they are stack traces in the proper format. Additionally, just because there is a pattern doesn’t mean you will know exactly when and where to log in to debug.
C – Trace may tell you where time is being spent but won’t let you know in on the exact host that the problem is occurring on because you generally only send samples of traces. There is also no alerting on traces to notify exactly when the problem is happening.
Additional Resource
https://cloud.google.com/logging/docs/logs-based-metrics/
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