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Question 143 - Professional Cloud DevOps Engineer discussion

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You need to create a Cloud Monitoring SLO for a service that will be published soon. You want to verify that requests to the service will be addressed in fewer than 300 ms at least 90% Of the time per calendar month. You need to identify the metric and evaluation method to use. What should you do?

A.
Select a latency metric for a request-based method of evaluation.
Answers
A.
Select a latency metric for a request-based method of evaluation.
B.
Select a latency metric for a window-based method of evaluation.
Answers
B.
Select a latency metric for a window-based method of evaluation.
C.
Select an availability metric for a request-based method of evaluation.
Answers
C.
Select an availability metric for a request-based method of evaluation.
D.
Select an availability metric for a window-based method Of evaluation.
Answers
D.
Select an availability metric for a window-based method Of evaluation.
Suggested answer: A

Explanation:

The correct answer is

A) Select a latency metric for a request-based method of evaluation.

A latency metric measures how responsive your service is to users. For example, you can use the cloud.googleapis.com/http/server/response_latencies metric to measure the latency of HTTP requests to your service1. A request-based method of evaluation counts the number of successful requests that meet a certain criterion, such as being below a latency threshold, and compares it to the number of all requests. For example, you can define an SLI as the ratio of requests with latency below 300 ms to all requests2. A request-based method of evaluation is suitable for measuring performance over time, such as per calendar month. You can set an SLO for the SLI to be at least 90%, which means that you expect 90% of the requests to have latency below 300 ms in a month3.

Creating an SLO | Operations Suite | Google Cloud, Choosing a metric, Latency metric. Concepts in service monitoring | Operations Suite | Google Cloud, Service-level indicators, Request-based SLIs. Learn how to set SLOs -- SRE tips | Google Cloud Blog, Setting SLOs.

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asked 18/09/2024
Kishen Morar
45 questions
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