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Difficulty: EasyAligning Technical Service Level Objectives (SLAs/SLOs/SLIs) with Business Objectives

An e-commerce company wants to monitor its online checkout pipeline to align technical metrics with customer satisfaction goals. The product team establishes a target that 99% of valid checkout requests must complete within 200 milliseconds. The operations team configures Google Cloud Monitoring to record the actual, real-time ratio of successful fast requests divided by total requests. Which component of the Site Reliability Engineering (SRE) framework does this real-time measurement metric represent?

  1. A
    Service Level Objective (SLO)
  2. Service Level Indicator (SLI)Answer
  3. C
    Service Level Agreement (SLA)
  4. D
    Error Budget

Answer

Service Level Indicator (SLI)
A Service Level Indicator (SLI) is a quantifiable metric that measures the actual performance of a service in real time, such as the ratio of successful requests to total requests. The target of 99% represents the Service Level Objective (SLO), while the metric measuring real-time compliance is the SLI.

Step-by-Step Solution

1
Identify the performance measurement described in the scenario.
The scenario describes computing the real-time ratio of successful requests divided by total requests.
Determining what specific data is being collected is the first step in SRE metric classification.
2
Differentiate between actual measurement and target threshold.
The target threshold is 99% (SLO), whereas the ratio calculation is the metric measuring actual performance (SLI).
SLIs measure actual behavior, while SLOs define the target threshold for that behavior.

Key Concept

Distinguishing Service Level Indicators (SLIs) from Service Level Objectives (SLOs)
Estimated Time:45s
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Topics

Aligning Technical Service Level Objectives (SLAs/SLOs/SLIs) with Business Objectives