From the course: Site Reliability Engineering: Service-Level Agreements and Objectives
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Objectives vs. indicators
From the course: Site Reliability Engineering: Service-Level Agreements and Objectives
Objectives vs. indicators
- [Instructor] A service-level objective builds off of a service-level indicator to provide a target level of reliability for a service as customers. It takes the SLI, and adds both a threshold and a time window, making it a metric that can be evaluated at a set cadence. Setting service-level objectives frames service-performance expectations. SLOs have the added side benefit of reducing complaints to service owners about service behavior, for example, users complaining about the service being slow. Additionally, SLOs help prevent both over- and under-utilization of a service. Without an SLO, different individuals may develop their own distinct beliefs about the system's desired performance. Consider the following example. Let's say you have a service that provides cat facts to interested users. You want to update this service to allow users access to even more facts about cats. Well, there's nothing governing whether…
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