April 2020
Intermediate to advanced
102 pages
2h 23m
English
Content preview from SLO Adoption and Usage in Site Reliability Engineering
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Chapter 1. SLOs: The Magic Behind SRE
As one might gather from the name, Site Reliability Engineering (SRE) prioritizes system reliability.1 Ben Treynor Sloss, Google’s vice president of 24/7 operations, who coined the term SRE, says reliability is the most vital feature of any service. If a system is not available and reliable, customers cannot use it, and the value the product provides diminishes.
No matter where your organization is in adopting SRE methodology, establishing service level objectives (SLOs) is a core best practice that organizations cannot overlook or put off until the future. SLOs safeguard the reliability of your service, and your customers likely will not be happy unless your service is reliable. SLOs set an explicit threshold for how reliable your service should be, which provides all stakeholders within an organization—executives, Site Reliability Engineers, developers, product managers, and operations teams—a common language for measuring service reliability and quality goals.
Thoughtfully constructed, customer-centric, and continuously improved-upon SLOs benefit the entire business. Think of SLOs as goals used to measure success, and service level indicators (SLIs) as the direct metrics of the service’s performance that inform whether the service is meeting the SLO. In other words, SLIs tell you good events from bad events. SLOs tell you what proportion of good/bad events is acceptable, all in support of organizational goals.
Organizations must define ...
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