Choose the incorrect statement regarding Service Level Objectives (SLOs) and Service Level...
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Choose the incorrect statement regarding Service Level Objectives (SLOs) and Service Level Agreements (SLAs) in Site Reliability Engineering (SRE):
Show answer & explanation
In SRE best practices, SLOs are intentionally set stricter than SLAs to provide a safety margin. SLOs are internal targets that teams commit to meeting, while SLAs are customer-facing commitments. Setting SLOs stricter than SLAs allows teams to maintain the SLA even during minor incidents or degradation. Option B reverses this relationship, making it the incorrect statement.
Step-by-step Derivation:
Analyze each statement: (A) Correct—SLOs are internal engineering targets, SLAs are contractual obligations with penalties. (C) Correct—error budgets are derived from SLO targets (e.g., 99.9% uptime = 43.2 min downtime allowed per month). (D) Correct—SLIs are raw metrics (latency, error rate), used to measure against SLOs. (B) Incorrect—the proper hierarchy is SLA < SLO (stricter); SLOs act as a buffer above SLAs to ensure SLA compliance.