A Linux administrator is responsible for a critical web application. The company has a formal contract with its customers that promises 99.95% availability, measured monthly. To ensure this promise is met, the administrator configures the monitoring system to alert the team if the application's uptime, as measured by successful HTTP health checks every minute, drops below a 99.98% threshold.
What does this 99.98% threshold represent in service monitoring terminology?
The correct answer is Service-Level Objective (SLO). An SLO is a specific, measurable target for the performance or reliability of a service. In this scenario, the 99.98% uptime is the internal target (the SLO) that the team aims for to ensure they meet the external customer promise (the SLA).
A Service-Level Indicator (SLI) is the actual metric being measured, which in this case is application uptime.
A Service-Level Agreement (SLA) is the formal contract with the customer, which contains the 99.95% availability promise.
A health check is a method used to gather data for the SLI; it is not the target itself.
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