How would you define it?

You are responsible for the reliability of a high-volume enterprise application. A large number of users report that an important subset of the application’s functionality C a data intensive reporting feature C is consistently failing with an HTTP 500 error. When you investigate your application’s dashboards, you notice a strong correlation between the failures and a metric that represents the size of an internal queue used for generating reports. You trace the failures to a reporting backend that is experiencing high I/O wait times. You quickly fix the issue by resizing the backend’s persistent disk (PD) .

How you need to create an availability Service Level Indicator (SLI) for the report generation feature .

How would you define it?
A . As the I/O wait times aggregated across all report generation backends
B . As the proportion of report generation requests that result in a successful response
C . As the application’s report generation queue size compared to a known-good threshold
D . As the reporting backend PD throughout capacity compared to a known-good threshold

Answer: C