3) Measure task frequencies
Goal: determine relative importance of tasks
- inherently site- and system-specific
Measurement options
- administrator surveys
- logs (machine-generated and human-generated)
Can we keep site and system orthogonal?
- orthogonality simplifies measurement task
- can develop frequency vector before system’s installed
- but, while some frequencies are site-specific . . .
- planned events like backup & upgrade schedules
- . . . others depend on both the site and system
- some systems will require less frequent maintenance than others