Fio was originally written to save me the hassle of writing
special test case programs when I wanted to test a specific
workload, either for performance reasons or to find/reproduce
a bug. The process of writing such a test app can be tiresome,
especially if you have to do it often. Hence I needed a tool
that would be able to simulate a given I/O workload without
resorting to writing a tailored test case again and again.
