LISA 2002 - Technical Program Abstract
A Simple Way to Estimate the Cost of Downtime
David A. Patterson - University of California at
Pp. 185-188 of the Proceedings of LISA '02:
Sixteenth Systems Administration Conference,
USENIX Association, 2002).
Systems that are more dependable and less expensive to maintain
may be more expensive to purchase. If ordinary customers cannot
calculate the costs of downtime, such systems may not succeed because
it will be difficult to justify a higher price. Hence, we propose an
easy-to-calculate estimate of downtime.
As one reviewer commented, the cost estimate we propose ``is
simply a symbolic translation of the most obvious, common sense
approach to the problem.'' We take this remark as a complement, noting
that prior work has ignored pieces of this obvious formula.
We introduce this formula, argue why it will be important to have
a formula that can easily be calculated, suggest why it will be hard
to get a more accurate estimate, and give some examples.
Widespread use of this obvious formula can lay a foundation for
systems that reduce downtime.
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