System and method for measuring the performance of a data processing system

摘要

The availability of a data processing system is measured on the basis of availability of each function of the system separately, rather than availability of specific machines or sub-systems. Also, aggregate availability figures are computed using weighting factors reflecting the importance of each function to the overall operation, and the relative quantity of usage of the function during different times of the day or week. Controllable interruptions in service such as for maintenance, are scheduled so as to ensure the availability of sufficient facilities for performing each function.