Abstract: A method for analyzing input/output performance of a data processing system. The method comprises providing records of input/output operations performed by the data processing system. Each record has statistics related to a respective input/output operation for a respective process. One or more workload classes are specified for accumulating statistics, and the statistics from the input/output records are accumulated by workload class. The accumulated statistics are reported by workload class which supports analysis of the input/output behavior for different workload classes.

Abstract: A method for analyzing input/output operations of a data processing system. Input/output trace data of the system is stored in an input/output trace file. The trace file is interactively analyzed by first interactively obtaining data selection criterion and then reading input/output trace data from the trace file in accordance with the selection criterion. The input/output trace data read from the trace file is displayed, and the steps of obtaining the data selection criteria and displaying the trace data are repeated.