System and method for estimating combined workloads of systems with uncorrelated and non-deterministic workload patterns

摘要

It has been found that a more reasonable estimation of combined workloads can be achieved by enabling the ability to specify the confidence level in which to estimate the workload values. A method, computer readable medium and system are provided for estimating combined system workloads. The method comprises obtaining a set of quantile-based workload data pertaining to a plurality of systems and normalizing the quantile-based workload data to compensate for relative measures between data pertaining to different ones of the plurality of systems. A confidence interval may then be determined and the confidence interval used to determine a contention probability specifying a degree of predicted workload contention between the plurality of systems according to at least one probabilistic model. The contention probability may then be used to combine workloads for the plurality of systems and a result indicative of one or more combined workloads then provided.

主权项

1. A method for estimating combined system workloads, said method comprising:
obtaining a set of quantile-based workload data pertaining to a plurality of systems; normalizing said quantile-based workload data to generate normalized workload data that compensates for relative measures between data pertaining to different ones of said plurality of systems; determining a confidence level that has been specified to control a degree of conservatism in estimating combined system workloads for said plurality of systems, the specified confidence level being selectable from a plurality of confidence levels each indicative of a proportion of scenarios to be excluded from an analysis in order to vary the degree of conservatism; using said specified confidence level to determine a degree of workload contention between said plurality of systems according to at least one probabilistic model; using said degree of workload contention and said normalized workload data to combine workloads for said plurality of systems; and storing a result indicative of one or more combined workloads according to the specified confidence level.