Electrical computers and digital data processing systems: input/ – Input/output data processing – Peripheral monitoring
Patent
1998-10-13
2000-09-12
Lee, Thomas C.
Electrical computers and digital data processing systems: input/
Input/output data processing
Peripheral monitoring
702182, 702183, 702186, 707101, 709224, 709201, 711100, 711117, G06F 1310, G06F 1134, G06F 1130, G06F 1730, G06F 1760
Patent
active
061191744
ABSTRACT:
The value of a p-quantile of a workload distribution is computed to determine whether a data storage system satisfies a quality-of-service guarantee desired by a client. The quality-of-service guarantee may be a predetermined percentage of a workload being serviced by a device within a predetermined response time. A p-quantile value is set to be equal of the predetermined percentage of the quality-of-service guarantee, and a bound is set to be equal to the predetermined response time. A distribution for the workload arriving at the device during an interval of time equal to the bound is then estimated. It is then determined whether a p-quantile of the workload distribution is less than the bound. In cases where the p-quantile of the workload distribution is computed directly, then the p-quantile of the workload distribution is directly compared to the bound. In cases where the p-quantile of the workload distribution is not computed directly, then the p-quantile of the workload distribution is estimated, with the estimated value the compared to the bound.
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Borowsky Elizabeth L.
Golding Richard A.
Merchant Arif A.
Spasojevic Mirjana
Wilkes John
Hewlett--Packard Company
Lee Thomas C.
Schuster Katharina
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