Dynamic feedback-based throughput control for black-box storage systems
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United States of America Patent
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May 30, 2017
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app pub date -
May 12, 2016
filing date -
Dec 19, 2013
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Abstract
Embodiments of the present invention relate to dynamic feedback-based throughput control for storage systems. In one embodiment, a method of and computer program product for storage throughput control are provided. A plurality of I/O requests is received at a rate controller. The rate controller comprises a plurality of token buckets. A token bucket is selected from the plurality of token buckets based on a service class of each of the plurality of I/O requests. The plurality of I/O requests is sent from the rate controller to a storage system at a control rate. Throughput of the storage system is observed. The control rate is dynamically adjusted based on the variance between the observed throughput of the storage system and the first rate. Adjusting the control rate includes determining a minimum throughput reservation for each service class, and allocating throughput capacity to each service class proportional to its throughput reservation.
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