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Storage access support for soft real-time applications

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2 Author(s)
Wu, J.C. ; Dept. of Comput. Sci., California Univ., Santa Cruz, CA, USA ; Brandt, S.A.

Most research on QoS-aware storage has focused on the use of QoS-aware disk schedulers. However, the increasing intelligence and autonomy of modern disk drives have made fine-grained external disk scheduling difficult. As this trend continues, providing QoS-aware storage through external disk schedulers may become infeasible in the future. In this paper, we present a coarse-grained approach to storage bandwidth management that does not rely on external disk schedulers. The goal is to provide better storage access support for storage-bound soft real-time applications. Our approach gives priority to disk requests generated by soft real-time applications by controlling the rate that best-effort disk requests may be dispatched.

Published in:

Real-Time and Embedded Technology and Applications Symposium, 2004. Proceedings. RTAS 2004. 10th IEEE

Date of Conference:

25-28 May 2004