Abstract
High-Performance I/O subsystems have become a must for multimedia systems, such as video servers [15,16,18]. The proposing of the Intelligent I/O (I2O) specifications [11] provides hardware vendors an operating-system-independent architecture in building their solutions for high-performance I/O subsystems. This paper targets one of the most important performance issues in building an I2O RAID-0 device, which is an important I2O implementation. We explore multi-disk scheduling for I2O requests, which are usually associated with soft deadlines to enforce quality-of-service requirements. The idea of Least-Remaining-Request-Size-First (LRSF) is proposed for the request-level multi-disk scheduling with the objective to improve the response-time requirements of I/O sub-systems. The proposed scheduling algorithm is then extended to resolve the starvation problem and for SCAN-like disk services. Finally, we exploit pre-fetching for I2O RAID-0 devices to further improve their performance. The proposed methodologies are verified by a series of experiments using realistic and randomly generated workloads.
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Lo, HW., Kuo, TW., Lam, KY. (2004). Multi-disk Scheduling for High-Performance RAID-0 Devices. In: Chen, J., Hong, S. (eds) Real-Time and Embedded Computing Systems and Applications. RTCSA 2003. Lecture Notes in Computer Science, vol 2968. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-24686-2_27
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DOI: https://doi.org/10.1007/978-3-540-24686-2_27
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