Effective Memory Use in a Media Server
VLDB '97 Proceedings of the 23rd International Conference on Very Large Data Bases
Storage and retrieval of compressed video
Storage and retrieval of compressed video
Hibernator: helping disk arrays sleep through the winter
Proceedings of the twentieth ACM symposium on Operating systems principles
Energy-aware data prefetching for multi-speed disks
Proceedings of the 3rd conference on Computing frontiers
Measurement and analysis of a streaming-media workload
USITS'01 Proceedings of the 3rd conference on USENIX Symposium on Internet Technologies and Systems - Volume 3
Saving disk energy in video servers by combining caching and prefetching
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP) - Special issue of best papers of ACM MMSys 2013 and ACM NOSSDAV 2013
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Energy consumption is an important issue in data centers, and disks use a significant proportion of the total energy. A promising approach to reducing disk energy consumption is to use multi-speed disks with lower rotational speeds. But changing the speed requires a significant time, which reduces the number of viable opportunities to decrease the disk speed. We propose a new energy-aware data prefetching scheme for multi-speed disks in video servers. We start by examining the power and performance characteristics of multi-speed disks. We then analyze the disk bandwidth and buffer requirements needed for jitter-free speed transitions and propose a new data prefetching scheme to extend the time that disks stay at low speed. The effectiveness of the proposed scheme is evaluated through simulations.