Cello: a disk scheduling framework for next generation operating systems
SIGMETRICS '98/PERFORMANCE '98 Proceedings of the 1998 ACM SIGMETRICS joint international conference on Measurement and modeling of computer systems
SOSP '01 Proceedings of the eighteenth ACM symposium on Operating systems principles
Cooperative I/O: a novel I/O semantics for energy-aware applications
ACM SIGOPS Operating Systems Review - OSDI '02: Proceedings of the 5th symposium on Operating systems design and implementation
Increasing Disk Burstiness for Energy Efficiency
Increasing Disk Burstiness for Energy Efficiency
Disk scheduling in a multimedia I/O system
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
Modeling Hard-Disk Power Consumption
FAST '03 Proceedings of the 2nd USENIX Conference on File and Storage Technologies
Proceedings of the twentieth ACM symposium on Operating systems principles
Caching for bursts (C-Burst): let hard disks sleep well and work energetically
Proceedings of the 13th international symposium on Low power electronics and design
HDD characterization for A/V streaming applications
IEEE Transactions on Consumer Electronics
A scalable HDD video recording solution using a real-time file system
IEEE Transactions on Consumer Electronics
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Hard-disk drive power consumption reduction methods focus mainly on increasing the amount of time the disk is in standby mode (disk spun down) by implementing aggressive data read-ahead and caching at the operating system and/or application level. However, these methods cannot be applied efficiently to systems with limited memory and high bit-rate requirements such as digital video recorders handling high-definition video. In this paper, we introduce the Audio/Video File System (AVFS), composed of a file system and a disk I/O scheduler. Compared to traditional methods, the proposed scheduler reduces seek overhead by processing real-time requests to video files using batches built dynamically depending on the requests deadlines. Evaluation results show an important reduction in disk utilization rates and a reduction of up to 20 % of the disk power consumption with only 4 MB of data buffer per video stream.