Balancing disk energy against reliability in video playback
| Autor: | Minseok Song, Wanhyung Ryu, Yeongju Lee, Jeong Seop Sim |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Hardware_MEMORYSTRUCTURES
Computer Networks and Communications Computer science business.industry Real-time computing Disk mirroring Disk sector Hard disk drive performance characteristics Disk controller Disk buffer Disk encryption hardware Disk operating system Hardware and Architecture Data_FILES Media Technology business Software Computer hardware Information Systems Logical disk |
| Zdroj: | Multimedia Systems. 20:25-43 |
| ISSN: | 1432-1882 0942-4962 |
| Popis: | Video files contain large amount of data, which can be stored cost-effectively on a hard disk drive, but this consumes a significant energy when it is spinning and ready to read data. The energy used by a disk can be reduced by prefetching video frames into buffer to allow the disk to spin down. But frequent spindowns compromise disk life, so it is desirable to limit the number of times that the disk spins down. We propose a method of data prefetching that fully utilizes the available buffer while providing continuous video playback. We analyze the effect of the amount of data comprising the frames in the buffer on disk power consumption and formulate algorithms that determine when the disk should enter standby mode and the optimal number of disk spindowns. We implemented our scheme in the Linux 2.6 MPlayer and find that a portable 1.8-inch disk uses between 10 and 37 % less energy than it does with the existing MPlayer. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink