Improving file system performance and reliability of car digital video recorders

Car digital video recorders (DVRs) store realtime audio/video data at flash memory storage device. Car DVR should handle a large amount of high quality multimedia data with high reliability. However, current file systems are vulnerable to sudden-power-offs and flash memory errors. This paper propose...

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Bibliographic Details
Published in:IEEE transactions on consumer electronics 2015-05, Vol.61 (2), p.222-229
Main Authors: Kim, Younghun, Shin, Dongkun
Format: Article
Language:English
Subjects:
Car digital video recorder
Cluster allocation
FAT file system
File systems
Flash memories
Flash-aware journaling
Performance evaluation
Principal component analysis
Reliability
Resource management
Streaming media
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Summary:Car digital video recorders (DVRs) store realtime audio/video data at flash memory storage device. Car DVR should handle a large amount of high quality multimedia data with high reliability. However, current file systems are vulnerable to sudden-power-offs and flash memory errors. This paper proposes flash-aware cluster allocation techniques and a flash-aware journaling technique. The flash-aware cluster allocation techniques can reduce the probability of file system corruptions and file fragmentations. The flash-aware journaling technique can ensure the file system consistency without significant overheads. Experiments on a simulator and a real system showed that the proposed techniques can prevent file fragmentations and file system corruptions, and they can improve the write performance and lifetime of SD card significantly.
ISSN:0098-3063
1558-4127
DOI:10.1109/TCE.2015.7150597