Multimedia applications impose special requirements on the underlying file system like high bandwidth and real-time delivery. Disk seek has been a significant bottleneck of the file system performance. In this paper, we propose: (1) a new disk layout and data allocation technique called MultimediaOriented Split Allocation (MOSA) which offers a high degree of contiguous allocation for large continuous media (CM) files and allows the coexistence of small, non-CM files, and (2) a new read ahead method called Enhanced-BreadA (EBA) to optimize the input of the I/O request queue. Both techniques aim to increase disk access locality, reduce disk seeks and therefore improve the overall performance of the multimedia file system.
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