Striping on Disks

Striping on Disks

Phillip K.C. Tse (University of Hong Kong, China)
DOI: 10.4018/978-1-59904-225-1.ch006
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Multimedia streams need continuous data supply. The aggregate data access requirement of many multimedia streams imposes very high demand on the access bandwidth of the storage servers. The disk striping or data striping methods spreads data over multiple disks to provide high aggregate disk throughput (Chua, Li, Ooi, & Tan, 1996; Hsieh, Lin, Liu, Du, & Ruwart, 1995). In addition to the popularity of multimedia objects that we have described in the last chapter, multimedia streams consume an object in a sequential manner. The striping methods make use of this access pattern to evenly spread the workload across disks. This can increase aggregate disk throughput so that high bandwidth streams can be delivered continuously. We first describe the simple striping method that places data stripes on a set of disks in the next section. After that, the staggered striping method that places data on a set of disks in a rotating manner is described. The pseudorandom placement method that stores data stripes on random disks is explained before we summarize this chapter.

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