An efficient data layout scheme for multi-disks continuous media servers

Recently, zoning technique has been widely applied to disks to increase the ir capacities. Under the technique, an interesting feature of a disk is tha t there are a number of various bandwidths on it. Herein, a novel data layo ut scheme called cluster-pairing on efficiently exploiting this feature for continuous media (CM) servers is proposed. We first applied track-pairing method between a pair of homogeneous disks, and then partitioned each disk into a same number of clusters to facilitate the retrieval of region-based data placement. The proposed method can take the advantages of track-pairin g and region-based data placement schemes to fully utilize the various band widths from zoned-disks and meanwhile reduce the seek time overhead. Accord ing to the simulation results, the disk throughput after applying our appro ach can be promoted by 35% to 65% than that of the traditional data stripin g strategies, 10% to 30% than that of region-based data placement method, a nd about 10% than that of track-pairing scheme. And the wasted storage spac e is less than 1% which is negligible in terms of the improvement of the di sk throughput.