Prediction of Disk Arm Movements in Anticipation of Future Requests
نویسنده
چکیده
Algorithms for performing predictive movements of the disk arm in anticipation of future requests, aimed at reducing the disk access time, are described in this paper. The prediction is based on the past history of the requested disk tracks . A continuum of optimization algorithms have been derived, featuring di erent prediction performance and, hence, di erent complexities. Trace driven simulations have shown that relative seek time reduction from about 11% to 23% for a workstation workload can be obtained using anticipatory movements.
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