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</div>
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</div>
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<details class="algorithm-comparison">
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<summary>算法特点比较</summary>
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<div class="comparison-content">
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<div class="algorithm-card">
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<h3>FCFS (先来先服务)</h3>
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<ul>
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<li>按请求到达的顺序进行服务</li>
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<li>实现简单,公平</li>
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<li>性能较差,可能造成磁头频繁长距离移动</li>
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<li>不会出现饥饿现象</li>
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</ul>
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</div>
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<div class="algorithm-card">
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<h3>SSTF (最短寻道时间优先)</h3>
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<ul>
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<li>优先处理距离当前磁头最近的请求</li>
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<li>平均寻道时间较短</li>
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<li>可能造成远处请求长时间等待(饥饿)</li>
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<li>局部性能优秀</li>
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</ul>
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</div>
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<div class="algorithm-card">
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<h3>SCAN (电梯算法)</h3>
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<ul>
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<li>按一个方向移动直到末端,再反向移动</li>
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<li>避免了饥饿现象</li>
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<li>对于双向磁盘访问较为公平</li>
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<li>性能介于FCFS和SSTF之间</li>
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</ul>
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</div>
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</div>
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</details>
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<footer class="copyright">
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<p>Copyright © 2024 null. All rights reserved.</p>
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</footer>
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