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Classifying Data to Reduce Long-Term Data Movement in Shingled Write Disks

机译:对数据进行分类以减少带状写入磁盘中的长期数据移动

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摘要

Shingled magnetic recording (SMR) is a means of increasing the density of hard drives that brings a new set of challenges. Due to the nature of SMR disks, updating in place is not an option. Holes left by invalidated data can only be filled if the entire band is reclaimed, and a poor band compaction algorithm could result in spending a lot of time moving block's over the lifetime of the device. We propose using write frequency to separate blocks to reduce data movement and develop a band compaction algorithm that implements this heuristic. We demonstrate how our algorithm results in improved data management, resulting in an up to 45% reduction in required data movements when compared to naive approaches to band management.
机译:带状磁记录(SMR)是提高硬盘驱动器密度的一种方式,带来了一系列新的挑战。由于SMR磁盘的性质,无法进行就地更新。无效数据遗留的漏洞只有在整个频带都被回收的情况下才能填补,不良的频带紧缩算法可能会导致在设备的整个生命周期内花费大量时间移动模块。我们建议使用写入频率来分离块,以减少数据移动,并开发实现此启发式算法的频带压缩算法。我们展示了我们的算法如何改善数据管理,与单纯的频段管理方法相比,最多可将所需数据移动减少45%。

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