高级检索
    王国华, 杜宏章, 吴凤刚, 刘石勇. 高密度磁记录技术研究综述[J]. 计算机研究与发展, 2018, 55(9): 2016-2028. DOI: 10.7544/issn1000-1239.2018.20180264
    引用本文: 王国华, 杜宏章, 吴凤刚, 刘石勇. 高密度磁记录技术研究综述[J]. 计算机研究与发展, 2018, 55(9): 2016-2028. DOI: 10.7544/issn1000-1239.2018.20180264
    Wang Guohua, David Hung-Chang Du, Wu Fenggang, Liu Shiyong. Survey on High Density Magnetic Recording Technology[J]. Journal of Computer Research and Development, 2018, 55(9): 2016-2028. DOI: 10.7544/issn1000-1239.2018.20180264
    Citation: Wang Guohua, David Hung-Chang Du, Wu Fenggang, Liu Shiyong. Survey on High Density Magnetic Recording Technology[J]. Journal of Computer Research and Development, 2018, 55(9): 2016-2028. DOI: 10.7544/issn1000-1239.2018.20180264

    高密度磁记录技术研究综述

    Survey on High Density Magnetic Recording Technology

    • 摘要: 大数据时代对大容量磁盘的需求日益增长,而在对现有的磁盘不进行较大改动的前提下,叠瓦式磁记录技术SMR是提高磁盘存储容量的最佳选择.近年来,兴起了一种新的磁记录技术——交错式磁记录技术IMR,它可以获得比SMR更高的存储密度和随机写性能.首先介绍了SMR磁盘的内部叠瓦式结构以及由此带来的数据写放大问题,并对缓解数据写放大问题的数据管理方式、性能特性评测以及基于SMR的上层应用系统方面的研究进展进行了概述;然后对新兴的IMR磁盘内部结构及其数据写放大问题进行了介绍,并对其将来的研究方向做了一定的分析和展望;最后对SMR磁盘和IMR磁盘在存储密度、数据写性能等方面进行了比较分析.当前有很多基于SMR磁盘的上层应用系统,这表明SMR磁盘可以高效地替代传统磁盘来构建大型的存储系统,而IMR磁盘的优势也将使其未来的发展前景可期.

       

      Abstract: In the era of big data, the demand for large-capacity disks has been growing. With minimal technology changes to the existing disk head and storage media of hard disks, the shingled magnetic recording (SMR) technology is the best choice to increase the disk storage capacity. The interlaced magnetic recording (IMR) technology is a newly developed technology in recent years, which can achieve higher storage density and random write performance than SMR. In this paper, we first introduce the shingled track layout of SMR drive and the resulting write amplification problem. We also review the data management methods that mitigate write amplification problem, the evaluation of performance characterizations, and the research on SMR-based upper applications. Then we introduce the interlaced track layout of IMR drive and its data write amplification problem. We also analyze the future research topics of IMR drive. Finally, we compare SMR drive and IMR drive from the storage density, random write performance, and other aspects. A variety of SMR-based upper applications, like file system, database, and RAID, prove that SMR drive can be effectively used to replace conventional disks to build large-scale storage systems. The advantages of IMR drive over SMR drive will make it have a bright future.

       

    /

    返回文章
    返回