本文關(guān)鍵詞： 瓦記錄 瓦記錄轉(zhuǎn)換層 瓦記錄塊 垃圾回收 地址映射　出處：《華中科技大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：伴隨著數(shù)字化進(jìn)程，，對數(shù)字存儲系統(tǒng)容量的需求也在同步增加。而傳統(tǒng)磁盤是信息的最主要的存儲載體之一，但是，受超順磁等效應(yīng)的影響，當(dāng)前磁盤介質(zhì)的面密度也即將達(dá)到上限。瓦記錄存儲技術(shù)的出現(xiàn)，使得磁盤容量的大幅提升成為可能，并可能成為傳統(tǒng)磁盤的替代品。利用強(qiáng)大的通道技術(shù)，通過不改變原有磁性介質(zhì)，而是通過在原有的磁盤寫頭的一側(cè)加入屏蔽層，從而改變其寫操作的磁化范圍，實(shí)現(xiàn)了部分區(qū)域的覆蓋磁化，來提高實(shí)際可磁化的密度。但是，瓦記錄存儲驅(qū)動(dòng)器的隨機(jī)寫性能十分不理想，也成為了制約其普及的因素。 提出了以STL（Shingle Translation Layer，瓦記錄轉(zhuǎn)換層）為核心的方案。提出了將磁盤組織為“區(qū)域”、“瓦記錄塊”及“普通塊”三維結(jié)構(gòu)的方案，提升了瓦記錄磁盤性能。在映射處理過程中分別采用不同的映射策略提升性能。垃圾回收模塊通過特定算法，提高了隨機(jī)性數(shù)據(jù)訪問的回收效率。在數(shù)據(jù)遷移模塊，提出物理區(qū)域劃分，提升了磁盤性能。引入瓦記錄轉(zhuǎn)換層后掩蓋了瓦記錄磁盤不能直接更新的特點(diǎn)，透明支持多種通用文件系統(tǒng)。 仿真和測試結(jié)果表明，STL方案在使瓦記錄磁盤面密度大幅提高的同時(shí)，瓦記錄磁盤隨機(jī)寫性能接近傳統(tǒng)磁盤的25%，連續(xù)寫請求時(shí)表現(xiàn)出較好的性能。
[Abstract]:Along with the digitization process, the demand for the capacity of the digital storage system is also increasing synchronously. The traditional disk is one of the most important storage carriers of information, but it is affected by the effects of superparamagnetism, such as superparamagnetism, and so on. The surface density of current disk media is also about to reach the upper limit. The advent of watt recording storage technology has made it possible to greatly increase disk capacity and may become a substitute for traditional disks. By not changing the original magnetic medium, but by adding a shielding layer to the side of the original disk write head, the magnetization range of its write operation is changed, and the coverage magnetization of some areas is realized, thereby increasing the density of the actual magnetization. The random write performance of the corrugated memory drive is not ideal and has become a constraint to its popularity. Taking STL(Shingle Translation layer as the core, the scheme of organizing the disk into "area", "tile record block" and "ordinary block" is presented. Improved the performance of the tile recording disk. In the process of mapping, we use different mapping strategies to improve the performance. Garbage collection module through a specific algorithm, improve the recovery efficiency of random data access. In the data migration module, Physical area partition is proposed to improve disk performance, and the feature that the tile record disk can not be updated directly is masked by the introduction of the tile record conversion layer, which transparently supports a variety of common file systems. The simulation and test results show that the STL scheme improves the disk surface density greatly, and the random write performance of the tile recording disk is close to that of the traditional disk, which shows good performance when writing requests continuously.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TP333.35

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