Efficient cache design for solid-state drives

Miaoqing Huang, O. Serres, Vikram K. Narayana, T. El-Ghazawi, G. Newby
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引用次数: 13

Abstract

Solid-State Drives (SSDs) are data storage devices that use solid-state memory to store persistent data. Flash memory is the de facto nonvolatile technology used in most SSDs. It is well known that the writing performance of flash-based SSDs is much lower than the reading performance due to the fact that a flash page can be written only after it is erased. In this work, we present an SSD cache architecture designed to provide a balanced read/write performance for flash memory. An efficient automatic updating technique is proposed to provide a more responsive SSD architecture by writing back stable but dirty flash pages according to a predetermined set of policies during the SSD device idle time. Those automatic updating policies are also tested and compared. Simulation results demonstrate that both reading and writing performance are improved significantly by incorporating the proposed cache with automatic updating feature into SSDs.
高效的固态硬盘缓存设计
固态硬盘(ssd)是使用固态内存存储持久数据的数据存储设备。闪存实际上是大多数ssd中使用的非易失性技术。众所周知,基于闪存的ssd硬盘的写入性能比读取性能低得多,因为flash页面必须经过擦除才能写入。在这项工作中,我们提出了一种SSD缓存架构,旨在为闪存提供均衡的读/写性能。提出了一种高效的自动更新技术,通过在SSD设备空闲时按照预先设定的策略回写稳定但脏的闪存页,提供响应更快的SSD架构。对这些自动更新策略进行了测试和比较。仿真结果表明,将具有自动更新特性的缓存集成到ssd中,可以显著提高ssd的读写性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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