面向非易失存储器的一站式存储访问模型及技术研究

项目名称： 面向非易失存储器的一站式存储访问模型及技术研究

项目编号： No.61472153

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 自动化技术、计算机技术

项目作者： 陈俭喜

作者单位： 华中科技大学

项目金额： 80万元

中文摘要： 新型非易失性存储器因其既具有接近内存的读写性能又具有类似磁盘的持久存储特性而被视为解决存储墙问题的一大利器，但传统的基于慢速磁盘和基于非持久化内存的存储访问、管理模式均不适合新型非易失性存储器。前者存储访问路径过于冗长，软件开销巨大，后者不支持存储持久化，而且不易屏蔽当前非易失性存储器的某些缺陷。本项目针对新型非易失性存储器，研究构建面向新型非易失性存储器的基于对象的一站式存储访问模型与技术。项目采用基于对象的存储访问与管理接口，实现存储访问与存储管理路径分离；通过软硬件结合的方式实现对非易失性存储器一站式存储访问；并通过对象存储接口屏蔽非易失性存储器的缺陷，在对象内部实现诸如磨损均衡、读写不对称屏蔽、并行调度等基于硬件的优化策略。这些方法和技术可缩短存储路径，同时掩盖了非易失性存储器的缺陷，充分发挥其性能优势，实现对其快速高效地存储访问，以期打破存储墙，释放系统潜能

中文关键词： 非易失性存储器；对象存储；访问模型；存储架构

英文摘要： The emerging Non-Volatile Memory (NVM) combines the features of persistency as disk and high performance as DRAM. NVM can be used as both persistent storage and memory. It is a good candidate to break the Storage Wall in current computer systems. But traditional storage system is designed for slow disks and memory system is designed based on non-persistent DRAM. Storage access path is very long and software overhead is huge in the former system while the latter does not support persistent storage and not easy to mask defects of NVM. Both of them are not suitable for the emerging non-volatile memory. To overcome these problems, this project will study the mode and technologies of object-based one-stop storage access for the emerging non-volatile memory. The paths of storage access and management are separated by an object-based interface. A one-stop shortcut storage access mode will be built by the cooperation of software and hardware. Some optimizations for NVM, such as wear leveling, balancing the asymmetric read and write, improving the parallelism of hardware and software, can be implemented inside the object controller transparently. These methods and techniques can shorten the I/O path and mask the defects of non-volatile memory, which will full develop the high performance of NVM and achieve rapid I/O access and efficient storage. By full leveraged the advantage of emerging non-volatile memory, the Storage Wall will be break and more system potential will be released.

英文关键词： Non-Volatile Memory;Object Storage;Access Mode;Storage Architecture