A hybrid SSD with PRAM and NAND Flash memory

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• 作者：Gyu Sang Choi^a ; ^{castchoi@ynu.ac.kr}  ; [Author Vitae] ; Ingyu Lee^b ; ^{inlee@troy.edu}  ; [Author Vitae] ; Mankyu Sung^c ; ^{mksung@etri.re.kr}  ; [Author Vitae] ; Choongjae Im^d ; ^{dooly@gw.kmu.ac.kr}  ; [Author Vitae]
• 关键词：Solid-State Drive (SSD) ; Phase-change Memory (PRAM) ; NAND Flash memory ; Flash Translation Layer (FTL) ; Page-level mapping ; Block-level mapping ; Log-based mapping
• 刊名：Microprocessors and Microsystems
• 出版年：2012
• 期刊代码：129_01419331
• 类别：et
• 出版时间：May, 2012
• 卷：36
• 期：3
• 页码：257-266
• 文件大小：1174 K

摘要

The speed of computing processor has been improved dramatically with multi-core architecture. However, the overall computer system performance shows slow improvement because of the sluggish speed of storage system. Several researches have been done to improve the performance of storage system by introducing Solid-State Disk technology with NAND Flash memory. In this paper, we propose new hybrid Solid-State Disk (SSD) architecture to combine Phase-change Memory (PRAM) and NAND Flash memory to achieve high-performance. Our experimental results show that the proposed scheme shows up to 140%performance improvement without endurance problem in PRAM in write-intensive workloads, compared to SSD with only NAND Flash memory.