MOLAR: A Cost-Efficient, High-Performance SSD-Based Hybrid Storage Cache
文献类型：期刊论文
| 作者 | Yi Liu; Xiongzi Ge; Xiaoxia Huang; David H.C. Du |
| 刊名 | The Computer Journal
 |
| 出版日期 | 2015 |
| 英文摘要 | This paper proposes a deMOtion-based, fLash-awARe hybrid storage cache model, named MOLAR, to effectively integrate Flash-based Solid-State Disks (SSDs) into traditional dynamic random access memory (DRAM)-based memory storage systems where SSDs serve as the Tier-2 cache, while DRAM is considered as the Tier-1 cache. We found that conventional cache algorithms designed for DRAM perform poorly in SSDs due to the limited write cycles and asymmetric read/write performance of Flash memory. In MOLAR, a Flash-aware I/O path structure is designed to adapt the asymmetric read and write performance of SSDs and, moreover, to reduce useless write operations. A new control metric, demotion count, is validated to wisely select the evicted blocks from DRAM to reside in the SSD. Besides, for SSD can improve internal data placement from data access hints, the Logical Block Addresses in the SSD are grouped into the long-lived region and the short-lived region self-adaptively via a heuristic control algorithm based on the change of the block demotion count. Through trace-driven simulations, the overall hit ratio in MOLAR outperforms two traditional policies by 1.44–5.34%. The average access latency in SSDs is reduced by 3.5× to 4.5×. Moreover, write amplification is effectively reduced by ∼36% in two typical Flash address-mapping policies. |
| 收录类别 | SCI |
| 原文出处 | http://comjnl.oxfordjournals.org/content/early/2015/01/13/comjnl.bxu156.abstract |
| 语种 | 英语 |
| 源URL | [http://ir.siat.ac.cn:8080/handle/172644/6888]  |
| 专题 | 深圳先进技术研究院_数字所 |
| 作者单位 | The Computer Journal |
| 推荐引用方式 GB/T 7714 | Yi Liu,Xiongzi Ge,Xiaoxia Huang,et al. MOLAR: A Cost-Efficient, High-Performance SSD-Based Hybrid Storage Cache[J]. The Computer Journal,2015. |
| APA | Yi Liu,Xiongzi Ge,Xiaoxia Huang,&David H.C. Du.(2015).MOLAR: A Cost-Efficient, High-Performance SSD-Based Hybrid Storage Cache.The Computer Journal. |
| MLA | Yi Liu,et al."MOLAR: A Cost-Efficient, High-Performance SSD-Based Hybrid Storage Cache".The Computer Journal (2015). |
入库方式： OAI收割
来源：深圳先进技术研究院
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