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| Content Provider | ACM Digital Library |
|---|---|
| Author | Kim, Jin Kyu Lee, Hyung Gyu Bahng, Kyoung Il Choi, Shinho |
| Abstract | NAND flash-based storage is widely used in embedded systems due to its numerous benefits: low cost, high density, small form factor and so on. However, NAND flash-based storage is still suffering from serious performance degradation for random or small size write access. This degradation mainly comes from the physical constraints of NAND flash: erase-before-program and different unit size of erase and program operations. To overcome these constraints, we propose to use PRAM (Phase-change RAM) which supports advanced features: fast byte access capability and no requirement for erase-before-program. In this paper, we focus on developing a high-performance NAND flash-based storage system by maximally exploiting the advanced feature of PRAM, in terms of performance and wearing out. To do this, we first propose a new hybrid storage architecture which consists of PRAM and NAND flash. Second, we devise two novel software schemes for the proposed hybrid storage architecture; FSMS (File System Metadata Separation) and hFTL (hybrid Flash Translation Layer). Finally, we demonstrate that our hybrid architecture increases the performance up to 290% and doubles the lifespan compared to the existing NAND flash only storage systems. |
| Starting Page | 31 |
| Ending Page | 40 |
| Page Count | 10 |
| File Format | |
| ISBN | 9781605584683 |
| DOI | 10.1145/1450058.1450064 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2008-10-19 |
| Publisher Place | New York |
| Access Restriction | Subscribed |
| Subject Keyword | Nand flash File system Pram Flash translation layer (ftl) |
| Content Type | Text |
| Resource Type | Article |
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