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Outline •Problem and Goal •Key Observations •WARM: Write-hotness Aware Retention Management •Results •Conclusion 4 Retention Time Relaxation for Flash Memory
| Content Provider | CiteSeerX |
|---|---|
| Author | Choi, Jongmoo Ghose, Saugata Mutlu, Onur Cai, Yu Luo, Yixin |
| Abstract | •Flash memory can achieve 50x endurance improvement by relaxing retention time using refresh [Cai+ ICCD ’12] •Problem: Refresh consumes the majority of endurance improvement •Goal: Reduce refresh overhead to increase flash memory lifetime •Key Observation: Refresh is unnecessary for write-hot data •Key Ideas of Write-hotness Aware Retention Management (WARM) ‐ Physically partition write-hot pages and write-cold pages within the flash drive ‐ Apply different policies (garbage collection, wear-leveling, refresh) to each group •Key Results ‐ WARM w/o refresh improves lifetime by 3.24x ‐ WARM w / adaptive refresh improves lifetime by 12.9x (1.21x over refresh only) 2 |
| File Format | |
| Access Restriction | Open |
| Content Type | Text |