Remap-SSD: Safely and Efficiently Exploiting SSD Address Remapping to Eliminate...
summary
Remap-SSD implements a remap primitive plus a log-structured byte-addressable NVRAM store for per-remap p2l metadata so l2p/p2l mappings remain consistent even after power loss. Verified on a software SSD emulator and larger simulator across three case studies (intra-SSD dedupe, SQLite redo application, F2FS cleaning), it cuts flash writes by about 45%, boosts bandwidth >20% in redo-heavy workloads, speeds F2FS cleaning by ~28%, and shows up to 90% speedups versus prior flash-log schemes.
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chapters (12)
- 0:00Intro
- 0:31Duplicate Writes are Everywhere
- 0:45Writes Degrade SSD Performance and Lifetime
- 1:02Eliminating Duplicate Writes on Flash
- 2:45Mapping Inconsistency Problem with Remapping
- 4:09Prior Schemes for Mapping Consistency
- 5:38Design Overview of Remap-SSD
- 7:04GC and Power-off Recovery
- 7:43Remapping Metadata Entry
- 8:36Experimental Setup Experimental platforms
- 9:40Case Study: Data Deduplication
- 11:55Conclusion
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