Improving the Reliability of Next Generation SSDs using WOM-v Codes
summary
Implements non-binary WOM-v codes in the Linux lightNVM/FEMU stack (700 LOC) and adds a QLC extension; evaluates on 800+ real traces and a FEMU-based testbed. Introduces code word sharing to squeeze five program generations from QLC cells (vs four) and a no read mode that keeps cells at the same generation to eliminate read amplification. Shows 4.4x–11.1x reduction in erase cycles across workloads, under 8% write overhead and small tail read penalties.
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chapters (7)
- 0:00Start
- 4:16INPUT DATA
- 5:22Code Word Sharing
- 7:45Implementation
- 9:39Erase Operation Reduction
- 10:26Write Performance
- 11:36Read Performance
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