基于块有效段位图与加速检索的NVM固态盘垃圾回收方法
By using a block-based effective segment map and accelerated retrieval method, the problems of read amplification, latency jitter, and invalid migration in NVM solid-state disk garbage collection are solved, improving garbage collection efficiency and data consistency, and achieving efficient data migration and performance optimization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG WEIMING SEMICONDUCTOR CO LTD
- Filing Date
- 2026-05-08
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, NVM SSDs suffer from read amplification and latency jitter during garbage collection. The imbalance between peak control of mapping table access and bitmap update cost leads to low overall read and write performance and efficiency. Furthermore, frequent overwriting of hot addresses causes uneven distribution of data validity, making it difficult to achieve fine-grained updates.
A method based on block valid segment bitmap and accelerated retrieval is adopted. Failure evidence is accumulated by responding to write requests, and hardware-accelerated logic is used to filter candidate blocks. By comparing the block version stamp with the global commit version, targeted verification and migration are performed, reducing the number of mapping table accesses and improving garbage collection efficiency.
It effectively reduces peak access to the mapping table and the probability of invalid migration, improves the write performance and operational stability of the solid-state drive in scenarios of small block random writes and frequent overwriting of hot addresses, and ensures data consistency and metadata credibility.
Smart Images
Figure CN122152723B_ABST