A Hybrid Flash Translation Layer with Adaptive Merge for SSDs

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The Flash Translation Layer (FTL) in Solid-State Disks (SSDs) maps logical addresses to physical addresses for disk drive virtualization. In order to reduce garbage collection overhead, we propose full associative striped block-level mapping. In addition, an adaptive merge is proposed to avoid excessive data block reconstructions during garbage collection. With these mechanisms, the write latency is improved up to 78% in comparison with the previous multichannel hybrid FTLs in a sample PC trace. The performance improvements stem from 52% reduced garbage collection.
Publisher
ASSOC COMPUTING MACHINERY
Issue Date
2011-05
Language
English
Article Type
Article
Citation

ACM TRANSACTIONS ON STORAGE, v.6, no.4

ISSN
1553-3077
DOI
10.1145/1970338.1970339
URI
http://hdl.handle.net/10203/99033
Appears in Collection
EE-Journal Papers(저널논문)
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