DocumentCode :
3419437
Title :
A new flash memory management for flash storage system
Author :
Kim, Han-Joon ; Lee, Sang-goo
Author_Institution :
Dept. of Comput. Sci., Seoul Nat. Univ., South Korea
fYear :
1999
fDate :
1999
Firstpage :
284
Lastpage :
289
Abstract :
Proposes a new way of managing flash memory space for flash memory-specific file systems based on a log-structured file system. Flash memory has attractive features such as non-volatility and fast I/O speed, but it also suffers from an inability to update in place, and limited usage cycles. These drawbacks require many changes to conventional storage (file) management techniques. Our focus is on lowering the cleaning cost and evenly utilizing flash memory cells while maintaining a balance between these two often-conflicting goals. The cleaning efficiency is enhanced by dynamically separating cold data and non-cold data. The second goal, cycle leveling, is achieved to the degree where the maximum difference between erase cycles is below the error range of the hardware. Simulation results show that the proposed method has a significant benefit over naive methods: a maximum of 35% reduction in the cleaning cost with evenly-spread writes across segments
Keywords :
flash memories; storage management; I/O speed; cleaning cost; cleaning efficiency; cold data; cycle leveling; erase cycles; evenly-spread writes; file management; flash memory cell utilization; flash memory management; flash memory-specific file systems; flash storage system; hardware error range; in-place updating; log-structured file system; noncold data; nonvolatile solid-state memory; simulation; storage management; usage cycles; Cleaning; Computer science; Costs; File systems; Flash memory; Flash memory cells; Hardware; Memory management; Nonvolatile memory; Solid state circuits;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Computer Software and Applications Conference, 1999. COMPSAC '99. Proceedings. The Twenty-Third Annual International
Conference_Location :
Phoenix, AZ
ISSN :
0730-3157
Print_ISBN :
0-7695-0368-3
Type :
conf
DOI :
10.1109/CMPSAC.1999.812717
Filename :
812717
Link To Document :
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