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An Efficient Flash Translation Layer Considering Temporal and Spacial Localities for NAND Flash Memory Storage Systems

  • Journal of The Korea Society of Computer and Information
  • Abbr : JKSCI
  • 2017, 22(12), pp.9-15
  • DOI : 10.9708/jksci.2017.22.12.009
  • Publisher : The Korean Society Of Computer And Information
  • Research Area : Engineering > Computer Science
  • Received : November 6, 2017
  • Accepted : December 14, 2017
  • Published : December 29, 2017

Yong-Seok Kim 1

1강원대학교

Accredited

ABSTRACT

This paper presents an efficient FTL for NAND flash based SSDs. Address translation information of page mapping based FTLs is stored on flash memory pages and address translation cache keeps frequently accessed entries. The proposed FTL of this paper reduces response time by considering both of temporal and spacial localities of page access patterns in translation cache management. The localities of several well-known traces are evaluated and determine the structure of the cache for high hit ratio. A simulation with several well-known traces shows that the presented FTL reduces response time in comparison to previous FTLs and can be used with relatively small size of caches.

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