Adaptive Garbage Collection Technique for Hybrid Flash Memory 


Vol. 15,  No. 6, pp. 335-344, Dec.  2008
10.3745/KIPSTA.2008.15.6.335


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  Abstract

We propose an adaptive garbage collection technique for hybrid flash memory which has both SLC and MLC. Since SLC area is fast and MLC area has low cost, the proposed scheme utilizes the SLC area as log buffer and the MLC area as data block. Considering the high write cost of MLC flash, the garbage collection for the SLC log buffer moves a page into the MLC data block only when the page is cold or the page migration invokes a small cost. The other pages are moved within the SLC log buffer. Also it adjusts the parameter values which determine the operation of garbage collection adaptively considering I/O pattern. From the experiments, we can know that the proposed scheme provides better performance compared with the previous flash management schemes for the hybrid flash and finds the parameter values of garbage collection close to the optimal values.

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[IEEE Style]

S. J. Im and D. K. Shin, "Adaptive Garbage Collection Technique for Hybrid Flash Memory," The KIPS Transactions:PartA, vol. 15, no. 6, pp. 335-344, 2008. DOI: 10.3745/KIPSTA.2008.15.6.335.

[ACM Style]

Soo Jun Im and Dong Kun Shin. 2008. Adaptive Garbage Collection Technique for Hybrid Flash Memory. The KIPS Transactions:PartA, 15, 6, (2008), 335-344. DOI: 10.3745/KIPSTA.2008.15.6.335.

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