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As flash memory technologies quickly improve, flash-memory-based storage devices are becoming a viable alternative as a secondary storage solution for general-purpose computing systems such as personal computers and enterprise server systems. Most existing Flash Translation Layer (FTL) schemes are, however, ill-suited for such systems because they were optimized for storage write patterns of embedded systems only. This paper proposes a new flash management technique called LAST which is optimized for access characteristics of general-purpose computing systems. By exploiting the locality of storage access patterns, LAST reduces the garbage collection overhead significantly, thus increasing the I/O performance of flash-based storage devices.
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