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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸°úÇÐȸ ³í¹®Áö > Á¤º¸°úÇÐȸ³í¹®Áö (Journal of KIISE)

Á¤º¸°úÇÐȸ³í¹®Áö (Journal of KIISE)

Current Result Document :

ÇѱÛÁ¦¸ñ(Korean Title) ¿¬¼Ó¼ºÀ» °í·ÁÇÑ Çؽà ±â¹ÝÀÇ Ç÷¡½Ã º¯È¯ °èÃþ
¿µ¹®Á¦¸ñ(English Title) Sequentiality-Aware Hash-based FTL
ÀúÀÚ(Author) Jaemin Shin   Ilbo Jeong   ½ÅÀç¹Î   Á¤ÀϺ¸   ¸®»þ¿Àâ   ±èÁöÈ«   Li Xiaochang   Jihong Kim  
¿ø¹®¼ö·Ïó(Citation) VOL 47 NO. 08 PP. 0717 ~ 0721 (2020. 08)
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(Korean Abstract)
SSDÀÇ ¿ë·®ÀÌ Å©°Ô Áõ°¡Çϸ鼭 SSDÀÇ ³»ºÎ µ¥ÀÌÅÍ °ü¸®¸¦ À§ÇØ ´õ Å« ¿ë·®ÀÇ DRAMÀÌ ÇÊ¿äÇÏ°Ô µÇ¾ú´Ù. DRAMÀÇ ºñ¿ëÀÌ SSDÀÇ ÀüüÀûÀÎ ºñ¿ëÀ» °áÁ¤ÇÏ´Â Áß¿äÇÑ ¿ä¼ÒÀ̱⠶§¹®¿¡ ¼º´ÉÀÇ °¨¼Ò ¾øÀÌ DRAMÀÇ ºñ¿ëÀ» ÁÙÀÌ´Â °ÍÀÌ Áß¿äÇÏ´Ù. º» ³í¹®¿¡¼­ ¿ì¸®´Â ÀÌ ¸ñÇ¥¸¦ ´Þ¼ºÇÏ´Â »õ·Î¿î Çؽà ±â¹ÝÀÇ ±â¹ýÀ» Á¦¾ÈÇÑ´Ù. ±âÁ¸ÀÇ Çؽà ±â¹Ý¹æ½Ä°ú´Â ´Ù¸£°Ô ¿ì¸®ÀÇ ±â¹ýÀº ³í¸®ÁÖ¼ÒÀÇ ¿¬¼Ó¼ºÀ» È°¿ëÇÏ¿© garbage collection ¿À¹öÇìµå¸¦ È¿°úÀûÀ¸·Î °¨¼Ò½ÃÅ°´Â °¡»óºí·Ï Å×ÀÌºí ±â¹ýÀ» Á¦¾ÈÇÑ´Ù. ½ÇÇè °á°ú´Â SEQhFTLÀÌ Æò±ÕÀûÀ¸·Î PFTLÀÇ 39%¿¡ ÇØ´çÇÏ´Â DRAM »ç¿ë·®À» º¸À̸鼭 PFTL°ú ºñ½ÁÇÑ ¼öÁØÀÇ ¿À¹öÇìµå¸¦ °®µµ·Ï ÁÙ¿´´Ù
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(English Abstract)
As the capacity of an SSD significantly increases, the SSD needs a larger DRAM for managing SSD-internal information. Since the cost of DRAM is an important factor in deciding the overall SSD price, it is important to reduce the DRAM cost without a performance degradation. In this paper, we propose a novel hash-based FTL mapping technique that meets this goal. Unlike an existing hash-based scheme, our technique introduces a virtual block scheme which enables to exploit the sequentiality of the logical address which effectively reduces the garbage collection overhead. Experimental results showed that SEQhFTL can reduce this overhead as much as PFTL while only maintaining 39% of PFTL¡¯s metadata used on average.
Å°¿öµå(Keyword) ij½Ì ±â¹Ý ¹æ½Ä   ÇØ½Ì ±â¹Ý ¹æ½Ä   Ç÷¡½Ã º¯È¯ °èÃþ   °¡ºñÁö Ä÷º¼Ç   caching-based scheme   hash based scheme   flash translation layer   garbage collection   SSD  
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