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
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Á¤ÀϺ¸
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±èÁöÈ«
Li Xiaochang
Jihong Kim
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¿ø¹®¼ö·Ïó(Citation) |
VOL 47 NO. 08 PP. 0717 ~ 0721 (2020. 08) |
Çѱ۳»¿ë (Korean Abstract) |
SSDÀÇ ¿ë·®ÀÌ Å©°Ô Áõ°¡ÇÏ¸é¼ 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¸ÀÌ¸é¼ PFTL°ú ºñ½ÁÇÑ ¼öÁØÀÇ ¿À¹öÇìµå¸¦ °®µµ·Ï ÁÙ¿´´Ù
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¿µ¹®³»¿ë (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.
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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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