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Current Result Document :

ÇѱÛÁ¦¸ñ(Korean Title) SSD FTL ij½Ã ¾Ë°í¸®Áò ºÐ¼® ¹× Á¦¾ð
¿µ¹®Á¦¸ñ(English Title) Analysis and Advice on Cache Algorithms of SSD FTL
ÀúÀÚ(Author) ÀÌÇüºÀ   Á¤ÅÂÀ±   Hyung Bong Lee   Tae Yun Chung  
¿ø¹®¼ö·Ïó(Citation) VOL 12 NO. 01 PP. 0001 ~ 0008It (2023. 01)
Çѱ۳»¿ë
(Korean Abstract)
SSD´Â ÀÌ¹Ì ÇÒ´çµÈ ÆäÀÌÁö¿¡ ´ëÇÑ Á¦ÀÚ¸® µ¤¾î¾²±â°¡ ºÒ°¡´ÉÇϹǷΠ¾²±â ¿¬»êÀÌ ÀÖÀ» ¶§¸¶´Ù »õ·Î¿î Ŭ¸° ÆäÀÌÁö·ÎÀÇ ´ëü°¡ ÇÊ¿äÇÏ´Ù. ÀÌ ¹®Á¦¸¦ Áö¿øÇϱâ À§ÇØ SSD´Â ¿î¿µÃ¼Á¦ÀÇ ÆÄÀϽýºÅÛ¿¡¼­ °ü¸®ÇÏ´Â ³í¸® ÆäÀÌÁö¸¦ ÇöÀç ÇÒ´çµÈ ¹°¸® ÆäÀÌÁö·Î ¸ÅÇÎÇÏ´Â Ç÷¡½Ã º¯È¯ °èÃþÀÎ FTLÀ» ³»ºÎ¿¡ µÐ´Ù. ¾²±â ¿¬»êÀ¸·Î ¹ö·ÁÁø SSD ÆäÀÌÁö´Â ÃʱâÈ­ ÀÛ¾÷À» °ÅÃÄ ÀçÈ°¿ëµÇ¾î¾ß Çϴµ¥, ±× Ƚ¼ö¿¡ Á¦ÇÑÀÌ Àֱ⠶§¹®¿¡ FTLÀº ±âº»ÀÎ ÆäÀÌÁö ¸ÅÇÎ ±â´É ¿Ü¿¡ ¾²±â Ƚ¼ö¸¦ ÁÙÀÏ ¼ö Àִ ij½Ã ±â´ÉÀ» Á¦°øÇÑ´Ù. ÀÌ ¿¬±¸¿¡¼­´Â ¾²±â Ƚ¼ö¸¦ ÁÙÀ̱â À§ÇÑ FTLÀÇ Ä³½Ã ¹æ¹ý·Ð¿¡ ÁýÁßÇÏ¿© °ü·ÃµÈ ¾Ë°í¸®ÁòµéÀ» ºÐ¼®ÇÏ°í, ¾²±â Àü¿ë ij½Ã Àü·«À» Á¦¾ÈÇÑ´Ù. ½Ã¹Ä·¹ÀÌÅ͸¦ »ç¿ëÇÏ¿© ¾²±â Àü¿ë ij½Ã¸¦ ½ÇÇèÇÑ °á°ú ÃÖ´ë 29%ÀÇ °³¼± È¿°ú¸¦ º¸¿´´Ù.
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(English Abstract)
It is impossible to overwrite on an already allocated page in SSDs, so whenever a write operation occurs a page replacement with a clean page is required. To resolve this problem, SSDs have an internal flash translation layer called FTL that maps logical pages managed by a file system of operating system to currently allocated physical pages. SSD pages discarded due to write operations must be recycled through initialization, but since the number of initialization times is limited the FTL provides a caching function to reduce the number of writes in addition to the page mapping function, which is a core function. In this study, we focus on the FTL cache methodologies reducing the number of page writes and analyze the related algorithms, and propose a write-only cache strategy. As a result of experimenting with the write-only cache using a simulator, it showed an improvement of up to 29%.
Å°¿öµå(Keyword) SSD   Ç÷¡½Ã º¯È¯ °èÃþ   LRU   ´Ù°èÃþ¼¿   ¾²±â Àü¿ë ij½Ã   SSD   FTL   LRU   MLC(Multi Level Cell)   Write-only Cache  
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