Á¤º¸°úÇÐȸ ÄÄÇ»ÆÃÀÇ ½ÇÁ¦ ³í¹®Áö (KIISE Transactions on Computing Practices)
Current Result Document :
ÇѱÛÁ¦¸ñ(Korean Title) |
SSD¿¡¼ÀÇ TRIM ¸í·É¾î ó¸® ¼º´É ºÐ¼® ¹× Ext4 ÆÄÀÏ ½Ã½ºÅÛÀ¸·ÎÀÇ Àû¿ë |
¿µ¹®Á¦¸ñ(English Title) |
An Analysis on the Performance of TRIM Commands on SSDs and its Application to the Ext4 File System |
ÀúÀÚ(Author) |
¼ÕÈ¿ºÀ
ÀÌ¿µÀç
±è¿ë¼®
±èÁø¼ö
Hyobong Son
Youngjae Lee
Yongserk Kim
Jin-Soo Kim
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¿ø¹®¼ö·Ïó(Citation) |
VOL 21 NO. 01 PP. 0052 ~ 0057 (2015. 01) |
Çѱ۳»¿ë (Korean Abstract) |
º» ³í¹®¿¡¼´Â SSDÀÇ TRIM ¸í·É¾î ó¸® ¼º´ÉÀ» LBA ¹üÀ§ÀÇ Æ¯¼º ¹× °³¼ö¿¡ µû¶ó ºÐ¼®ÇÏ°í, ±× °á°ú¸¦ ¹ÙÅÁÀ¸·Î Ext4 ÆÄÀÏ ½Ã½ºÅÛ¿¡¼ÀÇ TRIM ¸í·É¾î ó¸® ¼º´ÉÀ» °³¼±ÇÏ¿´´Ù. ´ëºÎºÐÀÇ SSD¿¡¼ LBA ¹üÀ§ÀÇ Å©±â°¡ Å©°í, ¼½ÅÍ ¹øÈ£°¡ Á¤·Ä ¹× ¿¬¼ÓµÇ¾î ÀÖÀ¸¸ç, ÇϳªÀÇ TRIM ¸í·É¾î·Î ´Ù¼öÀÇ LBA ¹üÀ§ Á¤º¸¸¦ Àü´ÞÇÒ¼ö·Ï TRIM ¸í·É¾îÀÇ Ã³¸® ¼º´ÉÀÌ Áõ°¡ÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ÇÑÆí, ±âÁ¸ÀÇ Ext4 ÆÄÀÏ ½Ã½ºÅÛÀº ÀÌ¿Í °°ÀÌ ´Ù¼öÀÇ LBA ¹üÀ§ Á¤º¸¸¦ Àü´ÞÇÒ ¶§ ±× ¼º´ÉÀÌ ´õ ³ôÀ½¿¡µµ ºÒ±¸ÇÏ°í, ÇϳªÀÇ TRIM ¸í·É¾î ´ç ÇϳªÀÇ LBA ¹üÀ§ Á¤º¸¸¸ Àü´ÞÇÏ´Â ¹®Á¦Á¡À» °¡Áö°í ÀÖ´Ù. À̸¦ ÇØ°áÇϱâ À§ÇØ ÇϳªÀÇ TRIM ¸í·É¾î·Î ÃÖ´ë 64°³ÀÇ LBA ¹üÀ§ Á¤º¸¸¦ Àü´ÞÇϵµ·Ï Ext4 ÆÄÀÏ ½Ã½ºÅÛÀ» °³¼±ÇÏ¿´°í, Filebench¸¦ ÀÌ¿ëÇÑ ¼º´É Æò°¡¿¡¼ ÆÄÀÏ »èÁ¦ ¼º´ÉÀÌ ÃÖ´ë 35% Áõ°¡ÇÏ´Â °ÍÀ» È®ÀÎÇÏ¿´´Ù.
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¿µ¹®³»¿ë (English Abstract) |
In this paper, we analyze the performance of the TRIM commands on various SSDs and, based on our analysis results, we enhance the performance of these TRIM commands in the Ext4 file system. We observed that the performance of the TRIM commands improves as the size of the LBA-range increases, the sector number is aligned and continuous or more LBA-ranges are notified via a single TRIM command. However, although the performance is better when multiple LBA-ranges are informed by a single TRIM command, the Ext4 file system issues a single TRIM command for every LBA-range. In this paper, we modify the Ext4 file system to convey at most 64 LBA-ranges per TRIM command. Evaluations through Filebench show that the performance of file deletion operations is improved by up to 35%.
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Å°¿öµå(Keyword) |
°íü »óÅ µð½ºÅ©
³½µå Ç÷¡½Ã ¸Þ¸ð¸®
TRIM ¸í·É¾î
Ext4 ÆÄÀÏ ½Ã½ºÅÛ
solid state drive
NAND flash memory
TRIM command
Ext4 file system
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ÆÄÀÏ÷ºÎ |
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