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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸°úÇÐȸ ³í¹®Áö > Á¤º¸°úÇÐȸ ³í¹®Áö C : ÄÄÇ»ÆÃÀÇ ½ÇÁ¦

Á¤º¸°úÇÐȸ ³í¹®Áö C : ÄÄÇ»ÆÃÀÇ ½ÇÁ¦

Current Result Document : 6 / 9 ÀÌÀü°Ç ÀÌÀü°Ç   ´ÙÀ½°Ç ´ÙÀ½°Ç

ÇѱÛÁ¦¸ñ(Korean Title) Ä¿³ÎÀÇ ¹Ì¸®Àб⸦ °í·ÁÇÑ ¾ÐÃàÆÄÀϽýºÅÛÀÇ Àб⼺´ÉÇâ»ó
¿µ¹®Á¦¸ñ(English Title) Improving the Read Performance of Compressed File Systems Considering Kernel Read-ahead Mechanism
ÀúÀÚ(Author) ¾È¼º¿ë   Çö½Âȯ   °í °Ç   Sungyong Ahn   SeungHwan Hyun   Kern Koh  
¿ø¹®¼ö·Ïó(Citation) VOL 16 NO. 06 PP. 0678 ~ 0682 (2010. 06)
Çѱ۳»¿ë
(Korean Abstract)
¾ÐÃàÆÄÀϽýºÅÛÀº ºñ¿ëÈ¿À²¼ºÀ» ³ôÀ̱â À§ÇØ ¸ð¹ÙÀÏ ÀåÄ¡ °³¹ß¿¡ ÀÚÁÖ »ç¿ëµÈ´Ù. ±×·¯³ª ¾ÐÃàÆÄÀϽýºÅÛÀº ºñ¾ÐÃàÆÄÀϽýºÅÛ¿¡ ºñÇØ Àб⠼º´ÉÀÌ ¶³¾îÁø´Ù´Â ´ÜÁ¡ÀÌ ÀÖ´Ù. ¾ÐÃàÆÄÀϽýºÅÛÀÇ Àб⼺´ÉÀúÇÏÀÇ ¿øÀÎ Áß Çϳª´Â Ä¿³Î ÀÇ ¹Ì¸®Àб⠱â¹ýÀÌ´Ù. ÁÖµÈ ÀÌÀ¯´Â ¾ÐÃàÆÄÀϽýºÅÛÀÇ ¾ÐÃàÇØÁ¦ ¿À¹öÇìµå·Î ÀÎÇØ ¹Ì¸®Àб⠹̽ºÆгÎƼ°¡ ³Ê¹« Å©±â ¶§¹®ÀÌ´Ù. ÀÌ ¹®Á¦¸¦ ÇØ°áÇϱâ À§ÇØ º» ³í¹®¿¡¼­´Â Ä¿³ÎÀÇ ¹Ì¸®Àб⠱â¹ýÀ» °í·ÁÇÑ ¾ÐÃàÆÄÀϽýºÅÛÀÇ Àбâ±â¹ýÀ» Á¦¾ÈÇÑ´Ù. Á¦¾ÈµÈ ±â¹ýÀº bulk read¸¦ ÅëÇØ ÀúÀåÀåÄ¡ÀÇ ¼º´ÉÀ» Çâ»ó½ÃÅ°´Â µ¿½Ã¿¡ ¼±ÅÃÀû ¾ÐÃàÇØÁ¦¸¦ ÅëÇØ ¾ÐÃàÆÄÀÏ ½Ã½ºÅÛÀÇ ¾ÐÃàÇØÁ¦ ¿À¹öÇìµå¸¦ ÁÙÀδÙ. ¿ì¸®´Â ¸®´ª½º ±â¹Ý ½Ã½ºÅÛ¿¡¼­ ³Î¸® »ç¿ëµÇ´Â ¾ÐÃàÆÄÀϽýºÅÛÀÎ CramFS¸¦ ¼öÁ¤ÇÏ¿© Á¦¾ÈµÈ ±â¹ýÀ» ±¸ÇöÇÏ¿´À¸¸ç ¼º´ÉÃøÁ¤ ½ÇÇèÀ» ÅëÇØ Á¦¾ÈµÈ ±â¹ýÀÌ ¾ÐÃàÆÄÀϽýºÅÛÀÇ ¸ÞÀÌÀú ÆäÀÌÁö ÆúÆ® ó¸® ½Ã°£À» ¾à 28%±îÁö ´ÜÃà½Ãų ¼ö ÀÖÀ½À» º¸¿´´Ù.
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(English Abstract)
Compressed filesystem is frequently used in the embedded system to increase cost efficiency. One of the drawbacks of compressed filesystem is low read performance. Moreover, read-ahead mechanism that improves the read throughput of storage device has negative effect on the read performance of compressed filesystem, increasing read latency. Main reason is that compressed filesystem has too big read-ahead miss penalty due to decompression overhead. To solve this problem, this paper proposes new read technique considering kernel read-ahead mechanism for compressed filesystem. Proposed technique improves read throughput of device by bulk read from device and reduces decompression overhead of compressed filesystem by selective decompression. We implement proposed technique by modifying CramFS and evaluate our implementation in the Linux kernel 2.6.21. Performance evaluation results show that proposed technique reduces the average major page fault handling latency by 28%.
Å°¿öµå(Keyword) ¾ÐÃàÆÄÀϽýºÅÛ   ¿î¿µÃ¼Á¦   ¹Ì¸®Àб⠠ ³»ÀåÇü½Ã½ºÅÛ   Compressed Filesystem   Operating System   Read-ahead Mechanism   Embedded System  
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