Á¤º¸°úÇÐȸ³í¹®Áö (Journal of KIISE)
ÇѱÛÁ¦¸ñ(Korean Title) |
¸Þ¸ð¸® ÆÄÀÏ ½Ã½ºÅÛ ±â¹Ý °í¼º´É ¸Þ¸ð¸® ¸Ê ÆÄÀÏ ÀÔÃâ·ÂÀ» À§ÇÑ ¸ÅÇΠij½Ã |
¿µ¹®Á¦¸ñ(English Title) |
Mapping Cache for High-Performance Memory Mapped File I/O in Memory File Systems |
ÀúÀÚ(Author) |
±èÁö¿ø
ÃÖÁ¤½Ä
ÇÑȯ¼ö
Jiwon Kim
Jungsik Choi
Hwansoo Han
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¿ø¹®¼ö·Ïó(Citation) |
VOL 43 NO. 05 PP. 0524 ~ 0530 (2016. 05) |
Çѱ۳»¿ë (Korean Abstract) |
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¿µ¹®³»¿ë (English Abstract) |
The desire to access data faster and the growth of next-generation memories such as non-volatile memories, contribute to the development of research on memory file systems. It is recommended that memory mapped file I/O, which has less overhead than read-write I/O, is utilized in a high-performance memory file system. Memory mapped file I/O, however, brings a page table overhead, which becomes one of the big overheads that needs to be resolved in the entire file I/O performance. We find that same overheads occur unnecessarily, because a page table of a file is removed whenever a file is opened after being closed. To remove the duplicated overhead, we propose the mapping cache, a technique that does not delete a page table of a file but saves the page table to be reused when the mapping of the file is released. We demonstrate that mapping cache improves the performance of traditional file I/O by 2.8x and web server performance by 12%.
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Å°¿öµå(Keyword) |
¸Þ¸ð¸® ÆÄÀÏ ½Ã½ºÅÛ
¸Þ¸ð¸® ¸Ê ÆÄÀÏ ÀÔÃâ·Â
ÆäÀÌÁö Å×ÀÌºí ±¸Ãà ¿À¹öÇìµå
¸ÅÇΠij½Ã
memory file system
memory mapped file I/O
page table overhead
mapping cache
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