ÀÛ¼ºÀÏ : 22-08-05 13:48
[½Å±ÔÀÚ·á] µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ý ´Ù¿î·Îµå
 ±Û¾´ÀÌ : ÆÇ°í¾Æ¼º
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µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ý ´Ù¿î·Îµå



µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ý

µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ý°ú °ü·ÃµÈ °úÁ¦¸¦ ¼öÇàÇÏ´Â °úÁ¤À» ÀûÀº ±ÛÀÔ´Ï´Ù. OS_TERM_PRJ


[°úÁ¦ ³»¿ë]
µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ý¿¡´Â FCFS, SSTF, SCAN, C-SCANÀÌ ÀÖ´Ù. ÀÌµé µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ýµé Áß SCAN ¾Ë°í¸®Áò¿¡ ´ëÇؼ­ ´ÙÀ½ Á¶°Ç¿¡ ¸¸Á·Çϵµ·Ï ÇÁ·Î±×·¥À» ÀÛ¼º ÇÑ´Ù.

<Á¶°Ç 1> ÃʱâÀÇ Çìµå ½ÃÀÛ À§Ä¡´Â ÀÓÀÇ·Î Á¤ÇÏ¿©, ¿ä±¸ Å¥´Â Áߺ¹µÇÁö ¾Ê°Ô 0ºÎÅÍ 200»çÀÌÀÇ °ª Áß ÃÖ¼Ò 7¹ø ÀÌ»óÀÇ ÀÓÀÇÀÇ Æ®·¢ Á¤º¸¸¦ °¡Áöµµ·Ï ÇÑ´Ù.(ÀÓÀÇÀÇ ¼ö´Â rand() ÇÔ¼ö¸¦ ÀÌ¿ëÇÑ´Ù.)

<Á¶°Ç 2> ÇØ´ç ¿ä±¸ Å¥ÀÇ Á¤º¸¸¦ ÅëÇØ SCAN µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ýÀÇ ½Ã¹Ä·¹ÀÌ¼Ç »óŸ¦ º¸¿©ÁØ´Ù.

<Á¶°Ç 3> <Á¶°Ç 1,2>¸¦ ÃÖ¼Ò 5ȸ ÀÌ»ó ¹Ýº¹ÇÑ´Ù.

<Á¶°Ç 4> C¾ð¾î·Î ÀÛ¼º

[ÇØ°á ¹æ¹ý]
ÇØ°áÇϱâ À§Çؼ­´Â SCAN AlgorithmÀ» »ç¿ëÇؾßÇϴµ¥ ÀÌ SCAN AlgorithmÀ» Æ÷ÇÔÇÏ°íÀÖ´Â µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ýÀÇ Á¤ÀÇ¿Í ´Ù¸¥ ´Ù¾çÇÑ ±â¹ý, ±×¸®°í SCAN AlgorithmÀ» ¾Ë¾Æ º¸¾Ò½À´Ï´Ù.
*µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ý
:´ëºÎºÐÀÇ ÀÛ¾÷µéÀº ÀûÀç¿Í ÆÄÀÏÀÇ ÀÔÃâ·ÂÀ» ÀüÀûÀ¸·Î µð½ºÅ©¿¡ ÀÇÁ¸ÇϹǷΠµð½ºÅ© 󸮸¦ °¡´ÉÇÑ ÇÑ ºü¸£°Ô ÇÏ´Â °ÍÀÌ Áß¿äÇÏ´Ù. µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ýÀ» »ç¿ëÇÏ¿© Æò±Õ µð½ºÅ© ó¸® ½Ã°£À» Çâ»ó½Ãų ¼ö ÀÖ´Ù.

µ¥ÀÌÅ͸¦ Àаųª ¾µ¶§ ¼Ò¿äµÇ´Â ½Ã°£Àº Ž»ö½Ã°£, ȸÀüÁö¿¬½Ã°£, Àü¼Û½Ã°£µîÀ¸·Î ³ª´©´Âµ¥ ¿¡¼¾¹ÙÈå°°Àº °æ¿ì¿¡´Â Ž»ö½Ã°£Àº ¹°·ÐÀÌ°í ȸÀüÁö¿¬½Ã°£ ±îÁö ÁÙÀ̱â À§Çؼ­ »ç¿ëÇÏ´Â ¹æ¹ýÀÌ°í scan, c-scan, fcfs, sstf, look, c-lookµîÀº Ž»ö½Ã°£À» ÁÙÀ̱â À§ÇÑ °ÍÀÔ´Ï´Ù.

*ȸÀü ½Ã°£À» ÁÙÀÌ´Â ¾Ë°í¸®Áò
Sector Queuing - SLTF (Shortest Latency TIme First)

*Ž»ö½Ã°£, ȸÀü½Ã°£ ÁÙÀÌ´Â ¾Ë°í¸®Áò
¿¡¼¾¹ÙÈå ±â¹ý

*Ž»ö ½Ã°£À» ÁÙÀÌ´Â ¾Ë°í¸®Áò
SCAN Algorithm : ÁÖ»ç Algorithm
C-SCAN Algorithm(Circular - SCAN)
FCFS(First Come Frist Served) : ¼±Âø¼± ó¸®ÇÏ´Â ÇüÅÂÀÇ ¹æ½Ä
SSTF(Short Seek Time First):Çìµå À§Ä¡¿¡ °¡±î¿î ¸ðµç¿ä±¸¸¦ ¸ÕÀú ó¸®ÇÏ´Â ¹æ½Ä
LOOK Scheduling : ÀüüÀûÀ¸·Î ÁÖ»ç ¹æ½Ä°ú °°À¸³ª ½ÇÁ¦·Î´Â º¸Åë Çìµå´Â °¢ ¹æÇâÀ¸·Î ¿äû¿¡ µû¸£´Â °Å¸®¸¸Å­¸¸ À̵¿ÇÏ°í, ÇöÀç ¹æÇâ¿¡¼­ ´õ ÀÌ»ó ¿äûÀÌ ¾ø´Ù¸é ÇìµåÀÇ À̵¿ ¹æÇâÀÌ ¹Ù²î´Â ¹æ½ÄÀ» »ç¿ëÇÏ´Â ½ºÄÉÁÙ¸µ
C-LOOK Scheduling : ÀüüÀûÀ¸·Î ¼øȯ ÁÖ»ç ¹æ½Ä°ú °°À¸³ª, À§¿Í °°À½.


µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ý.hwp µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ý.hwp µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ý.hwp µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ý.hwp µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ý.hwp µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ý.hwp µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ý.hwp µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ý.hwp µð½ºÅ© ½ºÄÉÁÙ¸µ ±â¹ý.hwp
(À̹ÌÁö¸¦ Ŭ¸¯ÇϽøé È®´ë/¹Ì¸®º¸±â¸¦ º¼ ¼ö ÀÖ½À´Ï´Ù.)




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