‫ﺑﻪ ﻧﺎﻡم ﺧﺪﺍا
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‫ﭘﺮﻭوﮊژﻩه ﺩدﺭرﺱس ﺳﻴﯿﺴﺘﻢﻫﺎﻱﯼیي ﻋﺎﻣﻞ‪ -1‬ﺑﺨﺶ ﺩدﻭوﻡم‬
‫ﺩدﺍاﻧﺸﮕﺎﻩه ﺻﻨﻌﺘﻲﯽ ﺷﺮﻳﯾﻒ ‪ -‬ﺩدﺍاﻧﺸﻜﮑﺪﻩه ﻣﻬﻨﺪﺳﻲﯽ ﻛﮐﺎﻣﭙﻴﯿﻮﺗﺮ‬
‫ﺗﺮﻡم ﺩدﻭوﻡم ﺳﺎﻝل ﺗﺤﺼﻴﯿﻠﻲﯽ ‪93-94‬‬
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‫ﻣﻬﻠﺖ ﺍاﺭرﺳﺎﻝل ﺍاﻳﯾﻦ ﻓﺎﺯز ﭘﺮﻭوﮊژﻩه ‪ 5‬ﺧﺮﺩدﺍاﺩد ﻣﺎﻩه ﺳﺎﻋﺖ ‪ 23:59‬ﻣﻲﯽ ﺑﺎﺷﺪ‪.‬‬
‫ﭘﺎﺳﺦ ﺗﻤﺮﻳﯾﻨﺎﺕت ﺧﻮﺩد ﺭرﺍا ﺑﻪ آﺩدﺭرﺱس ‪ [email protected]‬ﺍاﺭرﺳﺎﻝل ﻧﻤﺎﻳﯾﻴﯿﺪ‪.‬‬
‫ﺩدﻗﺖ ﻛﮐﻨﻴﯿﺪ ﻛﮐﻪ ﭘﺎﺳﺦ ﻫﺎ ﺗﻨﻬﺎ ﺩدﺭر ﻗﺎﻟﺐ ﻳﯾﻚﮏ ﻓﺎﻳﯾﻞ ﻓﺸﺮﺩدﻩه ﺑﻮﺩدﻩه ﻭو ﻧﺎﻡم آﻥن ﻭو ﻋﻨﻮﺍاﻥن ﺍاﻳﯾﻤﻴﯿﻞ ﺍاﺭرﺳﺎﻟﻲﯽ ﺑﺎ ﻓﺮﻣﺖ ‪ P2-StudentID‬ﺍاﺭرﺳﺎﻝل‬
‫ﮔﺮﺩدﺩد‪.‬‬
‫ﭘﺎﺳﺨﻬﺎﻳﯾﻲﯽ ﻛﮐﻪ ﺑﺎ ﺍاﻳﯾﻦ ﻓﺮﻣﺖ ﺍاﺭرﺳﺎﻝل ﻧﺸﻮﻧﺪ ﺩدﺭر ﻫﻨﮕﺎﻡم ﺗﺼﺤﻴﯿﺢ ﺑﺎ ﻣﺸﻜﮑﻞ ﻣﻮﺍاﺟﻪ ﺧﻮﺍاﻫﻨﺪ ﺷﺪ‪.‬‬
‫ﺍاﻳﯾﻦ ﺗﻤﺮﻳﯾﻦ ﺩدﺍاﺭرﺍاﻱﯼیي ﻳﯾﻚﮏ ﺍاﺭرﺍاﻳﯾﻪ ﺣﻀﻮﺭرﻱﯼیي ﻧﻴﯿﺰ ﻣﻲﯽﺑﺎﺷﺪ ﻛﮐﻪ ﺗﺎﺭرﻳﯾﺦ ﺁآﻥن ﻣﺘﻌﺎﻗﺒﺎ ﺍاﻋﻼﻡم ﺧﻮﺍاﻫﺪ ﺷﺪ‪.‬‬
‫ﺍاﺭرﺳﺎﻝل ﭘﺮﻭوﮊژﻩه ﺑﻪ ﺍاﺯزﺍاﻱﯼیي ﻫﺮ ﺭرﻭوﺯز ﺗﺎﺧﻴﯿﺮ ﺷﺎﻣﻞ ‪ ٪25‬ﻛﮐﺴﺮ ﻧﻤﺮﻩه ﺧﻮﺍاﻫﺪ ﺷﺪ ﻭو ﺑﻌﺪ ﺍاﺯز ﺳﻪ ﺭرﻭوﺯز ﺑﻪ آﻥن ﻧﻤﺮﻫﺎﻱﯼیي ﺗﻌﻠﻖ ﻧﻤﻲﯽﮔﻴﯿﺮﺩد‪.‬‬
‫ﺩدﺭر ﺻﻮﺭرﺕت ﺷﺒﺎﻫﺖ ﺗﻤﺮﻳﯾﻨﺎﺕت ﺍاﺭرﺳﺎﻟﻲﯽ ﻭو ﺍاﺣﺮﺍاﺯز ﺭرﻭوﻧﻮﺷﺖ ﺑﻮﺩدﻥن آﻧﻬﺎ ﺑﺮﺍاﻱﯼیي ﻫﺮ ﺩدﻭو ﻧﻔﺮ ﻧﻤﺮﻩه ﺻﻔﺮ ﺩدﺭر ﻧﻈﺮ ﮔﺮﻓﺘﻪ ﻣﻲﯽﺷﻮﺩد‪.‬‬
‫ﺗﻮﺿﻴﯿﺤﺎﺕت ﺗﻜﮑﻤﻴﯿﻠﻲﯽ ﺩدﺭر ﻣﻮﺭرﺩد ﭼﮕﻮﻧﮕﻲﯽ ﺍاﻧﺠﺎﻡم ﻭو ﺗﺤﻮﻳﯾﻞ ﺍاﻳﯾﻦ ﭘﺮﻭوﮊژﻩه ﺩدﺭر ﺭرﻭوﺯز ‪ 12‬ﺍاﺭرﺩدﻳﯾﺒﻬﺸﺖ ﺩدﺭر ﻛﮐﻼﺱس ‪ 103‬ﺳﺎﻋﺖ ‪ 12-13:30‬ﺩدﺍاﺩدﻩه‬
‫ﺧﻮﺍاﻫﺪ ﺷﺪ‪.‬‬
‫ﻫﺮﮔﻮﻧﻪ ﺳﻮﺍاﻝل ﻳﯾﺎ ﺍاﺑﻬﺎﻡم ﺧﻮﺩد ﺭرﺍا ﺑﻪ ﺍاﻳﯾﻤﻴﯿﻞ ‪ [email protected] | [email protected]‬ﺍاﺭرﺳﺎﻝل ﻛﮐﻨﻴﯿﺪ‪.‬‬
‫ﺗﻮﺿﻴﯿﺤﺎﺕت‪:‬‬
‫ﺩدﺭر ﺳﻴﯿﺴﺘﻢﻫﺎﻱﯼیي ﻋﺎﻣﻞ‪ ،‬ﻳﯾﻜﮑﻲﯽ ﺍاﺯز ﺍاﻫﺪﺍاﻑف ﺍاﺻﻠﻲﯽ ﺯزﻣﺎﻧﺒﻨﺪﻱﯼیي ﺑﻴﯿﻦ ﭘﺮﺩدﺍاﺯزﻩهﻫﺎ ﻣﻲﯽﺑﺎﺷﺪ ﺑﻄﻮﺭرﻱﯼیي ﻛﮐﻪ ﭘﺮﺩدﺍاﺯزﻩهﻫﺎﻱﯼیي ﺑﺎ ﺍاﻭوﻟﻮﻳﯾﺖ ﺑﺎﻻ ﺯزﻣﺎﻥن ﺩدﺭر ﺍاﻧﺘﻈﺎﺭر ﻛﮐﻤﺘﺮﻱﯼیي ﺩدﺍاﺷﺘﻪ‬
‫ﺑﺎﺷﻨﺪ ﻭو ﺍاﺯز ﺳﻤﺖ ﺳﺨﺖﺍاﻓﺰﺍاﺭر ﺯزﻭوﺩدﺗﺮ ﺧﺪﻣﺖ ﺩدﺭرﻳﯾﺎﻓﺖ ﻛﮐﻨﻨﺪ‪ .‬ﺍاﺯز ﺩدﻳﯾﮕﺮ ﻛﮐﺎﺭرﻫﺎﻱﯼیي ﺳﻴﯿﺴﺘﻢﻋﺎﻣﻞ ﺍاﻳﯾﺠﺎﺩد ﺩدﺍاﻳﯾﺮﻛﮐﺘﻮﺭرﻱﯼیي ﺑﺮ ﺭرﻭوﻱﯼیي ﻣﻨﺎﺑﻊ ﺫذﺧﻴﯿﺮﻩه ﺷﺪﻩه ﺭرﻭوﻱﯼیي ﺳﻴﯿﺴﺘﻢ‬
‫ﺍاﺳﺖ ﻛﮐﻪ ﺑﻪ ﺍاﻳﯾﻦ ﺧﺪﻣﺖ ‪ File System‬ﮔﻔﺘﻪ ﻣﻲﯽﺷﻮﺩد‪.‬‬
‫ﭘﺮﻭوﮊژﻩهﻱﯼیي ﭘﺎﻳﯾﺎﻧﻲﯽ ﺩدﺭرﺱس ﺳﻴﯿﺴﺘﻢﻋﺎﻣﻞ ﺩدﺍاﺭرﺍاﻱﯼیي ‪ 3‬ﺑﺨﺶ ﺍاﺳﺖ‪ .‬ﺩدﺭر ﺑﺨﺶ ﺍاﻭوﻝل ﺑﻪ ﺗﺤﻠﻴﯿﻞ ﻭو ﺑﺮﺭرﺳﻲﯽ ﺍاﻟﮕﻮﺭرﻳﯾﺘﻢﻫﺎﻱﯼیي ﺯزﻣﺎﻧﺒﻨﺪﻱﯼیي ‪ FreeBSD‬ﭘﺮﺩدﺍاﺧﺘﻪ ﻣﻲﯽﺷﻮﺩد‪ .‬ﺩدﺭر‬
‫ﺑﺨﺶ ﺩدﻭوﻡم‪ ،‬ﺑﻪ ﺑﺮﺭرﺳﻲﯽ ﻧﺤﻮﻩهﻱﯼیي ﭘﻴﯿﺎﺩدﻩهﺳﺎﺯزﻱﯼیي ‪ File System‬ﺩدﺭر ﺳﻴﯿﺴﺘﻢﻋﺎﻣﻞ ‪ FreeBSD‬ﭘﺮﺩدﺍاﺧﺘﻪ ﺷﺪﻩه ﻭو ﺩدﺭر ﺑﺨﺶ ﺳﻮﻡم ﺍاﻟﮕﻮﺭرﻳﯾﺘﻢ ﺯزﻣﺎﻧﺒﻨﺪﻱﯼیي‬
‫‪ Multilevel Feedback Queue‬ﺭرﻭوﻱﯼیي ﺳﻴﯿﺴﺘﻢ ﭘﻴﯿﺎﺩدﻩهﺳﺎﺯزﻱﯼیي ﻣﻲﯽﺷﻮﺩد ﻭو ﺑﺎ ﻧﻮﺷﺘﻦ ﻳﯾﻚﮏ ﺑﺮﻧﺎﻣﻪﻱﯼیي ﺗﺴﺖ ﺩدﺭر ﺳﻄﺢ ﻛﮐﺎﺭرﺑﺮ‪ ،‬ﻋﻤﻠﻜﮑﺮﺩد ﺁآﻥن ﺑﺮﺭرﺳﻲﯽ ﻭو ﺑﺎ ﺯزﻣﺎﻧﺒﻨﺪ‬
‫ﭘﻴﯿﺸﻔﺮﺽض ‪ FreeBSD‬ﻣﻘﺎﻳﯾﺴﻪ ﻣﻲﯽﺷﻮﺩد‪.‬‬
‫ﺗﺤﻠﻴﯿﻞ ﻭو ﺑﺮﺭرﺳﻲﯽ ﭘﻴﯿﺎﺩدﻩهﺳﺎﺯزﻱﯼیي ﺍاﻟﮕﻮﺭرﻳﯾﺘﻢﻫﺎﻱﯼیي ﺯزﻣﺎﻥنﺑﻨﺪﻱﯼیي ﭘﺮﺩدﺍاﺯزﻩهﻫﺎ‬
‫ﺳﻴﯿﺴﺘﻢﻋﺎﻣﻞ ‪ FreeBSD‬ﭘﺮﺩدﺍاﺯزﻩهﻫﺎ ﺭرﺍا ﺩدﺭر ﺳﻪ ﻛﮐﻼﺱس ﻗﺮﺍاﺭر ﺩدﺍاﺩدﻩه ﻭو ﭘﺮﺩدﺍاﺯزﻩهﻫﺎﻱﯼیي ﻫﺮ ﻛﮐﻼﺱس ﺭرﺍا ﺑﺼﻮﺭرﺕت ﺟﺪﺍاﮔﺎﻧﻪ ﺯزﻣﺎﻥنﺑﻨﺪﻱﯼیي ﻣﻲﯽ ﻛﮐﻨﺪ‪ .‬ﺩدﺭر ﺍاﻳﯾﻦ ﺑﺨﺶ‬
‫ﺩدﺍاﻧﺸﺠﻮﻳﯾﺎﻥن ﺑﺎﻳﯾﺪ ﺑﺎ ﺑﺮﺭرﺳﻲﯽ ﭘﻴﯿﺎﺩدﻩهﺳﺎﺯزﻱﯼیي ﺍاﻳﯾﻦ ﺯزﻣﺎﻥنﺑﻨﺪﻫﺎ ﻭو ﻫﻤﭽﻨﻴﯿﻦ ﻣﺴﺘﻨﺪﺍاﺕت ﻣﻮﺟﻮﺩد ﺩدﺭر ﺍاﻳﯾﻦ ﺯزﻣﻴﯿﻨﻪ‪ ،‬ﺭرﻭوﺵش ﺩدﻗﻴﯿﻖ ﻣﻮﺭرﺩد ﺍاﺳﺘﻔﺎﺩدﻩه ﺑﺮﺍاﻱﯼیي ﺯزﻣﺎﻥنﺑﻨﺪﻱﯼیي ﻭو‬
‫ﻫﻤﭽﻨﻴﯿﻦ ﺗﻮﺍاﺑﻊ ﻣﻮﺭرﺩد ﺍاﺳﺘﻔﺎﺩدﻩه ﺑﺮﺍاﻱﯼیي ﺍاﻳﯾﻦ ﻣﻨﻈﻮﺭر ﺭرﺍا ﺑﺮﺭرﺳﻲﯽ ﻧﻤﺎﻳﯾﻨﺪ ﻭو ﻳﯾﻚﮏ ﻣﺴﺘﻨﺪ ﺷﺎﻣﻞ ﺗﻮﺿﻴﯿﺤﺎﺕت ﻛﮐﺎﻣﻠﻲﯽ ﺩدﺭر ﺍاﻳﯾﻦ ﻣﻮﺭرﺩد ﺍاﺭرﺍاﻳﯾﻪ ﻧﻤﺎﻳﯾﻨﺪ‪ .‬ﺩدﺭر ﻣﺴﺘﻨﺪ ﺍاﺭرﺍاﻳﯾﻪ‬
‫ﺷﺪﻩه ﻋﻼﻭوﻩه ﺑﺮ ﺳﺎﺧﺘﺎﺭر ﻛﮐﻠﻲﯽ ﺭرﻭوﺵش ﺯزﻣﺎﻥنﺑﻨﺪﻱﯼیي ﻭو ﺍاﻟﮕﻮﺭرﻳﯾﺘﻢ ﻣﻮﺭرﺩد ﺍاﺳﺘﻔﺎﺩدﻩه‪ ،‬ﺗﻮﺿﻴﯿﺤﺎﺕت ﻛﮐﺎﻣﻠﻲﯽ ﺩدﺭرﺑﺎﺭرﻩه ﺗﻮﺍاﺑﻊ ﻣﻮﺟﻮﺩد‪ ،‬ﻋﻤﻠﻜﮑﺮﺩد ﻫﺮ ﻳﯾﻚﮏ‪ ،‬ﺳﻠﺴﻠﻪ ﻣﺮﺍاﺗﺐ‬
‫ﻓﺮﺍاﺧﻮﺍاﻧﻲﯽ‪ ،‬ﺯزﻣﺎﻥن ﺍاﺟﺮﺍاﻱﯼیي ﻫﺮ ﻛﮐﺪﺍاﻡم ﻭو ﺳﺎﻳﯾﺮ ﺍاﻃﻼﻋﺎﺗﻲﯽ ﻛﮐﻪ ﺑﺮﺍاﻱﯼیي ﺍاﻳﯾﺠﺎﺩد ﺗﻐﻴﯿﻴﯿﺮﺍاﺕت ﻣﻮﺭرﺩد ﻧﻴﯿﺎﺯز ﺧﻮﺍاﻫﻨﺪ ﺑﻮﺩد ﻧﻴﯿﺰ ﺑﺎﻳﯾﺪ ﻭوﺟﻮﺩد ﺩدﺍاﺷﺘﻪ ﺑﺎﺷﺪ‪.‬‬
‫ﺗﺤﻠﻴﯿﻞ ﻭو ﺑﺮﺭرﺳﻲﯽ ﻓﺎﻳﯾﻞ ﺳﻴﯿﺴﺘﻢ ﺍاﺳﺘﻔﺎﺩدﻩه ﺷﺪﻩه ﺩدﺭر ﺳﻴﯿﺴﺘﻢﻫﺎﻱﯼیي ﻋﺎﻣﻞ‬
‫ﺩدﺭر ﻳﯾﻚﮏ ﺳﻴﯿﺴﺘﻢﻋﺎﻣﻞ‪ ،‬ﻓﺎﻳﯾﻞ ﺳﻴﯿﺴﺘﻢ ﺟﺰﻭو ﻣﻬﻢﺗﺮﻳﯾﻦ ﺍاﻣﻜﮑﺎﻧﺎﺕت ﺍاﺳﺖ ﻭو ﺍاﺟﺎﺯزﻩهﻱﯼیي ‪ Upload‬ﻭو ‪ Store‬ﻣﺤﺘﻮﻳﯾﺎﺕت ﻣﺨﺘﻠﻒ ﺭرﺍا ﺩدﺭرﻭوﻥن ﺳﻴﯿﺴﺘﻢﻋﺎﻣﻞ ﺑﻪ ﻛﮐﺎﺭرﺑﺮ‬
‫ﻣﻲﯽﺩدﻫﺪ‪ .‬ﺩدﺭر ﺳﻴﯿﺴﺘﻢﻋﺎﻣﻞ ‪ FreeBSD‬ﻧﺴﺨﻪﻱﯼیي ﭘﻴﯿﺶﻓﺮﺽض ﻓﺎﻳﯾﻞ ﺳﻴﯿﺴﺘﻢ‪ UFS ( Unix File System) ،‬ﺍاﺳﺖ‪ .‬ﺍاﻟﺒﺘﻪ ﺍاﻳﯾﻦ ﺳﻴﯿﺴﺘﻢﻋﺎﻣﻞ ﺍاﺯز ﺍاﻧﻮﺍاﻉع ﺩدﻳﯾﮕﺮﻱﯼیي‬
‫ﺍاﺯز ﻓﺎﻳﯾﻞ ﺳﻴﯿﺴﺘﻢﻫﺎ ﻫﻢ ﭘﺸﺘﻴﯿﺒﺎﻧﻲﯽ ﻣﻲﯽﻛﮐﻨﺪ‪ .‬ﺑﻪ ﻋﻨﻮﺍاﻥن ﻣﺜﺎﻝل ﻣﻲﯽﺗﻮﺍاﻥن ﺍاﺯز ﺩدﺳﺘﮕﺎﻩهﻫﺎﻳﯾﻲﯽ ﻛﮐﻪ ﺩدﺭر ﺁآﻧﻬﺎ ﺍاﺯز ﻓﺎﻳﯾﻞ ﺳﻴﯿﺴﺘﻢ ‪ EXT‬ﺍاﺳﺘﻔﺎﺩدﻩه ﺷﺪﻩه ﺍاﺳﺖ‪ ،‬ﺭرﻭوﻱﯼیي‬
‫‪ FreeBSD‬ﻧﻴﯿﺰ ﺍاﺳﺘﻔﺎﺩدﻩه ﻛﮐﺮﺩد‪.‬‬
‫ﺩدﺭر ﺍاﻳﯾﻦ ﺑﺨﺶ ﺩدﺍاﻧﺸﺠﻮﻳﯾﺎﻥن ﺑﺎﻳﯾﺪ ﺍاﺑﺘﺪﺍا ﺑﺮﺭرﺳﻲﯽ ﺩدﺍاﺷﺘﻪ ﺑﺎﺷﻨﺪ ﺭرﻭوﻱﯼیي ﻓﺎﻳﯾﻞ ﺳﻴﯿﺴﺘﻢ ﭘﻴﯿﺶﻓﺮﺽض ‪ FreeBSD‬ﻭو ﻣﻘﺎﻳﯾﺴﻪﺍاﻱﯼیي ﺩدﺍاﺷﺘﻪ ﺑﺎﺷﻨﺪ ﺑﻴﯿﻦ ‪UFS, UFS2,‬‬
‫‪. ZFS‬‬
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‫ﭘﻴﯿﺎﺩدﻩهﺳﺎﺯزﻱﯼیي ﺍاﻟﮕﻮﺭرﻳﯾﺘﻢ ﺯزﻣﺎﻥنﺑﻨﺪﻱﯼیي ﺩدﺭر ﻫﺴﺘﻪﻱﯼیي ﺳﻴﯿﺴﺘﻢﻋﺎﻣﻞ‬
‫ﺩدﺭر ﺍاﻳﯾﻦ ﺑﺨﺶ ﺩدﺍاﻧﺸﺠﻮﻳﯾﺎﻥن ﺑﺎﻳﯾﺪ ﺍاﻟﮕﻮﺭرﻳﯾﺘﻢ ﺯزﻣﺎﻥنﺑﻨﺪﻱﯼیي ‪ Multilevel Feedback Queue‬ﺭرﺍا ﺩدﺭر ﻫﺴﺘﻪ ﺳﻴﯿﺴﺘﻢﻋﺎﻣﻞ ﭘﻴﯿﺎﺩدﻩهﺳﺎﺯزﻱﯼیي ﻛﮐﻨﺪ‪ .‬ﭘﻴﯿﺎﺩدﻩهﺳﺎﺯزﻱﯼیي ﺑﺎﻳﯾﺪ‬
‫ﺷﺎﻣﻞ ﺩدﻭو ﻓﺮﺍاﺧﻮﺍاﻧﻲﯽ ﺳﻴﯿﺴﺘﻤﻲﯽ ﺯزﻳﯾﺮ ﺑﺎﺷﺪ‪.‬‬
‫ ﺍاﻓﺰﻭوﺩدﻥن ﻳﯾﻚﮏ ﭘﺮﺩدﺍاﺯزﻩه ﺑﻪ ﺳﻴﯿﺴﺘﻢ ﺯزﻣﺎﻥنﺑﻨﺪﻱﯼیي ‪MFQ‬‬‫ ﺣﺬﻑف ﻳﯾﻚﮏ ﭘﺮﺩدﺍاﺯزﻩه ﺍاﺯز ﺳﻴﯿﺴﺘﻢ ﺯزﻣﺎﻥنﺑﻨﺪﻱﯼیي ‪MFQ‬‬‫ﻫﺮ ﭘﺮﺩدﺍاﺯزﻫﺎﻱﯼیي ﻛﮐﻪ ﺧﻮﺩد ﺭرﺍا ﺑﻪ ﺳﻴﯿﺴﺘﻢ ﺯزﻣﺎﻧﺒﻨﺪﻱﯼیي ﺟﺪﻳﯾﺪ ﺍاﻓﺰﻭوﺩدﻩه ﺑﺎﺷﺪ ﺗﻮﺳﻂ ﺯزﻣﺎﻥنﺑﻨﺪ ﭘﻴﯿﺎﺩدﻩهﺳﺎﺯزﻱﯼیي ﺷﺪﻩه ﺯزﻣﺎﻥنﺑﻨﺪﻱﯼیي ﺧﻮﺍاﻫﺪ ﺷﺪ ﻭو ﭘﺲ ﺍاﺯز ﺧﺎﺭرﺝج ﺷﺪﻥن ﺍاﺯز‬
‫ﺍاﻳﯾﻦ ﺳﻴﯿﺴﺘﻢ ﺗﻮﺳﻂ ﻓﺮﺍاﺧﻮﺍاﻧﻲﯽ ﺩدﻭوﻡم‪ ،‬ﺑﺎﻳﯾﺪ ﺑﻪ ﺯزﻣﺎﻧﺒﻨﺪﻱﯼیي ﻋﺎﺩدﻱﯼیي ﺑﺮﮔﺮﺩدﺩد‪ .‬ﭘﺮﺩدﺍاﺯزﻩهﻫﺎ ﺩدﺭر ﺳﻴﯿﺴﺘﻢ ﻋﺎﻣﻞ ‪ FreeBSD‬ﺩدﺭر ﺳﻪ ﻛﮐﻼﺱس ﻗﺮﺍاﺭر ﮔﺮﻓﺘﻪ ﻭو ﻫﺮ ﻛﮐﻼﺱس‬
‫ﺑﺼﻮﺭرﺕت ﺟﺪﺍاﮔﺎﻧﻪ ﺯزﻣﺎﻥنﺑﻨﺪﻱﯼیي ﻣﻲﯽﺷﻮﺩد‪ .‬ﺩدﺭر ﻧﺘﻴﯿﺠﻪ ﺗﻤﺎﻡم ﭘﺮﺩدﺍاﺯزﻩهﻫﺎﻳﯾﻲﯽ ﻛﮐﻪ ﺑﻪ ﺳﻴﯿﺴﺘﻢ ﺯزﻣﺎﻧﺒﻨﺪﻱﯼیي ﺟﺪﻳﯾﺪ ﺍاﺿﺎﻓﻪ ﻣﻲﯽﺷﻮﻧﺪ ﺑﺎﻳﯾﺪ ﺩدﺭر ﻳﯾﻚﮏ ﻛﮐﻼﺱس ﻣﺸﺨﺺ ﻗﺮﺍاﺭر‬
‫ﺩدﺍاﺩدﻩه ﺷﺪﻩه ﺑﺎﺷﻨﺪ ‪ .‬ﺩدﺭر ﺻﻮﺭرﺕت ﻋﺪﻡم ﻗﺮﺍاﺭر ﺩدﺍاﺷﺘﻦ ﺩدﺭر ﻳﯾﻚﮏ ﻛﮐﻼﺱس ﺑﺎﻳﯾﺪ ﺑﻪ ﭘﺮﺩدﺍاﺯزﻩه ﺧﻄﺎ ﺩدﺍاﺩدﻩه ﺷﻮﺩد ﺗﺎ ﻛﮐﻼﺱس ﺧﻮﺩد ﺭرﺍا ﺗﻮﺳﻂ ﻓﺮﺍاﺧﻮﺍاﻧﻲﯽﻫﺎﻱﯼیي ﺳﻴﯿﺴﺘﻤﻲﯽ ﻣﻮﺟﻮﺩد‬
‫ﺗﻐﻴﯿﻴﯿﺮ ﺩدﻫﺪ‪.‬‬
‫ﻧﻜﮑﺎﺕت ﻣﻬﻢ ﺩدﺭرﻣﻮﺭرﺩد ﺑﺨﺶ ﺳﻮﻡم‪:‬‬
‫ ﺑﺮﺍاﻱﯼیي ﺍاﻣﺘﺤﺎﻥن ﻛﮐﺎﺭرﻛﮐﺮﺩد ﺩدﺭرﺳﺖ ﺯزﻣﺎﻧﺒﻨﺪ ﻣﻲﯽﺗﻮﺍاﻧﻴﯿﺪ ﺍاﺯز ﻳﯾﻚﮏ ﺑﺮﻧﺎﻣﻪﻱﯼیي ﭼﺎﭖپ ﺭرﺷﺘﻪﻱﯼیي ﺳﻄﺢ ﻛﮐﺎﺭرﺑﺮ ﺍاﺳﺘﻔﺎﺩدﻩه ﻛﮐﻨﻴﯿﺪ‪ ،‬ﺑﻪ ﺍاﻳﯾﻦ ﺻﻮﺭرﺕت ﻛﮐﻪ ﻧﺸﺎﻥن ﺩدﻫﺪ ﻫﺮ‬‫ﺑﺎﺭر ﻛﮐﻪ ﺑﺮﻧﺎﻣﻪ ﺑﻪ ﺻﻔﻲﯽ ﭘﺎﻳﯾﻴﯿﻦﺗﺮ ﻣﻲﯽﺭرﻭوﺩد‪ TimeSlice ،‬ﺑﻴﯿﺸﺘﺮﻱﯼیي ﺩدﺭرﻳﯾﺎﻓﺖ ﻣﻲﯽﻛﮐﻨﺪ )ﻭو ﺩدﺭر ﻧﺘﻴﯿﺠﻪ ﻛﮐﺎﺭرﺍاﻛﮐﺘﺮﻫﺎﻱﯼیي ﺑﻴﯿﺸﺘﺮﻱﯼیي ﭼﺎﭖپ ﻣﻲﯽﺷﻮﺩد(‪.‬‬
‫ ﺑﺮﺍاﻱﯼیي ﭘﻴﯿﺎﺩدﻩهﺳﺎﺯزﻱﯼیي ‪ MFQ‬ﺍاﺳﺘﻔﺎﺩدﻩه ﺍاﺯز ‪ 3‬ﺻﻒ ﺑﺎ ﺿﺮﻳﯾﺐ ﺍاﻓﺰﺍاﻳﯾﺶ ‪ 2‬ﻛﮐﺎﻓﻲﯽ ﺍاﺳﺖ‪.‬‬‫ ﺑﺮﺍاﻱﯼیي ﭘﻴﯿﺎﺩدﻩهﺳﺎﺯزﻱﯼیي ‪ Dynamic TimeSlice‬ﻫﺎ ﻣﻲﯽﺗﻮﺍاﻧﻴﯿﺪ ﺍاﺯز ‪ Attribute‬ﻫﺎﻱﯼیي ﺩدﺍاﺧﻞ ﺳﺎﺧﺘﺎﺭر ‪ (TDF_NEEDRESCHED) Thread‬ﺍاﺳﺘﻔﺎﺩدﻩه‬‫ﻛﮐﻨﻴﯿﺪ‪.‬‬
‫ ﻣﻨﺎﺑﻊ ﺯزﻳﯾﺮ ﺩدﺭر ﺭرﺍاﺑﻄﻪ ﺑﺎ ﺍاﻳﯾﻦ ﺑﺨﺶ ﺳﻮﺩدﻣﻨﺪ ﻣﻲﯽﺑﺎﺷﻨﺪ‪:‬‬‫ ‪http://pages.cs.wisc.edu/~remzi/OSTEP/cpu-sched-mlfq.pdf‬‬‫ ‪http://lass.cs.umass.edu/~shenoy/courses/377/lectures/Lec05-part2.pdf‬‬‫ ‪http://stackoverflow.com/questions/25917288/multilevel-feedback-queue-scheduling‬‬‫ ‪http://www.liacs.nl/~krietvel/courses/os2014/os-2014-assignment2-scheduling.pdf‬‬‫ﻧﻜﮑﺎﺕت ﻣﻬﻢ ﺩدﺭر ﺗﺤﻮﻳﯾﻞ‪:‬‬
‫ ﻣﻄﺎﻟﺐ ﺩدﺍاﺧﻞ ﻣﺴﺘﻨﺪ ﺩدﺭر ﺗﺤﻮﻳﯾﻞ ﺣﻀﻮﺭرﻱﯼیي ﭘﺮﺳﻴﯿﺪﻩه ﺧﻮﺍاﻫﻨﺪ ﺷﺪ ﻭو ﺍاﻧﺘﻈﺎﺭر ﻣﻲﯽﺭرﻭوﺩد ﺗﻮﺿﻴﯿﺤﺎﺗﻲﯽ ﻛﮐﺎﻣﻞ ﻭو ﺩدﺭر ﺗﻄﺎﺑﻖ ﺑﺎ ﻣﺴﺘﻨﺪ ﺍاﺭرﺍاﻳﯾﻪ ﺷﻮﺩد‪.‬‬‫ ﺑﺨﺶ ﺳﻮﻡم ﺍاﻳﯾﻦ ﭘﺮﻭوﮊژﻩه‪ 60 ،‬ﺩدﺭرﺻﺪ ﻧﻤﺮﻩه ﺭرﺍا ﺩدﺍاﺭرﺍاﺳﺖ‪ ،‬ﺑﻨﺎﺑﺮﺍاﻳﯾﻦ ﺩدﺭر ﺍاﻧﺠﺎﻡم ﺍاﻳﯾﻦ ﺑﺨﺶ ﺩدﻗﺖ ﺑﻴﯿﺸﺘﺮﻱﯼیي ﺩدﺍاﺷﺘﻪ ﺑﺎﺷﻴﯿﺪ‪.‬‬‫‪ -‬ﻣﺴﺘﻨﺪ ﺍاﻳﯾﻦ ﭘﺮﻭوﮊژﻩه ﺑﺨﺶ ﻗﺎﺑﻞ ﺗﻮﺟﻬﻲﯽ ﺍاﺯز ﻧﻤﺮﻩهﻱﯼیي ﺍاﻳﯾﻦ ﭘﺮﻭوﮊژﻩه ﺭرﺍا ﺩدﺍاﺭرﺍاﺳﺖ‪ ،‬ﭘﺲ ﺩدﺭر ﻧﻮﺷﺘﻦ ﺁآﻥن ﺩدﻗﺖ ﻓﺮﻣﺎﻳﯾﻴﯿﺪ‪.‬‬
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‫ﺩدﺭر ﻃﻮﻝل ﺍاﻧﺠﺎﻡم ﭘﺮﻭوﮊژﻩه‪ ،‬ﻫﺮ ﺟﺎ ﻛﮐﻪ ﺍاﻗﺪﺍاﻡم ﺧﺎﺻﻲﯽ )ﭼﻪ ﺗﻐﻴﯿﻴﯿﺮﺍاﺕت‪ ،‬ﺍاﺟﺮﺍاﻱﯼیي ﻛﮐﺪ‪ ،‬ﻧﺼﺐ‪ ،‬ﻧﺘﺎﻳﯾﺞ ﻭو … ( ﺍاﻧﺠﺎﻡم ﺩدﺍاﺩدﻳﯾﺪ‪ Screen Shot ،‬ﺁآﻥن ﺭرﺍا ﺩدﺍاﺧﻞ‬
‫ﻣﺴﺘﻨﺪ ﻗﺮﺍاﺭر ﺩدﻫﻴﯿﺪ‪.‬‬
‫ﺯزﻣﺎﻥنﺑﻨﺪﻱﯼیي ﺗﺤﻮﻳﯾﻞ ﭘﺮﻭوﮊژﻩه ﻭو ﺑﺎﺭرﻡم ﻫﺮ ﺑﺨﺶ ﺩدﺭر ﮔﺮﻭوﻩه ﺩدﺭرﺱس ﭘﻴﯿﺶ ﺍاﺯز ﺗﺤﻮﻳﯾﻞﻫﺎ ﺍاﻋﻼﻡم ﺧﻮﺍاﻫﺪ ﺷﺪ‪ ،‬ﻟﻄﻔﺎ ﺩدﺭر ﺍاﺭرﺍاﻳﯾﻪﻫﺎﻱﯼیي ﺧﻮﺩد ﺍاﻳﯾﻦ ﺍاﻃﻼﻋﺎﺕت ﺭرﺍا ﻣﺪﻧﻈﺮ‬
‫ﺩدﺍاﺷﺘﻪ ﺑﺎﺷﻴﯿﺪ‪.‬‬
‫ﻟﻄﻔﺎ ﺑﻪ ﻣﻨﻈﻮﺭر ﺩدﺭرﻙﮎکك ﺑﻬﺘﺮ ﭘﺮﻭوﮊژﻩه ﺩدﺭر ﻛﮐﻼﺱس ﻣﺮﺗﺒﻂ ﺷﺮﻛﮐﺖ ﻧﻤﺎﻳﯾﻴﯿﺪ‪.‬‬
‫ﺳﻮﺍاﻻﺕت ﺧﻮﺩد ﺭرﺍا ﺗﻨﻬﺎ ﺍاﺯز ﻃﺮﻳﯾﻖ ﺁآﺩدﺭرﺱسﻫﺎﻱﯼیي ﺍاﻳﯾﻤﻴﯿﻞ ﺩدﺍاﺩدﻩهﺷﺪﻩه ﺍاﺭرﺳﺎﻝل ﻛﮐﻨﻴﯿﺪ‪.‬‬
‫ﺍاﻳﯾﻦ ﭘﺮﻭوﮊژﻩه ﺩدﺭر ﻗﺎﻟﺐ ﮔﺮﻭوﻩه ﻫﺎﻱﯼیي ﻳﯾﻚﮏ ﻳﯾﺎ ﺩدﻭو ﻧﻔﺮﻩه )ﺗﺮﺟﻴﯿﺤﺎ ﺩدﻭو ﻧﻔﺮﻩه( ﺍاﻧﺠﺎﻡم ﻣﻲﯽ ﭘﺬﻳﯾﺮﺩد‪ .‬ﮔﺮﻭوﻩهﻫﺎﻱﯼیي ﺧﺎﻧﻢﻫﺎ ﻭو ﺁآﻗﺎﻳﯾﺎﻥن ﺑﺎﻳﯾﺪ ﺟﺪﺍا ﺑﺎﺷﺪ‪.‬‬
‫ﮔﺮﻭوﻩه ﺧﻮﺩد ﺭرﺍا ﺣﺪﺍاﻛﮐﺜﺮ ﺗﺎ ﺗﺎﺭرﻳﯾﺦ ‪ 15‬ﺍاﺭرﺩدﻳﯾﺒﻬﺸﺖ ﺩدﺭر ﺟﺪﻭوﻝل ﺯزﻳﯾﺮ ﺩدﺭرﺝج ﻛﮐﻨﻴﯿﺪ‪.‬‬
‫ﺩدﺭر ﻣﺴﺘﻨﺪ ﺍاﺭرﺳﺎﻟﻲﯽ ﺑﺎﻳﯾﺪ ﺗﻤﺎﻣﻲﯽ ﻣﻮﺍاﺭرﺩد ﺧﻮﺍاﺳﺘﻪ ﺷﺪﻩه‪ ،‬ﻓﺎﻳﯾﻠﻬﺎﻱﯼیي ﺍاﻳﯾﺠﺎﺩد ﺷﺪﻩه ﻭو ﻫﻤﭽﻨﻴﯿﻦ ﺗﺼﺎﻭوﻳﯾﺮ ﻛﮐﺎﻓﻲﯽ ﺍاﺯز ﻣﺮﺍاﺣﻞ ﺍاﻧﺠﺎﻡم ﭘﺮﻭوﮊژﻩه ﻭوﺟﻮﺩد ﺩدﺍاﺷﺘﻪ ﺑﺎﺷﺪ‪.‬‬
‫ﮔﺮﻓﺘﻦ ﻧﻤﺮﻩه ﻛﮐﺎﻣﻞ ﻣﻨﻮﻁط ﺑﻪ ﺍاﺭرﺳﺎﻝل ﻣﺴﺘﻨﺪﺍاﺕت ﻛﮐﺎﻓﻲﯽ ﻣﻲﯽﺑﺎﺷﺪ‪.‬‬
‫ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ ﺍاﻣﻜﮑﺎﻥن ‪ Unstable‬ﺑﻮﺩدﻥن ﻫﺴﺘﻪﻫﺎﻱﯼیي ﺑﺨﺶ ﺍاﻭوﻝل‪ ،‬ﺗﻮﺻﻴﯿﻪ ﻣﻲﯽﺷﻮﺩد ﺑﺮﺍاﻱﯼیي ﺍاﻳﯾﻦ ﺑﺨﺶ ﺍاﺯز ﻳﯾﻚﮏ ﻧﺴﺨﻪﻱﯼیي ‪ Clean Installation‬ﺍاﺳﺘﻔﺎﺩدﻩه‬
‫ﻛﮐﻨﻴﯿﺪ‪.‬‬
‫ﻣﻮﺍاﺭرﺩد ﻗﺎﺑﻞ ﺗﺤﻮﻳﯾﻞ‪:‬‬
‫ ﺳﺎﺧﺘﺎﺭر ﻛﮐﻠﻲﯽ ﺭرﻭوﺵش ﺯزﻣﺎﻥنﺑﻨﺪﻱﯼیي ﻭو ﺍاﻟﮕﻮﺭرﻳﯾﺘﻢ ﻣﻮﺭرﺩد ﺍاﺳﺘﻔﺎﺩدﻩه )ﻣﺴﺘﻨﺪ(‬‫ ﺗﻮﺿﻴﯿﺤﺎﺕت ﻛﮐﺎﻣﻠﻲﯽ ﺩدﺭرﺑﺎﺭرﻩه ﺗﻮﺍاﺑﻊ ﻣﻮﺟﻮﺩد‪ ،‬ﻋﻤﻠﻜﮑﺮﺩد ﻫﺮ ﻳﯾﻚﮏ )ﻣﺴﺘﻨﺪ(‬‫ ﺳﻠﺴﻠﻪ ﻣﺮﺍاﺗﺐ ﻓﺮﺍاﺧﻮﺍاﻧﻲﯽ ﻭو ﺯزﻣﺎﻥن ﺍاﺟﺮﺍاﻱﯼیي ﻫﺮ ﻛﮐﺪﺍاﻡم )ﻣﺴﺘﻨﺪ(‬‫ ﺍاﻃﻼﻋﺎﺗﻲﯽ ﻛﮐﻪ ﺑﺮﺍاﻱﯼیي ﺍاﻳﯾﺠﺎﺩد ﺗﻐﻴﯿﻴﯿﺮﺍاﺕت ﻣﻮﺭرﺩد ﻧﻴﯿﺎﺯز ﺧﻮﺍاﻫﻨﺪ ﺑﻮﺩد )ﻣﺴﺘﻨﺪ(‬‫ ﺗﻮﺿﻴﯿﺤﺎﺗﻲﯽ ﺩدﺭرﻣﻮﺭرﺩد ﻓﺎﻳﯾﻞ ﺳﻴﯿﺴﺘﻢﻫﺎ ﻭو ﻣﻌﻴﯿﺎﺭرﻫﺎﻱﯼیي ﺍاﺭرﺯزﻳﯾﺎﺑﻲﯽ ﻫﺮﻳﯾﻚﮏ )ﻣﺴﺘﻨﺪ(‬‫ ﺗﻔﺎﻭوﺕت ﻓﺎﻳﯾﻞ ﺳﻴﯿﺴﺘﻢ ‪ Linux‬ﻭو ‪) FreeBSD‬ﻣﺴﺘﻨﺪ(‬‫‪ -‬ﺗﻮﺿﻴﯿﺤﺎﺗﻲﯽ ﺩدﺭرﻣﻮﺭرﺩد ﻓﺎﻳﯾﻞ ﺳﻴﯿﺴﺘﻢ ‪ UFS‬ﺑﻪ ﻫﻤﺮﺍاﻩه ﺗﻮﺿﻴﯿﺢ ﻋﻤﻠﻜﮑﺮﺩد )ﻣﺴﺘﻨﺪ(‬
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‫‬‫‬‫‬‫‬‫‬‫‬‫‬‫‪-‬‬
‫ﺗﻔﺎﻭوﺕت ‪) UFS, UFS2, ZFS, EXT2FS‬ﻣﺴﺘﻨﺪ(‬
‫ﺗﻤﺎﻣﻲﯽ ﻛﮐﺪﻫﺎ ﻭو ﻓﺎﻳﯾﻞﻫﺎﻱﯼیي ﺍاﻳﯾﺠﺎﺩد ﺷﺪﻩه ) ﺑﻪﻏﻴﯿﺮ ﺍاﺯز ﺧﻮﺩد ﺳﻴﯿﺴﺘﻢﻋﺎﻣﻞ (‬
‫ﺗﻮﺿﻴﯿﺤﺎﺗﻲﯽ ﺩدﺭر ﻣﻮﺭرﺩد ﺍاﻟﮕﻮﺭرﻳﯾﺘﻢ ﺯزﻣﺎﻥنﺑﻨﺪﻱﯼیي ‪) MFQ‬ﻣﺴﺘﻨﺪ(‬
‫ﺗﻔﺎﻭوﺕت ‪ MFQ‬ﺑﺎ ﺯزﻣﺎﻥنﺑﻨﺪ ﭘﻴﯿﺶﻓﺮﺽض ‪) FreeBSD‬ﻣﺴﺘﻨﺪ(‬
‫ﻛﮐﺪ ﺯزﻣﺎﻥنﺑﻨﺪ ﺩدﺭر ﺩدﺍاﺧﻞ ﺳﻴﯿﺴﺘﻢﻋﺎﻣﻞ )ﻣﺴﺘﻨﺪ ﻭو ﺣﻀﻮﺭرﻱﯼیي(‬
‫ﺍاﻓﺰﻭوﺩدﻥن ﻳﯾﻚﮏ ﭘﺮﺩدﺍاﺯزﻩه ﺑﻪ ﺳﻴﯿﺴﺘﻢ ﺯزﻣﺎﻥنﺑﻨﺪﻱﯼیي ‪) MFQ‬ﻣﺴﺘﻨﺪ ﻭو ﺣﻀﻮﺭرﻱﯼیي(‬
‫ﺣﺬﻑف ﻳﯾﻚﮏ ﭘﺮﺩدﺍاﺯزﻩه ﺍاﺯز ﺳﻴﯿﺴﺘﻢ ﺯزﻣﺎﻥنﺑﻨﺪﻱﯼیي ‪) MFQ‬ﻣﺴﺘﻨﺪ ﻭو ﺣﻀﻮﺭرﻱﯼیي(‬
‫ﻧﻤﻮﻧﻪ ﺑﺮﻧﺎﻣﻪﻱﯼیي ﻛﮐﺎﺭرﺑﺮﺩدﻱﯼیي ﺑﺮﺍاﻱﯼیي ﺍاﻣﺘﺤﺎﻥن ﺻﺤﺖ ﺍاﻟﮕﻮﺭرﻳﯾﺘﻢ ﺯزﻣﺎﻥنﺑﻨﺪ )ﻣﺴﺘﻨﺪ ﻭو ﺣﻀﻮﺭرﻱﯼیي(‬
‫ﻣﻮﻓﻖ ﺑﺎﺷﻴﯿﺪ‬
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