Imaphi Ama-Algorithms Asetshenziselwa i-SSD vs HDD?
2024-09-19 14:17:26
I-Solid State Drives (SSD) kanye ne-Hard Disk Drives (HDD) anobuchwepheshe obuyisisekelo obuhlukile, futhi amasu abawasebenzisela ukulawula isitoreji, ukubuyisa idatha, nokuthuthukisa ukusebenza ahluke kakhulu.
Okuqukethwe
1. I-SSD (Solid State Drive) Ama-algorithms
Ama-SSD asebenzisa inkumbulo ye-flash esekelwe ku-NAND, futhi ama-algorithms aklanyelwe ukuthuthukisa isivinini, izinga lokugqoka, nokuphila isikhathi eside kwedivayisi. Ezinye ze-algorithms ezinkulu yilezi:
Ileveli yokugqoka:
Injongo: Iqinisekisa ukuthi imijikelezo yokubhala/ukusula ihlakazeka ngokulinganayo kuwo wonke amaseli enkumbulo, ivimbela ukuguga ngaphambi kwesikhathi kunoma iyiphi iseli eyodwa.
Indlela Esebenza Ngayo: Le ndlela ihlale ihlola ukuthi imaphi amabhlogo enkumbulo asetshenziswa kakhulu futhi isabalalise kabusha idatha ukugwema ukusebenzisa ngokweqile amabhulokhi athile.
Ukuqoqwa kukadoti
Injongo: Isusa idatha engalungile (noma idatha emakelwe ukususwa) kumabhulokhi ukuze kukhululwe isikhala futhi kuthuthukiswe isivinini.
Indlela Esebenza Ngayo: Uma ibhulokhi yememori iqukethe kokubili idatha evumelekile nengalungile, indlela yokuqoqa udoti ihlanganisa idatha evumelekile ibe ibhulokhi eyodwa futhi ikhulule amanye amabhulokhi ukuze ugcine idatha entsha.
NQATHA:
Inhloso: Ixhumana ne-SSD ukuthi yimaphi amabhulokhi wedatha angasasetshenziswa futhi angasulwa, yingakho kusheshiswa imisebenzi yokubhala.
Isebenza kanjani: Uma idatha ichithwa, isistimu yokusebenza ithumela imiyalelo ye-TRIM ku-SSD, ivumela ukuthi sula amabhlogo aqokiwe ngaphambi kwesikhathi, ehlisa ukubambezeleka kokubhala.
Ikhodi Yokulungisa Iphutha (ECC):
Inhloso: Ithola futhi ilungise amaphutha edatha okungenzeka ngesikhathi senqubo yokufunda/yokubhala.
Indlela esebenza ngayo: Ama-SSD asebenzisa ama-algorithms okulungisa amaphutha ukuze aqinisekise ukuthi idatha inembile, njengoba amaseli enkumbulo e-NAND angase athambekele ekubeni namaphutha okuphenduphenduka kancane.
Ukunikezwa Ngokweqile:
Inhloso: Inikeza umthamo owengeziwe wesitoreji ukuze usize ngokuguga, ukuqoqwa kukadoti, nokusebenza kukonke.
Isebenza kanjani: Le nqubo ihlinzeka ngememori ye-flash eyengeziwe engabonakali kumsebenzisi kodwa isetshenziswa ngaphakathi yi-SSD ukuze ilawule amabhulokhi owonakele futhi ithuthukise ukusebenza.
Ukuphathwa Okubi Kwebhulokhi:
Inhloso: Ihlonza futhi ihlukanise amabhlogo enkumbulo anephutha.
Indlela esebenza ngayo: Ama-SSD aqapha impilo yamabhulokhi enkumbulo futhi amaka noma yiziphi ezilimele njengezingasebenziseki, aqinisekise ukuthi idatha ayilokothi ibhalwe kulawa mabhulokhi amabi.
2. I-HDD (I-Hard Disk Drive) Ama-algorithms
Ama-HDD asebenzisa izicwecwe kazibuthe eziphothayo ukuze agcine idatha futhi afunde/abhale amakhanda ukuze afinyelele kuwo. Ama-algorithms abo enzelwe ukuphatha isimo somzimba sendawo yesitoreji futhi athuthukise ukusebenza. Ama-algorithms abalulekile afaka:
Ama-algorithms wokuhlela idiski:
Inhloso:
Ilungiselela indlela imikhakha yediski efinyelelwa ngayo ukuze kuncishiswe isikhathi sokufuna nokubambezeleka kokujikeleza.
Izibonelo:
I-Elevator (SCAN) Algorithm: Ihambisa ikhanda lokufunda/lokubhala liye ohlangothini olulodwa ize ifike ekugcineni kwediski ngaphambi kokuhlehla, kunciphisa isikhathi sokufuna esimaphakathi.
Isikhathi Sokufuna Esifushane Kakhulu Okokuqala (SSTF): Ibeka phambili izicelo eziseduze nendawo yekhanda lamanje ukuze kuncishiswe isikhathi sokufuna.
Oza Owokuqala, Osebenza Okokuqala (FCFS): Icubungula izicelo ngendlela ezifika ngayo, nakuba lokhu kungasebenzi kahle kune-SSTF noma i-SCAN.
Bhala inqolobane:
Injongo: Ithuthukisa ukusebenza kokubhala ngokugcina idatha okwesikhashana kunqolobane ngaphambi kokuyibhalela kudiski.
Indlela esebenza ngayo: Idatha ibhalwa kumemori yenqolobane yesivinini esikhulu kuqala, bese ibhalwa kudiski elijikelezayo elihamba kancane ngamaqoqo, kunciphisa sonke isikhathi esidingekayo ekusebenzeni kokubhala.
Ukulondoloza isikhashana kokufunda phambili (Ilanda kuqala):
Inhloso: Ithuthukisa ukusebenza kokufunda ngokubikezela izicelo zedatha zesikhathi esizayo nokufunda idatha kunqolobane ngaphambi kokuba icelwe.
Isebenza kanjani: Ngokusekelwe emaphethini okufinyelela, i-algorithm ilayisha kuqala idatha isuka emikhakheni eseduze noma ilandelela kunqolobane ukuze kuncishiswe ukubambezeleka kokufunda.
Ukutholwa Kwephutha Nokulungiswa (ECC):
Inhloso: Iqinisekisa ubuqotho bedatha egcinwe kudiski.
Indlela esebenza ngayo: Ama-HDD asebenzisa ama-algorithms e-ECC ukuze athole futhi alungise amaphutha okungenzeka ngenxa yokuphazamiseka kazibuthe noma ukuguga kwendawo yocwecwe.
Ukuhlelwa kabusha Kwemboni Engalungile:
Inhloso: Iqinisekisa ubuqotho bedatha ngokuqondisa kabusha imibhalo esuka emikhakheni emibi iye emikhakheni eyisipele.
Isebenza kanjani: I-HDD igcina uhlu lwemikhakha emibi futhi isebenzisa imikhakha eyisipele ukuze ingene esikhundleni sayo, iqinisekisa ukuthi idatha ibhalwa ezindaweni ezithembekile zediski.
Ukuhlukaniswa:
Injongo: Ihlela kabusha idatha ehlukene ukuze ithuthukise ukusebenza kokufunda nokubhala.
Indlela esebenza ngayo: Uma amafayela ehlakazekile ezingxenyeni ezihlukene zediski (ukuhlukaniswa), i-algorithm yokwahlukanisa ihlela kabusha idatha ukuze iyenze ihlangane, inciphise isikhathi sokufuna sokufinyelela amafayela.
3.Isifinyezo Somehluko
Ama-algorithms we-SSD agxile ekulinganisweni kokugqoka, ukuqoqwa kukadoti, nokulungiswa kwamaphutha ngenxa yemijikelezo yokubhala enomkhawulo yememori ye-flash.
Ama-algorithms we-HDD agxile ekwandiseni izinqubo zemishini, njengokunciphisa isikhathi sokufuna nokuphatha ukuhlukaniswa kwediski.
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