Ziziphi ii-algorithms ezisetyenziselwa i-SSD vs HDD?
2024-09-19 14:17:26
I-Solid State Drives (SSD) kunye ne-Hard Disk Drives (i-HDD) inobuchwephesha obuhlukeneyo obungaphantsi, kunye neendlela abazisebenzisayo ekulawuleni ukugcinwa, ukubuyiswa kwedatha, kunye nokuphucula ukusebenza kwahluka kakhulu.
Isiqulatho
1. I-SSD (i-Solid State Drive) Ii-algorithms
Ii-SSD zisebenzisa imemori yeflash esekwe kwi-NAND, kwaye i-algorithms iyilelwe ukuphucula isantya, ukunxiba umgangatho, kunye nobude besixhobo. Ezinye ze-algorithms eziphambili zezi:
Indlela yokunxiba:
Injongo: Iqinisekisa ukuba imijikelo yokubhala/yokucima isasazwe ngokulinganayo kuzo zonke iiseli zememori, ithintela ukunxitywa kwangaphambi kwexesha kuyo nayiphi na iseli enye.
Isebenza njani: Le ndlela ihlala ivavanya ukuba zeziphi iibhloko zememori ezisetyenziswa kakhulu kwaye iphinde isasaze idatha ukunqanda ukusebenzisa kakhulu iibhloko ezithile.
Ukuqokelelwa kwenkunkuma
Injongo: Isusa idatha engalunganga (okanye idatha ephawulwe ukucima) kwiibhloko ukukhulula indawo kunye nokuphucula isantya.
Indlela Esebenza Ngayo: Xa ibhloko yememori iqulethe idatha esebenzayo kunye nengasebenziyo, indlela yokuqokelela inkunkuma idibanisa idatha esebenzayo kwibhloko enye kwaye ikhulula ezinye iibhloko zokugcina idatha entsha.
QAPHELA:
Injongo: Inxibelelana ne-SSD zeziphi iibhloko zedatha ezingasasetyenziswayo kwaye zinokusulwa, kungoko kukhawuleziswa imisebenzi yokubhala.
Isebenza njani: Xa idatha itshatyalalisiwe, inkqubo yokusebenza ithumela umyalelo we-TRIM kwi-SSD, ivumela ukuba cima iibhloko ezichongiweyo ngaphambi kwexesha, ukuthoba ukubhala ukubambezeleka.
Ikhowudi yoLungiso lwemposiso (ECC):
Injongo: Ifumanisa kwaye ilungise iimpazamo zedatha ezinokuthi zenzeke ngexesha lenkqubo yokufunda / yokubhala.
Indlela esebenza ngayo: Ii-SSD zisebenzisa i-algorithms yokulungiswa kweempazamo ukuqinisekisa ukuba idatha ichanekile, njengoko iiseli zememori ye-NAND zinokutyekela kwiimpazamo eziguqukayo.
Ukubonelela ngokuBanzi:
Injongo: Ukwabela umthamo owongezelelweyo wokugcina ukuncedisa ekunxibeni komgangatho, ukuqokelelwa kwenkunkuma, kunye nokusebenza ngokubanzi.
Indlela esebenza ngayo: Olu buchule lubonelela ngenkumbulo eyongezelelweyo yeflash engabonakali kumsebenzisi kodwa isetyenziswa ngaphakathi yi-SSD ukulawula iibhloko ezithotyiweyo kunye nokwandisa ukusebenza.
Ulawulo olubi lweBlock:
Injongo: Chonga kwaye wahlule iibhloko zememori ezingalunganga.
Indlela esebenza ngayo: Ii-SSD zibeke iliso kwimpilo yeebhloko zememori kwaye ziphawule naziphi na ezonakalisiweyo njengezingasebenzisekiyo, ziqinisekisa ukuba idatha ayibhalwanga kwezi bhloko ezimbi.
2. HDD (Hard Disk Drive) Algorithms
Ii-HDD zisebenzisa iiplatters ezijikelezayo ezijikelezayo ukugcina idatha kwaye ufunde / ubhale iintloko ukufikelela kuyo. Ii-algorithms zabo zenzelwe ukulawula ubume bomzimba bendawo yokugcina kunye nokwandisa ukusebenza. Ii-algorithms eziphambili ziquka:
Ii-algorithms zokucwangcisa iDiski:
Injongo:
Ukwandisa ulandelelwano apho amacandelo ediski afikeleleke khona ukunciphisa ixesha lokufuna kunye ne-latency yokujikeleza.
Imizekelo:
Isinyusi (SCAN) Umgaqo-nkqubo: Ihambisa intloko yokufunda/yokubhala kwicala elinye de ifike esiphelweni sediski phambi kokubuyisela umva, inciphisa umndilili wokufuna ixesha.
Elona xesha lifutshane lokufuna kuqala (SSTF): Ibeka phambili izicelo ezikufutshane nendawo yentloko yangoku ukunciphisa ixesha lokufuna.
Oza kuqala, oKhonzwa kuQala (FCFS): Iqhuba izicelo ngendlela ezifika ngayo, nangona oku kungasebenzi kakuhle kune-SSF okanye iSCAN.
Bhala Ugcino:
Injongo: Ukuphucula umsebenzi wokubhala ngokugcina okwethutyana idatha kwi-cache ngaphambi kokuyibhala kwidiski.
Isebenza njani: Idatha ibhalwa kwimemori ye-cache enesantya esiphezulu kuqala, kwaye emva koko ibhalwe kwidiski ejikelezayo ecothayo kwiibhetshi, ukunciphisa ixesha elifunekayo kwimisebenzi yokubhala.
Funda-Phambili Ugcino (Ukulanda kwangaphambili):
Injongo: Ukuphucula ukusebenza kokufunda ngokuqikelela izicelo zedatha yexesha elizayo kunye nokufunda idatha kwi-cache phambi kokuba icelwe.
Indlela esebenza ngayo: Ngokusekwe kwiipateni zokufikelela, i-algorithm ilayisha kwangaphambili idatha ukusuka kumacandelo akufutshane okanye ilandelela kwi-cache ukunciphisa umva wokufunda.
Ukufunyanwa kwempazamo kunye noLungiso (ECC):
Injongo: Iqinisekisa ingqibelelo yedatha egcinwe kwidiski.
Indlela esebenza ngayo: Ii-HDD zisebenzisa i-ECC algorithms ukufumanisa nokulungisa iimpazamo ezinokuthi zenzeke ngenxa yokuphazamiseka kwemagnethi okanye ukuguga komphezulu weplatter.
Uhlengahlengiso lweCandelo elibi:
Injongo: Ukuqinisekisa imfezeko yedatha ngokuthumela ngokutsha imibhalo esuka kumacandelo amabi ukuya kumacandelo asecaleni.
Indlela esebenza ngayo: I-HDD igcina uluhlu lwamacandelo amabi kwaye isebenzisa amacandelo angasese ukuze ithathe indawo yawo, iqinisekisa ukuba idatha ibhaliwe kwiindawo ezithembekileyo zediski.
Ukwahlulwa:
Injongo: Ukulungelelanisa kwakhona idatha eyahlulwahlulwayo ukuphucula ukusebenza kokufunda nokubhala.
Indlela esebenza ngayo: Xa iifayile zihlakazekile kwiindawo ezahlukeneyo zediski (i-fragmentation), i-algorithm ye-defragmentation iphinda ilungise idatha ukuze idibanise, ukunciphisa ixesha lokufuna ukufikelela kwiifayile.
3. Isishwankathelo seeyantlukwano
Ii-algorithms ze-SSD zijolise ekunyuseni umgangatho wokunxiba, ukuqokelelwa kwenkunkuma, kunye nokulungiswa kwempazamo ngenxa yemijikelo elinganiselweyo yokubhala yememori edanyazayo.
I-algorithms ye-HDD igxininise ekuphuculeni iinkqubo zemishini, ezifana nokunciphisa ixesha lokufuna kunye nokusingatha ukuhlukana kwediski.
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