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Iyini i-disk array? Yiziphi izinzuzo kubasingathi bezimboni?

2024-09-20 16:56:34

Okuqukethwe

1. Isingeniso se-RAID
2. Ama-RAID avamile ahlanganisa u-0, 1, 5, no-10. Ake sikhulume ngezinzuzo zawo ezithile
3. Yiziphi izinzuzo ze-RAID zamakhompyutha ezimboni?

1. Isingeniso se-RAID

I-RAID ibizwa nangokuthi i-Redundant Array yama-Independent Disks. Iwuhlelo lokugcina olwakhiwe ngama-hard disk amaningi. Ungakwazi futhi ukucabanga ngakho njengokuxhumana kwe-serial, ukuwahlanganisa ndawonye. Ithuthukisa ukuphindaphindeka kwedatha nokutholakala ngokusabalalisa idatha kuma-hard disk amaningi.

I-RAID ingahlinzeka ngemisebenzi elandelayo:

1. Hlanganisa izikhala ezimbili noma ngaphezulu ze-hard disk zibe zizonke ukuze ukhuphule izinga lokufunda le-hard disk.

2. Thuthukisa ukubekezelela amaphutha; ukubekezelela iphutha kusho ukuthi uma idatha yonakalisiwe, ungakwazi ukubuyisela idatha eyonakele uma ufaka i-RAID (ngaphandle kwe-RAID0)

Ileveli ye-RAID evamile:

I-RAID ihlukaniswe yaba yi-RAID0, RAID1, RAID2, RAID3, RAID4, RAID5, RAID6. Lawa mazinga ayi-7 angama-RAID ajwayelekile, nawo abonwa yimboni. Izinga elijwayelekile liyisethi eyisisekelo yokucushwa kwe-RAID, kusetshenziswa ubuchwepheshe obufana nokucushwa kwedatha noma ukwenza isibuko. Lawa maleveli ajwayelekile we-RAID angahlanganiswa, futhi i-RAID ehlanganisiwe izoba nokusebenza okuphezulu, ukuphepha, nokuthembeka.

2. Ama-RAID avamile ahlanganisa u-0, 1, 5, no-10. Ake sikhulume ngezinzuzo zawo ezithile

1. I-RAID0 ilula egcina idatha kumadiski amaningi ngemithende. Ayikwazi ukuhlinzeka nganoma yiluphi uhlobo lwesu lokuphinda umsebenzi, okusho ukuthi uma idatha yethu yonakele, i-RAID0 ayikwazi ukubuyiselwa. Nokho, inganikeza izinzuzo ezifana nokusebenza okuphezulu kokufunda nokubhala kanye nokusetshenziswa kwesitoreji esiphezulu. I-RAID0 ivamise ukufanelekela isofthiwe ethile enezidingo zokusebenza ezingcono kodwa engaqini kangako ngokokuphepha kwedatha.

2. I-RAID1 ibizwa nge-mirroring. Kalula nje, ama-hard disk amabili ahlotshisiwe, kodwa ubona kuphela umthamo we-hard disk eyodwa ohlelweni lwekhompyutha. Enye i-hard disk isetshenziselwa ukuvikela idatha. Lapho i-hard disk yokusebenza ihluleka, i-mirrored hard disk izofunda idatha futhi igcwalise igebe.

I-RAID1 imane nje iphambene ne-RAID0. Kuwukwandisa ukuphepha kwedatha ngokufaka isibuko idatha ye-hard disk, ukuze kuzuzwe izinzuzo zokuphepha nokulula. Inezinga eliphelele lokubekezelela amaphutha, kodwa izindleko ziphakeme uma kuqhathaniswa. I-RAID1 isetshenziselwa izinhlelo zokusebenza ezinokusebenza kokulandelana okuphezulu kokufunda nokubhala kanye nokuvikelwa kwedatha, njengokuvikelwa kwedatha yamafayela ezingeni lobumfihlo.

3. I-RAID5 izinga elivame kakhulu. Ingacabangela izinzuzo zokusebenza kwesitoreji nokuphepha kwedatha. Kungaqondwa njengokuvumelana phakathi kuka-0 no-1, futhi kuyisixazululo esisebenza kahle kakhulu kukonke. I-RAID5 ingahlangabezana nezidingo eziningi zesitoreji, futhi izikhungo eziningi zedatha zisebenzisa i-RAID5.

4. I-RAID10 ihlanganisa izinzuzo ze-RAID1 ne-RAID0. Iqala isebenzisa ama-hard disks amabili ukuze idale isithombe sesibuko, bese isiguqulela ngaphakathi. Idatha ye-RAID1 ibhalwa kuma-hard disk arrays amabili ngesikhathi esisodwa. Uma i-hard disk eyodwa ilimele, enye i-hard disk isengaqhubeka nokusebenza, iqinisekise ukusebenza ngenkathi iqinisekisa ukuphepha kwedatha. Kodwa-ke, izinga lokusebenzisa i-hard disk ye-RAID10 lingama-50% kuphela.

3.Yiziphi izinzuzo ze-RAID zamakhompyutha ezimboni?

1. Khulisa izinga lokudlulisa: Ngokusebenzisa amadiski amaningi ngesikhathi esifanayo, ubuchwepheshe be-RAID bungakhuphula kakhulu izinga lokudlulisa idatha yesistimu yokugcina. Kumodi ye-RAID, amadrayivu ediski amaningi angadlulisela idatha ngesikhathi esisodwa, okuvumela isivinini sokufunda nokubhala esiphezulu.

2. Nikeza ukubekezelelana kwamaphutha: Ubuchwepheshe be-RAID buhlinzeka ngokubekezelela amaphutha ngokuphindaphinda idatha kanye nama-algorithms okulungisa amaphutha ukuze kuqinisekiswe ubuqotho nokuthembeka kwedatha. Uma idiski eyodwa yehluleka, isistimu ye-RAID ingasebenzisa idatha kwamanye amadiski ukuze ibuyisele idatha elahlekile, noma ibuyisele ekhophini eyisipele.

3. Khulisa umthamo wokugcina: Ngobuchwepheshe be-striping, i-RAID ingahlakaza futhi igcine idatha kumadiski amaningi, ngaleyo ndlela ikhulise umthamo wokugcina. Isibonelo, ngemva kokusebenzisa ama-hard drive amabili e-1TB ukuze udale imodi ye-RAID 0, umthamo wediski uzozenzakalelayo ube ngu-2TB.

4. Isifinyezo:

Abantu abadinga ukusebenzisa ubuchwepheshe be-RAID ngokuvamile yilabo abadinga ukucubungula inani elikhulu ledatha, baphishekele ukusebenza okuphezulu nokuthembeka, futhi banezidingo eziphezulu zokuvikela idatha.

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