Ngokuvamile, ama-disk noma ama-disk array asebenza kahle kakhulu esimweni sokuxhuma komsingathi oyedwa. Amasistimu amaningi okusebenza asekelwe ezinhlelweni zamafayela akhethekile, okusho ukuthi isistimu yefayela ingaba umnikazi wesistimu eyodwa kuphela. Ngenxa yalokho, kokubili isistimu yokusebenza kanye nesofthiwe yohlelo lokusebenza ithuthukisa ukufunda nokubhala idatha yesistimu yokugcina idiski ngokusekelwe kuzici zayo. Lokhu kulungiselelwa kuhloswe ukunciphisa izikhathi zokufuna ngokomzimba kanye nokunciphisa izikhathi zokuphendula ngomshini wediski. Izicelo zedatha eziphuma kunqubo yohlelo ngalunye zisingathwa isistimu yokusebenza, okuholela ekufundweni nasekubhaleni kwedatha elungiselelwe kahle futhi ehlelekile izicelo zediski noma idiski yohlu. Lokhu kuholela ekusebenzeni okuhle kakhulu kwesistimu yesitoreji kulokhu kusetha.
Okwamaqoqo ediski, nakuba isilawuli esengeziwe se-RAID sengeziwe phakathi kwesistimu yokusebenza namadrayivu ediski ngamanye, abalawuli bamanje be-RAID ngokuyinhloko baphatha futhi baqinisekise imisebenzi yokubekezelela iphutha lediski. Azenzi isicelo sokuhlanganisa, ukuhlela kabusha, noma ukulungiselelwa kwedatha. Izilawuli ze-RAID ziklanywe ngokusekelwe ekucabangeni ukuthi izicelo zedatha zivela kumsingathi oyedwa, osevele ulungiselelwe futhi wahlungwa ngesistimu yokusebenza. Inqolobane yesilawuli ihlinzeka kuphela ngamakhono okugcina aqondile nawekhompuyutha, ngaphandle kokubeka idatha kumugqa ukuze kusetshenziswe ngokugcwele. Lapho i-cache igcwaliswa ngokushesha, isivinini siyancipha ngokushesha ukuya esivinini sangempela sokusebenza kwediski.
Umsebenzi oyinhloko wesilawuli se-RAID uwukudala idiski elilodwa noma amaningi amakhulu amelana nephutha kumadiski amaningi futhi kuthuthukiswe isivinini sokufunda nokubhala kwedatha iyonke kusetshenziswa isici sokulondoloza inqolobane kudiski ngayinye. Inqolobane efundwayo yezilawuli ze-RAID ithuthukisa kakhulu ukusebenza kokufundwa kweqoqo lediski lapho idatha efanayo ifundwa ngesikhathi esifushane. Isivinini sangempela sokufunda nokubhala salo lonke uhlobo lwediski lunqunyelwe inani eliphansi kakhulu phakathi komkhawulokudonsa wesiteshi sokusingatha, ukubala kokuqinisekisa kwesilawuli se-CPU namandla okulawula uhlelo (injini ye-RAID), umkhawulokudonsa wesiteshi sediski, nokusebenza kwediski (ukusebenza kwangempela okuhlanganisiwe wonke amadiski). Ukwengeza, ukungafani phakathi kwesisekelo sokuthuthukisa sezicelo zedatha yesistimu yokusebenza kanye nefomethi ye-RAID, njengosayizi webhulokhi wezicelo ze-I/O ezingahambelani nosayizi wengxenye ye-RAID, kungaba nomthelela omkhulu ekusebenzeni kweqoqo lediski.
Izinguquko Zokusebenza Kwezinhlelo Zokugcina Ze-Traditional Disk Array ku-Multiple Host Access
Ezimeni eziningi zokufinyelela kosokhaya, ukusebenza kweqoqo lediski kuyehla uma kuqhathaniswa noxhumo lomsingathi oyedwa. Ezinhlelweni zesitoreji samalungu afanayo ediski amancane, ngokuvamile anepheya eyodwa noma engasadingeki yezilawuli zeqoqo lediski kanye nenani elilinganiselwe lamadiski axhunyiwe, ukusebenza kuthintwa ukugeleza kwedatha okungahlelekile kusuka kubasingathi abahlukahlukene. Lokhu kuholela ekwandeni kwezikhathi zokufunwa kwediski, unhlokweni wengxenye yedatha nolwazi lomsila, kanye nokuhlukaniswa kwedatha ukuze kufundwe, kuhlanganiswe, izibalo zokuqinisekisa, nezinqubo zokubhala kabusha. Ngenxa yalokho, ukusebenza kwesitoreji kuncipha njengoba ababungazi abaningi bexhunyiwe.
Ezinhlelweni zokugcinwa kohlu lwamadiski amakhulu, ukuwohloka kokusebenza kuhlukile kulokho kwezinhlaka zamadiski anezinga elincane. Lawa masistimu amakhulu asebenzisa isakhiwo sebhasi noma isakhiwo sokushintshwa kwephoyinti eliwela ukuxhuma amasistimu angaphansi amaningi esitoreji (ama-disk array) futhi afaka ama-cache amakhulu kanye namamojula oxhumano lomsingathi (afana namahabhu eziteshi noma amaswishi) ukuze uthole ababungazi abengeziwe ngaphakathi kwebhasi noma ukushintsha. isakhiwo. Ukusebenza kuncike kakhulu kunqolobane ekucubunguleni izinhlelo zokusebenza kodwa kunokusebenza okulinganiselwe kuzimo zedatha ye-multimedia. Ngenkathi amasistimu angaphansi we-disk array yangaphakathi kulezi zinhlelo ezinkulu zisebenza ngokuzimele, iyunithi eyodwa enengqondo yakhiwe kuphela ngaphakathi kwesistimu engaphansi yediski eyodwa. Ngakho, ukusebenza kweyunithi eyodwa enengqondo kuhlala kuphansi.
Sengiphetha, ama-arrays amancane amadiski ahlangabezana nokwehla kokusebenza ngenxa yokugeleza kwedatha okungahlelekile, kuyilapho ama-disk anesilinganiso esikhulu esinamasistimu angaphansi amaningi azimele wediski angasekela abasingathi abaningi kodwa abhekane nemikhawulo yezinhlelo zokusebenza zedatha ye-multimedia. Ngakolunye uhlangothi, izinhlelo zokugcina ze-NAS ezisekelwe kubuchwepheshe be-RAID bendabuko nokusebenzisa izivumelwano ze-NFS ne-CIFS ukwabelana ngesitoreji nabasebenzisi bangaphandle ngoxhumo lwe-Ethernet zithola ukuwohloka kokusebenza okuncane ezindaweni eziningi zokufinyelela zabasingathi. Izinhlelo zokugcina ze-NAS zithuthukisa ukudluliswa kwedatha zisebenzisa ukudluliselwa kwe-TCP/IP okuhambisanayo okuningi, okuvumela isivinini esikhulu okwabelwana ngaso esingaba ngu-60 MB/s ohlelweni olulodwa lokulondoloza lwe-NAS. Ukusetshenziswa kokuxhumana kwe-Ethernet kwenza idatha ibhalwe kahle ohlelweni lwediski ngemva kokuphathwa nokuhlelwa kabusha yisistimu yokusebenza noma isofthiwe yokuphatha idatha kuseva encane. Ngakho-ke, isistimu yediski ngokwayo ayizwani nokucekelwa phansi kokusebenza okuphawulekayo, okwenza isitoreji se-NAS sifanelekele izinhlelo zokusebenza ezidinga ukwabelana ngedatha.
Isikhathi sokuthumela: Jul-17-2023
