Zolwazi bahambisa

Saa, okanye, ukuba libe lichanekile ukubiza, ledatha asasazwa - ukuba uvimba ezinjalo, equka inani iikhompyutha eziqhagamshelene womnatha, nganye isebenza database yasekuhlaleni. Wokuhlangana zonke ezi software ne-hardware kudala database esabelana. OluHanjiswa database ngaphandle ibukeka ledatha eziqhelekileyo ekuhlaleni, ngaba isimo sabo iintsimbi ayibonakali kubasebenzisi. inkqubo yolawulo Distributed ulawula zonke iindawo zokugcina kwaye inikeza lwedatha.

Kristofer Deyt, eyaziwa ingcali ledatha sokuba ludumo yehlabathi, ichonge iinkalo eziphambili elinambini ukuba abe zonke iinkcukacha zahanjiswa: 1) Inkululeko zasekuhlaleni, 2) ngaxeshanye, 3) iindawo ezizimeleyo, 4) oluselubala eqhekekileyo, 5) ingcaciso yale indawo, 6) phambili imibuzo ethile, 7) phindana transparent, 8) elizimeleyo ezi zixhobo, 9) yasasazwa processing transaction, 10) elubala womnatha, 11) elizimeleyo kwinkqubo yokusebenza 12) elizimeleyo zolwazi ekhethiweyo.

Cinga iimpawu eziziintloko, ngokutsho Data, ziya kuba zonke iinkcukacha asasazwa, iinkcukacha ezingakumbi.

Inkululeko Local kuthetha ukuba ngeyunithi nganye ngokuzimeleyo ilawula iinkcukacha kwesiseko salo.

operation oluqhubekayo. Ngelo xesha K. Umhla kuthiwa ufikelelo idata kufuneka kubonelelwa rhoqo, kwaye akukhathaliseki nokuba zisendaweni na node. Kwakhona, kufuneka akunamsebenzi ukuba nawuphi na umsebenzi lwenziwa ngalo mzuzu iziko ledatha yasekuhlaleni.

nodes Independent. Xa inkqubo efanelekileyo, zonke iindawo bayalingana kwaye luzimele omnye komnye. database nganye ibekwe kwi esiludumbo linikezela data kwindawo ekwabelwana kunye namalungelo afanayo. Zonke iinkcukacha ukwenza iziko ledatha asasazwa, noziqulathe-yaye bakhuselekile kusebenziso olungavumelekanga.

Transparent ukuqhekeka. Olu phawu kufuna inkxaso ledatha yangaphakathi ukubekwa bahambisa data ukuba bayakwazi mnye.

indawo elubala. Abasebenzisi ukufikelela kuzo iinkcukacha asasaza, ukuba bangamazi ndinento node ifumaneka ngokwasemzimbeni kuyo ulwazi olufunekayo.

Kusasazwa Query Processing. Weenkcukacha kufuneka baqhube kuthunyelwa imibuzo kwi SQL isampula.

ukuphindaphindeka transparent. Ngokubanzi, kuye kwasasazwa - na utshintsho izinto zatshintsha ukusuka database omnye komnye. Xa umongo wale nto ukuthini ukutshintshwa data phakathi nodes ngeendlela eziqinisekisa ukuba lokungabonakali ezi zenzo kumsebenzisi.

Hardware ukuzimela kuthetha ukuba kuphuma ezisasaziweyo network database uyakwazi ukwenza nayiphi na computer.

Uqwalaselo iintengiselwano ezisasaziweyo iphathwa njenge ndlela sokugqiba uvimba asasazwa usebenzisa imiyalelo egqityiwe, SUSA, INSERT, ngexesha ngokubulawa leyo bungalahleki kwesinomhlwa ukuthembeka ukuvumelana ulwazi olugcinwe kwiziko ledatha.

Ukuzimela evela kwinkqubo yokusebenza luthatha ukuba izakhi kwisistim ukuqhuba nayiphi na inkqubo yokusebenza.

elubala Network kuthetha ukuba ukufikelela kuzo zonke izinto kovimba weenkcukacha kwasasazwa kufuna kuphela uqhagamshelo womnatha.

Ukuzimela evela kwiziko ledatha. Oku inkalo ebalulekileyo nkqubo ifuna ubuchule ukusebenza zonke iinkcukacha zisasazwe kubathengisi ezahlukeneyo, kuqukwa namathuba kufuneka zifumaneke uphendlo nohlaziyo.

Njengoko ubona, inkcazelo K. Data ye sedata asasazwa iyichaza isakhiwo ngemixokelelwane babuthathaka, eziquka iindawo ezizimeleyo zolwazi zasekuhlaleni. Ezi LBD izimele, kunye nokunika ukufikelela kwiziseko zedata asuka kubathengisi ezahlukeneyo. Iindawo benza uqhagamshelwano phakathi ukuba data phindeka. Le ithopholoji kweziko ledatha kwasasazwa yakha inkqubo yolwazi kunye ukukotshwa data ukungena nokuphuma eendawo.