Uhlobo yokukhetha

Enye yeendlela ezibalulekileyo ukusebenza kunye data ihlelwa. ukusetyenziswa kwayo nje kuphela ngokukhawuleza, kodwa kwakhona lula kakhulu ukuba kuyimfuneko yaye kubalulekile kwinkqubo iinkqubo. Nciphisa kukhukuliswa le ngcamango kwi phakathi badwelisi benkqubo na udidi lweerekhodi kwiziko ledatha.

iindlela Ukuhlela ezihambelana namhla, nangona inkqubela zeteknoloji enobutyebi iindlela zale mihla zokusebenza izixhobo zekhompyutha. Abadume yakhe Scientist endle D. Knuth lithi phantse isiqingatha ixesha lokuba basebenze data yokwenza sixakekile ukkhetho kakuhle nabo. Uveza izizathu ezithathu ezicacisa le ndlela iziganeko:

1. Ukhetho Hlela kunye nezinye iindlela isetyenziswa ngokubanzi kakhulu.
2. algorithm yayo isoloko isetyenziswa ngaphandle abaneemfuno ezizodwa.
3. Ukuze kuphunyezwe iinjongo kusetyenziswa imodeli abangafezekanga.

Ukuze kukhawuleziswe inkqubo yokuqulunqwa koMthetho data, kuqala kufuneka ukufumana isisombululo kwezi ngxaki. Program zizama ukwenza isakhiwo ukuba ngokwalo kusebenzisa ubuchule xa kuyimfuneko. Ukuba idaliwe, kukhawulezisa kakhulu umsebenzi kunye umthamo omkhulu data kwaye kuya kubakho izibonelelo yogcino computing omkhulu. Kodwa kude kube lelo kwenzeka, yaye siya kujonga ezikhoyo ukuhlela iindlela.

Bonke bephela zahlulwe zibe bangaphakathi kunye nabangaphandle. Kakuhle eli indlela yokuqala kukuba zonke iirekhodi ezibekwe, zibekwe kukhunjulwa matshini. Kodwa xa ingakufuni iinkqubo lokhetho lwangaphandle, yaye ngokufuthi ukuba zisekelwe phezu yokuqala yezi ndlela, kunye nezongezelelo nje ezingephi.

Uhlobo khetho, nto leyo eza kuxoxwa inxulumene ngaphakathi. Kuyimfuneko ukuba ayeke phezu kwayo iinkcukacha ngakumbi, njengoko oku hlobo processing ikuvumela ukuba ukulungisa eguquguqukayo ngakumbi inzuzo. iindlela zayo yahlulwe ngamaqela eziphambili 4:

1. uhlobo Ukufakwa.
2. ukubala processing.
3. inkqubo Exchange.
4. Ukhetho Hlela.

Kufuneka kuqatshelwe ukuba akukho umahluko ocacileyo phakathi kwabo bobabini, ukuba ziyajongwa uyahambelana kwaye efana kakhulu omnye komnye. Oku kukhokelela kubukho uqhagamshelwano article umsebenzi wabo. Umzekelo elula yokusebenza lweenkcukacha yenza yokuhlela ukubala. Kuba ngathi sisiseko kwabanye, kodwa namhlanje esetyenziswa enqabile. Enye indlela - faka - kubaluleke kakhulu. ingcamango yakhe yeyokuba sijongene ngokukodwa isitshixo kubekwa phezu kwesihlalo amaqashiso. Kodwa apha kukho iqela bajonga iingxaki kwaye kakubi kuchaphazela umsebenzi inani elikhulu kweerekhodi. iindlela ezininzi bemveliso kakhulu processing data zikhona Exchange Uhlobo. Ethandwa kakhulu kwaye ecacileyo kweli qela - ekuthiwa indlela kwiqamza. Umsebenzi kuwo isekelwe algorithm ilandelayo: uthelekiso loshicilelo ngalinye wenza njalo, kwaye ukuba ixabiso lokuqala kubo ngakumbi ke lize nje. Le nkqubo iya ku-odola ngokupheleleyo.

Kwaye ekugqibeleni, enye yezinto ezibalulekileyo, kodwa kwangaxeshanye processing iindlela ezilula database - ukhetho yokuhlela. Njengoko kukhankanyiwe ngasentla, libhekisela kwiqela lwangaphakathi olusekelwe phezu oko elidityaniswe iintlobo eziliqela. Kakuhle eli indlela - ukhetho, elementi enye ezininzi. Izenzo lwenziwa ngendlela ilandelayo: zincinane ikhethiwe ukusuka umba kuluhlu, ngoko ke kufuneka zithunyelwe kule ndawo imveliso kunye nexabiso lalo loguqulelo yi ngaphezu kwabanye. Ulandelelwano yezenzo iyaphindwa de ukhetho olupheleleyo lwazo zonke iinkcukacha kuluhlu.

Kucacile ukuba ukuphunyezwa algorithm zifuna ukubonakala lweziqalelo zonke yaye, ukongeza, intsimi, iinkcukacha zokugqiba kwabo. Kwaye apha kukho ndlela yendalo - yokuhlela ukhetho elula, ukuba laphula uluhlu ibe eziliqela. Xa kufuneka ukhethe i element incinane uluhlu kwaye ukutshintsha iindawo kunye naye kuqala. Phezu kwabo imiba kwakhona benza zazo lungqinelane ngokupheleleyo.