Cov txheej txheem:
Video: Dab tsi yog cov teeb meem ntawm kev tswj cov ntaub ntawv hauv cov ntaub ntawv ib txwm muaj?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Sij hawm dhau mus, qhov kev tswj cov ntaub ntawv ib txwm muaj ib puag ncig tsim teeb meem xws li cov ntaub ntawv redundancy thiab inconsistency, program-data dependence, inflexibility, tsis zoo kev ruaj ntseg , thiab tsis muaj cov ntaub ntawv sib qhia thiab muaj.
Ua li no, dab tsi yog teeb meem nrog cov ntaub ntawv ib txwm muaj?
Teeb meem tshwm sim los ntawm cov ntaub ntawv ib puag ncig muaj xws li: Data redundancy: duplicate cov ntaub ntawv inmultiple cov ntaub ntawv , ua rau cov ntaub ntawv tsis sib xws, cov nqi sib txawv siv rau tib tus cwj pwm. Program-data dependency: Hloov cov kev pab cuam yuav tsum hloov cov ntaub ntawv. Tsis muaj kev ywj pheej.
Kuj Paub, dab tsi yog cov ntaub ntawv ib txwm siv? Cov tsoos ua ntaub ntawv qhov system (TFS) yog ib txoj hauv kev khaws cia thiab teeb tsa lub computer cov ntaub ntawv thiab cov ntaub ntawv hauv lub ntaub ntawv (cov ntaub ntawv). Yeej nws npaj cov no cov ntaub ntawv nyob rau hauv ib tug database rau kev cia, koom haum, manipulation, thiab retrieval los ntawm lub computer kev khiav hauj lwm qhov system.
Tsuas yog li ntawd, cov teeb meem dab tsi ua cov kev tswj hwm database daws tau?
Ntawm no yog tsib ntawm cov saum toj kawg nkaus kev tswj hwm kev sib tw cov tuam txhab lag luam ntsib
- Loj hlob complexity nyob rau hauv toj roob hauv pes.
- Kev txwv ntawm scalability.
- Nce cov ntaub ntawv ntim.
- Cov ntaub ntawv kev ruaj ntseg.
- Decentralized tswj cov ntaub ntawv.
- Tsim kom muaj kev txiav txim siab.
- Ua raws li kev daws teeb meem rau koj lub hom phiaj kev lag luam.
- Nws puas ua haujlwm nrog koj cov thev naus laus zis uas twb muaj lawm?
Dab tsi yog teeb meem kev ncaj ncees nyob rau hauv cov ntaub ntawv system?
Teeb meem kev ncaj ncees Cov teeb meem nrog cov ntaub ntawv kev ncaj ncees yog lwm qhov tsis zoo ntawm kev siv a ntaub ntawv -raws li qhov system . Nws hais txog kev saib xyuas thiab kev lees paub tias cov ntaub ntawv hauv cov ntaub ntawv muaj tseeb thiab zoo ib yam. Cov ntaub ntawv tseem ceeb yuav tsum ua raws li qee qhov kev txwv tsis sib xws uas tau teev tseg hauv cov ntawv thov.
Pom zoo:
Muaj pes tsawg txoj kev daws teeb meem tuaj yeem muaj teeb meem LP?
"Tsis yog, nws tsis tuaj yeem ua rau tus qauv LP kom muaj ob qho kev daws teeb meem zoo." Tus qauv LP tuaj yeem muaj 1 qhov kev daws teeb meem zoo tshaj plaws lossis ntau dua 1 qhov kev daws teeb meem zoo, tab sis nws tsis tuaj yeem muaj 2 qhov kev daws teeb meem zoo
Dab tsi yog peb qhov tseem ceeb ntawm cov ntaub ntawv los daws cov teeb meem tshawb fawb txog kev lag luam?
Peb qhov chaw ntawm kev paub txog kev lag luam yog cov ntaub ntawv sab hauv, cov ntaub ntawv tseem ceeb, thiab cov ntaub ntawv thib ob. Cov ntaub ntawv sab hauv yog qhov zoo tshaj plaws rau kev saib xyuas kev muag khoom, sib qhia, thiab cov hom phiaj ntawm kev lag luam
Dab tsi yog qee qhov teeb meem kev coj ncaj ncees thiab teeb meem cuam tshuam nrog khoos phis tawj thiab kev sib txuas lus hluav taws xob?
Qee qhov teeb meem no yog qhov tshiab (xws li luam theej duab software), thaum lwm tus yog cov tshiab version ntawm cov teeb meem qub txog qhov raug thiab tsis ncaj ncees, kev ncaj ncees, kev ncaj ncees, lub luag haujlwm, tsis pub lwm tus paub, kev ntseeg siab, kev lav phib xaub, thiab kev ncaj ncees. Cov neeg siv ntsib qee qhov teeb meem no thaum cov kws tshaj lij hauv computer ntsib tag nrho lawv
Kev tswj hwm kev tswj hwm hauv kev ruaj ntseg ntaub ntawv yog dab tsi?
Kev tswj hwm kev nyab xeeb (tseem hu ua cov txheej txheem tswj hwm) feem ntau yog cov txheej txheem thiab cov cai uas tau muab tso rau hauv qhov chaw los txheeb xyuas thiab qhia cov neeg ua haujlwm hauv kev cuam tshuam nrog cov koom haum cov ntaub ntawv rhiab
Dab tsi yog qhov xav tau rau cov chav kawm paub daws teeb meem thiab kev paub daws teeb meem?
Cov chav kawm Abstract. Abstract (uas Java txhawb nrog cov ntsiab lus paub daws teeb meem) txhais tau hais tias chav kawm lossis txoj hauv kev lossis teb lossis txhua yam tsis tuaj yeem ua tam sim (uas yog, tsim) qhov twg nws tau txhais. Lwm yam khoom yuav tsum instantiate cov khoom nyob rau hauv nqe lus nug. Yog tias koj ua ib chav kawm abstract, koj tsis tuaj yeem instantiate ib yam khoom los ntawm nws