Video: Dab tsi yog txias thaub qab thiab kub thaub qab?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Qhov txawv ntawm a kub thaub qab thiab a txias thaub qab hauv oracle. A txias thaub qab ua tiav thaum tsis muaj cov neeg siv kev ua haujlwm mus nrog lub system. Kuj hu ua offline thaub qab , yog noj thaum lub database tsis khiav thiab tsis muaj cov neeg siv nkag rau hauv. A kub thaub qab yog noj thaum lub database xav tau khiav txhua lub sijhawm.
Ntxiv mus, dab tsi yog qhov kub thaub qab?
Kub thaub qab , tseem hu ua dynamic lossis online thaub qab , yog a thaub qab ua rau cov ntaub ntawv thaum lub database nquag hauv online thiab nkag tau rau cov neeg siv. A kub thaub qab yog tus txheej txheem ntawm kev ua feem ntau database thaub qab . Oracle yog tus neeg muag khoom tseem ceeb ntawm cov txheej txheem, tab sis lub tuam txhab tsis muaj kev ywj pheej ntawm lub tswv yim.
Ib sab saum toj no, RMAN txias thaub qab yog dab tsi? Ua tsis tiav / Ua tiav rov qab siv RMAN txias thaub qab . Offline thaub qab (tseem hu ua Txias los yog zoo ib yam thaub qab ) raug coj mus rau thaum lub chaw khaws ntaub ntawv nyob rau hauv ib qho xwm txheej, piv txwv li cov ntaub ntawv tau raug kaw nrog SHUTDOWN NORMAL, SHUTDOWN IMMEDIATE, lossis SHUTDOWN TRANSACTIONAL commands.
Kuj nug, dab tsi yog txias thaub qab thiab kub thaub qab hauv SQL Server?
A txias database thaub qab yog thaum koj ua ib qho yooj yim luam ntawm cov ntaub ntawv thiab cav cov ntaub ntawv. Txhawm rau ua qhov no, cov ntaub ntawv yuav tsum raug coj mus offline ua ntej. Qhov no yog qhov opposite rau lub kub database thaub qab uas yog qhov tsis tu ncua thaub qab ua tau thaum lub database tseem siv. Hauv SQL Server nws yog feem ntau ua nrog Thaub qab DATABASE hais kom ua.
Qhov chaw thaub qab hom twg muaj lub sijhawm rov qab sai tshaj plaws?
Ib kub qhov chaw thaub qab yog tag nrho duplicate ntawm qhov chaw cov ntaub ntawv, yog li ntawd muaj lub sij hawm rov qab sai tshaj plaws tab sis kuj yog tus nqi siab tshaj. Qhov sov qhov chaw yog scaled-down kub qhov chaw , uas suav nrog cov hauv paus zoo li lub zog, kev sib txuas lus, thiab kev sib txuas lus uas ua haujlwm txhua sij hawm.
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