Video: Peb puas tuaj yeem tsim snapshot rau lwm qhov schema?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Rau tsim a snapshot hauv lwm cov neeg siv schema , koj yuav tsum muaj Tsim NYIAJ SNAPSHOT kev cai lij choj, nrog rau SELECT txoj cai ntawm lub rooj tswv. Tsis tas li ntawd, tus tswv ntawm lub snapshot yuav tsum tau muaj peev xwm tsim tus snapshot.
Tsis tas li ntawd, dab tsi yog snapshot hauv Oracle?
A snapshot yog ib daim ntawv luam tawm tsis ntev los no ntawm ib lub rooj los ntawm db lossis qee zaum, ib pawg ntawm kab / cols ntawm lub rooj. Lawv yog siv los dynamically replicate cov ntaub ntawv ntawm faib databases.
Ib yam li ntawd, lub rooj snapshot yog dab tsi? A snapshot rooj tuav tib yam raw, cov ntaub ntawv hloov pauv raws li nws qhov chaw hauv kev hloov pauv, nrog rau thaj chaw ntxiv rau kev taug qab cov snapshot hnub. Snapshot rooj yog populated hmo ntuj nrog cov kab ntawm cov ntaub ntawv uas pom tau tias zoo (piv txwv li, tam sim no) hauv qhov chaw rooj thaum lub sij hawm extract.
Yog li ntawd, dab tsi yog snapshot nyob rau hauv database?
A database snapshot yog nyeem nkaus xwb, zoo li qub saib ntawm SQL Server database (qhov chaw database ). Cov database snapshot yog pauv raws li qhov chaw database raws li lub caij ntuj no snapshot cov tsim. A database snapshot ib txwm nyob ntawm tib lub server piv txwv li nws qhov chaw database.
Kuv puas tuaj yeem siv snapshot ua tus thaub qab?
Xaus. VM snapshots ib leeg ua tsis tau siv raws li ib txoj kev txhim khu kev qha los tiv thaiv koj cov ntaub ntawv thiab rov qab nws thaum tsis ua hauj lwm, tab sis lawv tau yooj yim heev rau kev sim ceev thiab daws teeb meem. Tsis tas li ntawd, VM snapshot tau ua siv yog hais tias nws yog ib feem ntawm ib qho kev qhia ua ntu zus ntawm cov xwm txheej rau ua a thaub qab los yog ib txoj hauj lwm replication.
Pom zoo:
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