recover database using backup controlfile與 recover database 的區別
要理解recover database using backup controlfile,先理解 recover database
也就是說,不加using backup controlfile的情況。
在普通的recover database 或者 recover tablespace, recover datafile時, Oracle會以當前controlfile所紀錄的SCN為準,利用archive log和 redo log的redo entry, 把相關的datafile 的 block恢復到“當前controlfile所紀錄的SCN”
而某些情況下,Oracle需要把資料恢復到比當前controlfile所紀錄的SCN還要靠後的位置(比如說,control file是backup controlfile , 或者 controlfile是根據trace create的。),這時候,就需要用using backup controlfile. 恢復就不會受“當前controlfile所紀錄的SCN”的限制。
這時候的限制就來自於你的語句(until time , until scn),或者可用的archive log(until cancel) ...
from:
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