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043-017

原创 Linux操作系统 作者:jbymy2000 时间:2012-03-04 13:53:28 0 删除 编辑
17. The current time is 12:00 noon. You want to recover the USERS tab
lespace from a failure that occurred at 11:50 a.m. You discover that
the only member of an unarchived redo log group containing informatio
n from 11:40 a.m. onwards is corrupt.
With reference to this scenario, if you are not using Recovery Manage
r (RMAN),
which recovery method would you use?
A. time-based recovery
B. log sequence recovery
C. cancel-based recovery
D. change-based recovery
Answer: C

不完全恢复有4种。
time_based,cancel_based,change-based,log sequence recovery.
time_based是基于时间的,你得知道你想恢复到什么时间,出问题在什么时间。而且是越快越好的。
cancel_based是让数据库恢复到直到你取消。
change_based是恢复到某个scn
log sequence是恢复到某个日志文件。

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