question no: 144 w' `0 u) `7 r" d' z1 Y
after running the configure retention policy to recovery window of 7 days command, what has been accomplished? 7 |( U* h* ~; q8 Z, Y: Qa. retain the data file backup for 7 days.3 S+ P. f; p; R& _* |+ k9 f' Z6 m
b. run the recover process every 7 days.. ]+ S. S. ?) \" Y
c. destroy the physical backup files every 7 days. % m7 P! i7 C9 Z$ _% h" m% N$ bd. destroy the physical backup files older than 7 days.8 h% _+ E' g% b" e0 f$ F
e. retain one backup of each data file for at least 7 days.2 e1 @4 ^9 U* n2 O: Z6 K6 F- H: o
f. keep the catalog information in the control file for 7 days.; S/ ?; j2 v1 ]# {7 A% d9 }* E
答案是 e，+ ? N. f: V9 ]
请问a，e 有什么区别吗？) i% P: ^* Q! b- j: ^
解答:' G0 n5 Q/ x( O2 U: U
如果在 7 天內還沒有新的備份，那麼即使舊的備份已超過 7 天，但仍然還是要保留的。這就是 a 與 e 的不同之處。 8 b. m$ w+ C8 j2 k" u答案是e4 u+ q5 B8 R! V( w8 T+ l
a是說 db 的datafile , P2 g7 q- [8 D& O: \( ?$ K1 F i3 pe是說 backup set 的datafile retention policy 是定義backup保存的時間 所以答案是e
发表于 2012-8-4 14:01:27
