1Z0-067 · Question #169
Which three statements are true about compression of backup sets?
The correct answer is B. Binary compression creates performance overhead during a backup operation. C. Unused blocks below the high-water mark are not backed up. E. It works only for locally managed tablespaces. https://docs.oracle.com/cd/B19306_01/backup.102/b14194/rcmsynta009.htm#i1015382 "RMAN also skips other datafile blocks that do not currently contain data, if all of the following conditions apply: The COMPATIBLE initialization parameter is set to 10.2 There are currently no…
Question
Which three statements are true about compression of backup sets?
Options
- ACompressed backups can only be written to media.
- BBinary compression creates performance overhead during a backup operation.
- CUnused blocks below the high-water mark are not backed up.
- DCompressed backups cannot have section size defined during a backup operation
- EIt works only for locally managed tablespaces.
How the community answered
(28 responses)- A7% (2)
- B79% (22)
- D14% (4)
Explanation
https://docs.oracle.com/cd/B19306_01/backup.102/b14194/rcmsynta009.htm#i1015382 "RMAN also skips other datafile blocks that do not currently contain data, if all of the following conditions apply: The COMPATIBLE initialization parameter is set to 10.2 There are currently no guaranteed restore points defined for the database The datafile is locally managed The datafile is being backed up to a backup set as part of a full backup or a level 0 incremental The backup set is being created on disk.
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