A.Compressed backups can only be taken on the tape drives.
B.The binary compression creates some performance overhead during backup operation.
C.The ZLIB compression algorithm can be used only if the COMPATIBLE initialization parameter is set to 11.1.0.
D.The media manager compression for the tape drive should be enabled for taking compressed backups on the tape.
Answer:BD
A错，压缩备份也可以备份在DISK上。
C错，应该是11.0.0及以上。
SQL> select
2 ALGORITHM_NAME,ALGORITHM_COMPATIBILITY,ALGORITHM_DESCRIPTION from
3 v$rman_compression_algorithm;
ALGORITHM_NAME ALGORITHM_COMPATIB ALGORITHM_DESCRIPTION
------------------------------ ------------------ -----------------------------------------------
BZIP2 9.2.0.0.0 good compression ratio
BASIC 9.2.0.0.0 good compression ratio
LOW 11.2.0.0.0 maximum possible compression speed
ZLIB 11.0.0.0.0 balance between speed and compression ratio
MEDIUM 11.0.0.0.0 balance between speed and compression ratio
HIGH 11.2.0.0.0 maximum possible compression ratio
已选择6行。
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