没有使用catalog时，rman中的所有配置信息都会记入在 控制文件中
没有使用catalog时，，rman中的所有配置信息都会记入在 控制文件中
控制文件中dump出来的信息：
***************************************************************************
rman configuration records
***************************************************************************
(size = 1108, compat size = 1108, section max = 50, section in-use = 2,
last-recid= 4, old-recno = 0, last-recno = 0)
(extent = 1, blkno = 91, numrecs = 50)
controlfile autobackup:on recno=1
channel:device type disk format '/home/oracle/backup/%u' recno=2 
rman中配置的信息
rman> show all
2> ;
using target database control file instead of recovery catalog
rman configuration parameters for database with db_unique_name mynewdb are:
configure retention policy to redundancy 1; # default
configure backup optimization off; # default
configure default device type to disk; # default
configure controlfile autobackup on;
configure controlfile autobackup format for device type disk to '%f'; # default
configure device type disk parallelism 1 backup type to backupset; # default
configure datafile backup copies for device type disk to 1; # default
configure archivelog backup copies for device type disk to 1; # default
configure channel device type disk format '/home/oracle/backup/%u';
configure maxsetsize to unlimited; # default
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