我看到使用“格式关键字” RMAN的备份数据库“命令的不同的输出或行为时，我在中间保持语法部分一次，到底另一方面，它在不同的位置，如在下面的情况下提到的存储备份
在下面的情况下，1 - I用于在中间格式的关键字，并将其保存在所定义的位置的备份集，但是如果我使用相同的命令格式与关键字到底它存储在ORACLE_HOME / DBS位置的备份片段。不知道，为什么会做到这一点。任何想法将是非常可观的。
注： - FRA参数并不像以前它是在备份片存储到FRA位置，同时使用案例2启用。
案例1： - 使用中间格式关键字。
RMAN> backup format '/o/export/export/cold_test/backup_%U_%u_%t_%d' incremental level 0 database plus archivelog ;
Starting backup at 04-FEB-19
current log archived
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=283 device type=DISK
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=16 RECID=16 STAMP=999351604
input archived log thread=1 sequence=17 RECID=17 STAMP=999351609
input archived log thread=1 sequence=18 RECID=18 STAMP=999351923
channel ORA_DISK_1: starting piece 1 at 04-FEB-19
channel ORA_DISK_1: finished piece 1 at 04-FEB-19
piece handle=/o/export/export/cold_test/backup_1stp1pjj_1_1_1stp1pjj_999351923_TEST tag=TAG20190204T134523 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 04-FEB-19
Starting backup at 04-FEB-19
using channel ORA_DISK_1
channel ORA_DISK_1: starting incremental level 0 datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00002 name=+DATA_01/TEST/DATAFILE/tnext_indx.dbf
input datafile file number=00005 name=+DATA_01/TEST/DATAFILE/tnext_data.dbf
input datafile file number=00007 name=+DATA_01/TEST/DATAFILE/tnext_data02.dbf
input datafile file number=00008 name=+DATA_01/TEST/DATAFILE/tnext_data03.dbf
input datafile file number=00003 name=+DATA_01/TEST/DATAFILE/sysaux.dbf
input datafile file number=00001 name=+DATA_01/TEST/DATAFILE/system.dbf
input datafile file number=00004 name=+DATA_01/TEST/DATAFILE/undotbs1.dbf
input datafile file number=00006 name=+DATA_01/TEST/DATAFILE/users.dbf
channel ORA_DISK_1: starting piece 1 at 04-FEB-19
channel ORA_DISK_1: finished piece 1 at 04-FEB-19
piece handle=/o/export/export/cold_test/backup_1ttp1pjk_1_1_1ttp1pjk_999351924_TEST tag=TAG20190204T134524 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:07
channel ORA_DISK_1: starting incremental level 0 datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
including current control file in backup set
channel ORA_DISK_1: starting piece 1 at 04-FEB-19
channel ORA_DISK_1: finished piece 1 at 04-FEB-19
piece handle=/o/export/export/cold_test/backup_1utp1pjr_1_1_1utp1pjr_999351931_TEST tag=TAG20190204T134524 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 04-FEB-19
Starting backup at 04-FEB-19
current log archived
using channel ORA_DISK_1
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=19 RECID=19 STAMP=999351933
channel ORA_DISK_1: starting piece 1 at 04-FEB-19
channel ORA_DISK_1: finished piece 1 at 04-FEB-19
piece handle=/o/export/export/cold_test/backup_1vtp1pjt_1_1_1vtp1pjt_999351933_TEST tag=TAG20190204T134533 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 04-FEB-19
RMAN>
案例2：使用备份命令结束的格式关键字。
RMAN> backup incremental level 0 database plus archivelog format '/o/export/export/cold_test/backup_%U_%u_%t_%d' ;
Starting backup at 04-FEB-19
current log archived
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=283 device type=DISK
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=16 RECID=16 STAMP=999351604
input archived log thread=1 sequence=17 RECID=17 STAMP=999351609
input archived log thread=1 sequence=18 RECID=18 STAMP=999351923
input archived log thread=1 sequence=19 RECID=19 STAMP=999351933
input archived log thread=1 sequence=20 RECID=20 STAMP=999352079
input archived log thread=1 sequence=21 RECID=21 STAMP=999352087
input archived log thread=1 sequence=22 RECID=22 STAMP=999358913
channel ORA_DISK_1: starting piece 1 at 04-FEB-19
channel ORA_DISK_1: finished piece 1 at 04-FEB-19
piece handle=/o/export/export/cold_test/backup_29tp20e1_1_1_29tp20e1_999358913_TEST tag=TAG20190204T154153 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 04-FEB-19
Starting backup at 04-FEB-19
using channel ORA_DISK_1
channel ORA_DISK_1: starting incremental level 0 datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00002 name=+DATA_01/TEST/DATAFILE/tnext_indx.dbf
input datafile file number=00005 name=+DATA_01/TEST/DATAFILE/tnext_data.dbf
input datafile file number=00007 name=+DATA_01/TEST/DATAFILE/tnext_data02.dbf
input datafile file number=00008 name=+DATA_01/TEST/DATAFILE/tnext_data03.dbf
input datafile file number=00003 name=+DATA_01/TEST/DATAFILE/sysaux.dbf
input datafile file number=00001 name=+DATA_01/TEST/DATAFILE/system.dbf
input datafile file number=00004 name=+DATA_01/TEST/DATAFILE/undotbs1.dbf
input datafile file number=00006 name=+DATA_01/TEST/DATAFILE/users.dbf
channel ORA_DISK_1: starting piece 1 at 04-FEB-19
channel ORA_DISK_1: finished piece 1 at 04-FEB-19
piece handle=/o/oracle/DB12102/dbs/2atp20e2_1_1 tag=TAG20190204T154154 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:03
channel ORA_DISK_1: starting incremental level 0 datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
including current control file in backup set
channel ORA_DISK_1: starting piece 1 at 04-FEB-19
channel ORA_DISK_1: finished piece 1 at 04-FEB-19
piece handle=/o/oracle/DB12102/dbs/2btp20e6_1_1 tag=TAG20190204T154154 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 04-FEB-19
Starting backup at 04-FEB-19
current log archived
using channel ORA_DISK_1
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=23 RECID=23 STAMP=999358920
channel ORA_DISK_1: starting piece 1 at 04-FEB-19
channel ORA_DISK_1: finished piece 1 at 04-FEB-19
piece handle=/o/export/export/cold_test/backup_2ctp20e8_1_1_2ctp20e8_999358920_TEST tag=TAG20190204T154200 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 04-FEB-19
RMAN>
谢谢，DBA
备份命令包含两个密钥文件格式。第一个关键格式定义的位置和数据库本身的备份文件格式，第二密钥格式定义归档日志备份文件的位置和格式。
RMAN> backup format '/o/export/export/cold_test/backup_%U_%u_%t_%d' incremental level 0 database plus archivelog format '/o/export/export/cold_test/backup_%U_%u_%t_%d' ;