1、rman默认配置参数

CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 3 DAYS;
CONFIGURE BACKUP OPTIMIZATION ON;
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP ON; # default
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE SBT_TAPE TO '%F'; # default
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F'; # default
CONFIGURE DEVICE TYPE 'SBT_TAPE' PARALLELISM 2 BACKUP TYPE TO COMPRESSED BACKUPSET;
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE SBT_TAPE TO 1; # default
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE SBT_TAPE TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE CHANNEL DEVICE TYPE 'SBT_TAPE' PARMS 'ENV=(OB_DEVICE=tape1)';
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default
CONFIGURE RMAN OUTPUT TO KEEP FOR 7 DAYS; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/disk1/oracle/dbs/snapcf_ev.f'; # default

2、show命令查看

1
2
3

show all;查看所有配置
show retention policy;查看保留策略
show default device type;查看默认设备类型

3、恢复修改后的策略为默认策略configure……clear

1
2
3

CONFIGURE backup optimization clear;修改备份优化策略为默认（默认为off）
CONFIGURE RETENTION POLICY CLEAR;修改保留策略默认为保留一天
CONFIGURE CONTROFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK CLEAR;

4、配置默认备份设备类型

CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE DEFAULT DEVICE TYPE TO SBT;指定备份设备为system backup tape
也可以使用backup命令覆盖默认的configure配置参数
BACKUP DEVICE TYPE sbt DATABASE;
BACKUP DEVICE TYPE DISK DATABASE;

5、配置默认的备份类型

copy备份形式只能用于disk备份设备类型
sbt的备份设备类型只用用backup set备份形式
CONFIGURE DEVICE TYPE DISK BACKUP TYPE TO COPY; # image copies不能压缩
CONFIGURE DEVICE TYPE DISK BACKUP TYPE TO BACKUPSET; # uncompressed（默认）
CONFIGURE DEVICE TYPE DISK BACKUP TYPE TO COMPRESSED BACKUPSET;（压缩备份到disk）
CONFIGURE DEVICE TYPE sbt BACKUP TYPE TO COMPRESSED BACKUPSET;（压缩备份到sbt）

6、配置通道

对于tape备份，每盘磁带分配一个通道。对于磁盘备份，每块物理磁盘分配一个通道，除非你可以优化磁盘子系统多通道架构。错误的通道数量会影响在io操作方面rman的性能。
默认情况下并行为1
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO COMPRESSED BACKUPSET;
如果不指定任何channel直接备份，系统会自动分配一个通道，例如ora_disk_1

RMAN> backup as compressed backupset full database format '/tmp/backuporacle/db_%d_%T_%U';
Starting backup at 2019:04:12 21:29:57
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=397 device type=DISK
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00002 name=/data/u01/app/oracle/oradata/boston/sysaux01.dbf
......
input datafile file number=00003 name=/data/u01/app/oracle/oradata/boston/undotbs01.dbf
channel ORA_DISK_1: starting piece 1 at 2019:04:12 21:29:57
channel ORA_DISK_1: finished piece 1 at 2019:04:12 21:31:02
piece handle=/tmp/backuporacle/db_BOSTON_20190412_cstur72l_1_1 tag=TAG20190412T212957 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:01:05
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
including current control file in backup set
including current SPFILE in backup set
channel ORA_DISK_1: starting piece 1 at 2019:04:12 21:31:05
channel ORA_DISK_1: finished piece 1 at 2019:04:12 21:31:06
piece handle=/tmp/backuporacle/db_BOSTON_20190412_cttur74m_1_1 tag=TAG20190412T212957 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 2019:04:12 21:31:06

如果自己指定分配通道，默认的PARALLELISM会被覆盖掉

rman > run{
allocate channel c1 device type disk;
allocate channel c2 device type disk;
backup as compressed backupset full database format '/tmp/backuporacle/db_%d_%T_%U';
release channel c1;
release channel c2;
}

allocated channel: c1
channel c1: SID=10 device type=DISK
allocated channel: c2
channel c2: SID=203 device type=DISK
Starting backup at 2019:04:12 22:26:40
channel c1: starting compressed full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00002 name=/data/u01/app/oracle/oradata/boston/sysaux01.dbf
input datafile file number=00003 name=/data/u01/app/oracle/oradata/boston/undotbs01.dbf
channel c1: starting piece 1 at 2019:04:12 22:26:41
channel c2: starting compressed full datafile backup set
channel c2: specifying datafile(s) in backup set
input datafile file number=00001 name=/data/u01/app/oracle/oradata/boston/system01.dbf
input datafile file number=00004 name=/data/u01/app/oracle/oradata/boston/users01.dbf
input datafile file number=00005 name=/data/u01/app/oracle/oradata/boston/test001.dbf
channel c2: starting piece 1 at 2019:04:12 22:26:41
channel c2: finished piece 1 at 2019:04:12 22:27:06
piece handle=/tmp/backuporacle/db_BOSTON_20190412_d3turad1_1_1 tag=TAG20190412T222640 comment=NONE
channel c2: backup set complete, elapsed time: 00:00:25
channel c2: starting compressed full datafile backup set
channel c2: specifying datafile(s) in backup set
including current control file in backup set
channel c2: starting piece 1 at 2019:04:12 22:27:09
channel c2: finished piece 1 at 2019:04:12 22:27:10
piece handle=/tmp/backuporacle/db_BOSTON_20190412_d4turadq_1_1 tag=TAG20190412T222640 comment=NONE
channel c2: backup set complete, elapsed time: 00:00:01
channel c2: starting compressed full datafile backup set
channel c2: specifying datafile(s) in backup set
including current SPFILE in backup set
channel c2: starting piece 1 at 2019:04:12 22:27:10
channel c2: finished piece 1 at 2019:04:12 22:27:11
piece handle=/tmp/backuporacle/db_BOSTON_20190412_d5turadu_1_1 tag=TAG20190412T222640 comment=NONE
channel c2: backup set complete, elapsed time: 00:00:01
channel c1: finished piece 1 at 2019:04:12 22:27:25
piece handle=/tmp/backuporacle/db_BOSTON_20190412_d2turad1_1_1 tag=TAG20190412T222640 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:44
Finished backup at 2019:04:12 22:27:25
released channel: c1
released channel: c2

分配通道时可以指定多个路径

RMAN> run{
2> allocate channel c1 device type disk format '/tmp/oracle1/db_%d_%T_%U';
3> allocate channel c2 device type disk format '/tmp/oracle2/db_%d_%T_%U';
4> backup as compressed backupset full database;
5> release channel c1;
6> release channel c2;
7> }
allocated channel: c1
channel c1: SID=10 device type=DISK
allocated channel: c2
channel c2: SID=203 device type=DISK
Starting backup at 2019:04:12 22:35:16
channel c1: starting compressed full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00002 name=/data/u01/app/oracle/oradata/boston/sysaux01.dbf
input datafile file number=00003 name=/data/u01/app/oracle/oradata/boston/undotbs01.dbf
channel c1: starting piece 1 at 2019:04:12 22:35:17
channel c2: starting compressed full datafile backup set
channel c2: specifying datafile(s) in backup set
input datafile file number=00001 name=/data/u01/app/oracle/oradata/boston/system01.dbf
input datafile file number=00004 name=/data/u01/app/oracle/oradata/boston/users01.dbf
input datafile file number=00005 name=/data/u01/app/oracle/oradata/boston/test001.dbf
channel c2: starting piece 1 at 2019:04:12 22:35:17
channel c2: finished piece 1 at 2019:04:12 22:35:42
piece handle=/tmp/oracle2/db_BOSTON_20190412_d7turat5_1_1 tag=TAG20190412T223516 comment=NONE
channel c2: backup set complete, elapsed time: 00:00:25
channel c2: starting compressed full datafile backup set
channel c2: specifying datafile(s) in backup set
including current control file in backup set
channel c2: starting piece 1 at 2019:04:12 22:35:45
channel c2: finished piece 1 at 2019:04:12 22:35:46
piece handle=/tmp/oracle2/db_BOSTON_20190412_d8turatu_1_1 tag=TAG20190412T223516 comment=NONE
channel c2: backup set complete, elapsed time: 00:00:01
channel c2: starting compressed full datafile backup set
channel c2: specifying datafile(s) in backup set
including current SPFILE in backup set
channel c2: starting piece 1 at 2019:04:12 22:35:46
channel c2: finished piece 1 at 2019:04:12 22:35:47
piece handle=/tmp/oracle2/db_BOSTON_20190412_d9turau2_1_1 tag=TAG20190412T223516 comment=NONE
channel c2: backup set complete, elapsed time: 00:00:01
channel c1: finished piece 1 at 2019:04:12 22:35:53
piece handle=/tmp/oracle1/db_BOSTON_20190412_d6turat5_1_1 tag=TAG20190412T223516 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:36
Finished backup at 2019:04:12 22:35:53
released channel: c1
released channel: c2

在oracle1和oracle2的路径下存放了备份的所有文件，如果放到不同物理磁盘可以提升备份效率

bash > ls oracle1/ oracle2/
oracle1/:
db_BOSTON_20190412_d6turat5_1_1

oracle2/:
db_BOSTON_20190412_d7turat5_1_1  db_BOSTON_20190412_d8turatu_1_1  db_BOSTON_20190412_d9turau2_1_1

也可以在configure下面配置好多个路径

CONFIGURE DEVICE TYPE DISK PARALLELISM 3;
CONFIGURE DEFAULT DEVICE TYPE TO DISK;
CONFIGURE CHANNEL 1 DEVICE TYPE DISK FORMAT '/tmp/oracle1/%U';
CONFIGURE CHANNEL 2 DEVICE TYPE DISK FORMAT '/tmp/oracle2/%U';
CONFIGURE CHANNEL 3 DEVICE TYPE DISK FORMAT '/tmp/oracle3/%U';
BACKUP AS COPY DATABASE;

RMAN> BACKUP AS COPY DATABASE;
Starting backup at 2019:04:12 22:43:26
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=10 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=203 device type=DISK
allocated channel: ORA_DISK_3
channel ORA_DISK_3: SID=396 device type=DISK
channel ORA_DISK_1: starting datafile copy
input datafile file number=00002 name=/data/u01/app/oracle/oradata/boston/sysaux01.dbf
channel ORA_DISK_2: starting datafile copy
input datafile file number=00001 name=/data/u01/app/oracle/oradata/boston/system01.dbf
channel ORA_DISK_3: starting datafile copy
input datafile file number=00004 name=/data/u01/app/oracle/oradata/boston/users01.dbf
output file name=/tmp/oracle2/data_D-BOSTON_I-2681136947_TS-SYSTEM_FNO-1_dbturbcf tag=TAG20190412T224326 RECID=20 STAMP=1005432219
channel ORA_DISK_2: datafile copy complete, elapsed time: 00:00:15
channel ORA_DISK_2: starting datafile copy
input datafile file number=00005 name=/data/u01/app/oracle/oradata/boston/test001.dbf
output file name=/tmp/oracle3/data_D-BOSTON_I-2681136947_TS-USERS_FNO-4_dcturbcf tag=TAG20190412T224326 RECID=19 STAMP=1005432216
channel ORA_DISK_3: datafile copy complete, elapsed time: 00:00:20
channel ORA_DISK_3: starting datafile copy
input datafile file number=00003 name=/data/u01/app/oracle/oradata/boston/undotbs01.dbf
output file name=/tmp/oracle1/data_D-BOSTON_I-2681136947_TS-SYSAUX_FNO-2_daturbce tag=TAG20190412T224326 RECID=21 STAMP=1005432227
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:21
channel ORA_DISK_1: starting datafile copy
copying current control file
output file name=/tmp/oracle2/data_D-BOSTON_I-2681136947_TS-TEST_FNO-5_ddturbd3 tag=TAG20190412T224326 RECID=22 STAMP=1005432229
channel ORA_DISK_2: datafile copy complete, elapsed time: 00:00:04
channel ORA_DISK_2: starting full datafile backup set
channel ORA_DISK_2: specifying datafile(s) in backup set
including current SPFILE in backup set
channel ORA_DISK_2: starting piece 1 at 2019:04:12 22:43:51
output file name=/tmp/oracle3/data_D-BOSTON_I-2681136947_TS-UNDOTBS1_FNO-3_deturbd3 tag=TAG20190412T224326 RECID=23 STAMP=1005432230
channel ORA_DISK_3: datafile copy complete, elapsed time: 00:00:04
output file name=/tmp/oracle1/cf_D-BOSTON_id-2681136947_dfturbd4 tag=TAG20190412T224326 RECID=24 STAMP=1005432231
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:04
channel ORA_DISK_2: finished piece 1 at 2019:04:12 22:43:52
piece handle=/tmp/oracle2/dgturbd7_1_1 tag=TAG20190412T224326 comment=NONE
channel ORA_DISK_2: backup set complete, elapsed time: 00:00:01
Finished backup at 2019:04:12 22:43:52

在oracle1、oracle2、oracle3路径下存储这备份的所有文件：

[oracle@dax-mysql-slave tmp]$ ls oracle1/ oracle2/ oracle3/
oracle1/:
cf_D-BOSTON_id-2681136947_dfturbd4  data_D-BOSTON_I-2681136947_TS-SYSAUX_FNO-2_daturbce

oracle2/:
data_D-BOSTON_I-2681136947_TS-SYSTEM_FNO-1_dbturbcf  data_D-BOSTON_I-2681136947_TS-TEST_FNO-5_ddturbd3  dgturbd7_1_1

oracle3/:
data_D-BOSTON_I-2681136947_TS-UNDOTBS1_FNO-3_deturbd3  data_D-BOSTON_I-2681136947_TS-USERS_FNO-4_dcturbcf

恢复配置至默认
CONFIGURE CHANNEL DEVICE TYPE DISK clear;

7、控制文件自动备份

CONFIGURE CONTROLFILE AUTOBACKUP ON;（开启自动备份，默认为off）
CONFIGURE CONTROLFILE AUTOBACKUP OFF;
指定备份的路径
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/tmp/oracle/cf_%F';
备份数据时，会自动备份控制文件和数据库参数文件

RMAN> BACKUP AS COPY DATABASE;
......
Starting Control File and SPFILE Autobackup at 2019:04:12 23:58:10
piece handle=/tmp/oracle/cf_c-2681136947-20190412-00 comment=NONE
Finished Control File and SPFILE Autobackup at 2019:04:12 23:58:17

清空自动备份控制文件参数
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK CLEAR;
在run下面使用set controlfile autobackup format命令，可以覆盖掉configure下面的配置信息

RMAN> RUN
2> {
3>   SET CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/tmp/oracle/cf_%F.bck';
4>   BACKUP AS BACKUPSET DEVICE TYPE DISK DATABASE;
5> }
executing command: SET CONTROLFILE AUTOBACKUP FORMAT
......
Starting Control File and SPFILE Autobackup at 2019:04:13 00:07:28
piece handle=/tmp/oracle/cf_c-2681136947-20190413-00.bck comment=NONE
Finished Control File and SPFILE Autobackup at 2019:04:13 00:07:31

8、配置备份保留策略

配置基于冗余的保留策略（冗余3份）
CONFIGURE RETENTION POLICY TO REDUNDANCY 3;
配置基于时间窗口的保留策略（保留7天）
CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS;
禁用保留策略
CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS;

9、备份优化

CONFIGURE BACKUP OPTIMIZATION ON;(启动备份优化策略，默认为off)
开启备份优化策略，rman根据备份策略和备份双工特性在算法中的因素，来判断是否有足够的备份在rman指定的备份设备上，以此来决定是否对同一文件是否备份。

备份时想要覆盖优化策略可以使用FORCE选项：

1 2	BACKUP DATABASE FORCE; BACKUP ARCHIVELOG ALL FORCE;

10、配置归档之日删除策略

备份两次的归档日志可以被删除:
CONFIGURE ARCHIVELOG DELETION POLICY TO BACKED UP 2 TIMES TO DISK;
该删除策略的意义是：每份归档日志只会备份两次，哪怕执行多次备份，已经满足2次备份的归档也不会备份。执行备份的时候不会自动删除已经满足删除策略的归档，需要使用delete archivelog all才行。且不满足两次的备份时不会被删除的。

20:07:02 SYS@ boston> select recid, sequence#, archived, deleted, backup_count from v$archived_log where deleted='NO';

     RECID  SEQUENCE# ARC DEL BACKUP_COUNT
---------- ---------- --- --- ------------
       294        491 YES NO             2
       295        492 YES NO             2
       296        493 YES NO             2
       297        494 YES NO             2
       298        495 YES NO             2
       299        496 YES NO             1
       300        497 YES NO             1

执行删除策略

RMAN> delete archivelog all;
......
RMAN-08138: WARNING: archived log not deleted - must create more backups
archived log file name=/data/u01/app/oracle/fast_recovery_area/BOSTON/archivelog/2019_04_13/o1_mf_1_496_gc3n6kxk_.arc thread=1 sequence=496
RMAN-08138: WARNING: archived log not deleted - must create more backups
archived log file name=/data/u01/app/oracle/fast_recovery_area/BOSTON/archivelog/2019_04_13/o1_mf_1_497_gc3n7sfh_.arc thread=1 sequence=497
List of Archived Log Copies for database with db_unique_name BOSTON
=====================================================================

Key     Thrd Seq     S Low Time
------- ---- ------- - -------------------
294     1    491     A 2019:04:13 19:26:37
        Name: /data/u01/app/oracle/fast_recovery_area/BOSTON/archivelog/2019_04_13/o1_mf_1_491_gc3lq5ss_.arc

295     1    492     A 2019:04:13 19:41:25
        Name: /data/u01/app/oracle/fast_recovery_area/BOSTON/archivelog/2019_04_13/o1_mf_1_492_gc3lq7m5_.arc

296     1    493     A 2019:04:13 19:41:27
        Name: /data/u01/app/oracle/fast_recovery_area/BOSTON/archivelog/2019_04_13/o1_mf_1_493_gc3lrkc7_.arc

297     1    494     A 2019:04:13 19:42:08
        Name: /data/u01/app/oracle/fast_recovery_area/BOSTON/archivelog/2019_04_13/o1_mf_1_494_gc3ltyl3_.arc

298     1    495     A 2019:04:13 19:43:26
        Name: /data/u01/app/oracle/fast_recovery_area/BOSTON/archivelog/2019_04_13/o1_mf_1_495_gc3lwk6g_.arc
......
Deleted 5 objects

根据提示备份满足两次的可以删除，299和300需要更多的备份才能被删除。
删除完之后，查看没有被删除的归档：

20:07:36 SYS@ boston> select recid, sequence#, archived, deleted, backup_count from v$archived_log where deleted='NO';

     RECID  SEQUENCE# ARC DEL BACKUP_COUNT
---------- ---------- --- --- ------------
       299        496 YES NO             1
       300        497 YES NO             1

执行一次归档日志备份：

RMAN> backup archivelog all format '/tmp/backuporacle/arch_%d_%T_%s_%p.bak';
查看归档日志信息：

20:08:05 SYS@ boston> select recid, sequence#, archived, deleted, backup_count from v$archived_log where deleted='NO';

     RECID  SEQUENCE# ARC DEL BACKUP_COUNT
---------- ---------- --- --- ------------
       299        496 YES NO             2
       300        497 YES NO             2
       301        498 YES NO             1

再次执行一次备份
RMAN> backup archivelog all format '/tmp/backuporacle/arch_%d_%T_%s_%p.bak';
查看归档日志信息：

20:10:38 SYS@ boston> select recid, sequence#, archived, deleted, backup_count from v$archived_log where deleted='NO';

     RECID  SEQUENCE# ARC DEL BACKUP_COUNT
---------- ---------- --- --- ------------
       299        496 YES NO             2
       300        497 YES NO             2
       301        498 YES NO             2
       302        499 YES NO             1

发现299、300只备份了两次，没有被多次备份。
再次删除归档

RMAN> delete archivelog all;
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=580 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=11 device type=DISK
allocated channel: ORA_DISK_3
channel ORA_DISK_3: SID=199 device type=DISK
RMAN-08138: WARNING: archived log not deleted - must create more backups
archived log file name=/data/u01/app/oracle/fast_recovery_area/BOSTON/archivelog/2019_04_13/o1_mf_1_499_gc3nfwjg_.arc thread=1 sequence=499
List of Archived Log Copies for database with db_unique_name BOSTON
=====================================================================

Key     Thrd Seq     S Low Time
------- ---- ------- - -------------------
299     1    496     A 2019:04:13 19:44:16
        Name: /data/u01/app/oracle/fast_recovery_area/BOSTON/archivelog/2019_04_13/o1_mf_1_496_gc3n6kxk_.arc

300     1    497     A 2019:04:13 20:06:41
        Name: /data/u01/app/oracle/fast_recovery_area/BOSTON/archivelog/2019_04_13/o1_mf_1_497_gc3n7sfh_.arc

301     1    498     A 2019:04:13 20:07:20
        Name: /data/u01/app/oracle/fast_recovery_area/BOSTON/archivelog/2019_04_13/o1_mf_1_498_gc3nfgb6_.arc


Do you really want to delete the above objects (enter YES or NO)? yes
deleted archived log
archived log file name=/data/u01/app/oracle/fast_recovery_area/BOSTON/archivelog/2019_04_13/o1_mf_1_496_gc3n6kxk_.arc RECID=299 STAMP=1005509202
deleted archived log
archived log file name=/data/u01/app/oracle/fast_recovery_area/BOSTON/archivelog/2019_04_13/o1_mf_1_497_gc3n7sfh_.arc RECID=300 STAMP=1005509241
deleted archived log
archived log file name=/data/u01/app/oracle/fast_recovery_area/BOSTON/archivelog/2019_04_13/o1_mf_1_498_gc3nfgb6_.arc RECID=301 STAMP=1005509422
Deleted 3 objects

备份超过两次的归档被删除，如果想要强制删除，不使用删除策略，使用delete force archivelog all;

RMAN> delete force archivelog all;
List of Archived Log Copies for database with db_unique_name BOSTON
=====================================================================

Key     Thrd Seq     S Low Time
------- ---- ------- - -------------------
302     1    499     A 2019:04:13 20:10:21
        Name: /data/u01/app/oracle/fast_recovery_area/BOSTON/archivelog/2019_04_13/o1_mf_1_499_gc3nfwjg_.arc


Do you really want to delete the above objects (enter YES or NO)? yes
deleted archived log
archived log file name=/data/u01/app/oracle/fast_recovery_area/BOSTON/archivelog/2019_04_13/o1_mf_1_499_gc3nfwjg_.arc RECID=302 STAMP=1005509436
Deleted 1 objects

[Oracle] rman configure基础参数配置