近期的rman备份中，归档日志的备份没有被删除，rman的脚本和策略都没变过，归档的备份一直保留，每过一段时间就要物理删除备份，很是奇怪。
rman的configure如下
RMAN> show all;
RMAN configuration parameters for database with db_unique_name HUBSRAC are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 2;
CONFIGURE BACKUP OPTIMIZATION ON;
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 BACKUP TYPE TO COMPRESSED BACKUPSET PARALLELISM 1;
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE COMPRESSION ALGORITHM 'MEDIUM' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE;
CONFIGURE ARCHIVELOG DELETION POLICY TO BACKED UP 20 TIMES TO DISK;
CONFIGURE SNAPSHOT CONTROLFILE NAME TO '+dg_redo/hubsrac/snapcf_hubsrac.f';
RMAN> corsscheck backup;
RMAN> report obsolete;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
Report of obsolete backups and copies
Type Key Completion Time Filename/Handle
-------------------- ------ ------------------ --------------------
Control File Copy 44 2016/05/31 14:14:26 +DG_REDO01/orclrac/control_snapshot/snapcf_orclrac1.f
发现obsolete的列表里，只有一个controlfile的copy,而且是三个月前的？推算一下，应该是这个库之前做standby的时候遗留下来的，尝试删除这个过期的备份
RMAN> delete obsolete;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
using channel ORA_DISK_1
Deleting the following obsolete backups and copies:
Type Key Completion Time Filename/Handle
-------------------- ------ ------------------ --------------------
Control File Copy 44 2016/05/31 14:14:26 +DG_REDO01/orclrac/control_snapshot/snapcf_orclrac1.f
Do you really want to delete the above objects (enter YES or NO)? YES
deleted control file copy
control file copy file name=+DG_REDO01/orclrac/control_snapshot/snapcf_orclrac1.f RECID=44 STAMP=913299266
Deleted 1 objects
注意已经提示Deleted 1 objects，但是在此report时会发现，这个记录仍然存在
RMAN> report obsolete;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
Report of obsolete backups and copies
Type Key Completion Time Filename/Handle
-------------------- ------ ------------------ --------------------
Control File Copy 44 2016/05/31 14:14:26 +DG_REDO01/orclrac/control_snapshot/snapcf_orclrac1.f
换一种方法删除
RMAN> CROSSCHECK CONTROLFILECOPY '+DG_REDO01/orclrac/control_snapshot/snapcf_orclrac1.f';
released channel: ORA_DISK_1
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=2064 instance=orclrac2 device type=DISK
validation failed for control file copy
control file copy file name=+DG_REDO01/orclrac/control_snapshot/snapcf_orclrac1.f RECID=44 STAMP=913299266
Crosschecked 1 objects
RMAN> delete obsolete;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
using channel ORA_DISK_1
Deleting the following obsolete backups and copies:
Type Key Completion Time Filename/Handle
-------------------- ------ ------------------ --------------------
Control File Copy 44 2016/05/31 14:14:26 +DG_REDO01/orclrac/control_snapshot/snapcf_orclrac1.f
Do you really want to delete the above objects (enter YES or NO)? YES
deleted control file copy
control file copy file name=+DG_REDO01/orclrac/control_snapshot/snapcf_orclrac1.f RECID=44 STAMP=913299266
Deleted 1 objects
仍让存在。。。
RMAN> report obsolete;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
Report of obsolete backups and copies
Type Key Completion Time Filename/Handle
-------------------- ------ ------------------ --------------------
Control File Copy 44 2016/05/31 14:14:26 +DG_REDO01/orclrac/control_snapshot/snapcf_orclrac1.f
再换一种方法
RMAN> DELETE FORCE NOPROMPT OBSOLETE DEVICE TYPE DISK;
If RMAN-06214 still occurs, then try
RMAN> CROSSCHECK COPY OF CONTROLFILE;
还是存在
RMAN> report obsolete;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 2
Report of obsolete backups and copies
Type Key Completion Time Filename/Handle
-------------------- ------ ------------------ --------------------
Control File Copy 44 2016/05/31 14:14:26 +DG_REDO01/orclrac/control_snapshot/snapcf_orclrac1.f
没办法了，uncatalog之后就没有了，官方上给出的方法：
RMAN> change controlfilecopy '+DG_REDO01/orclrac/control_snapshot/snapcf_orclrac1.f' uncatalog;
uncataloged control file copy
control file copy file name=+DG_REDO01/orclrac/control_snapshot/snapcf_orclrac1.f RECID=44 STAMP=913299266
Uncataloged 1 objects
过期的控制文件备份是干掉了，可是再次去检查obsolete，发现那些老的归档日志备份仍然不是obsolete~
查看一下capture，发现有ogg的capture注册在数据库
SQL> col required_checkpoint_scn for 9999999999999999999
SQL> select capture_name, required_checkpoint_scn from dba_capture;
CAPTURE_NAME REQUIRED_CHECKPOINT_SCN
------------------------------ -----------------------
OGG$CAP_FM1 46264409580
OGG$CAP_ET1 46264410538