客户的Oracle 11gR2 Active Data Guard环境，主数据库的standby_file_management=AUTO，备用数据库的standby_file_management=MANUAL，导致在主数据库为表空间添加的数据文件操作没有同步到备用数据库，在$ORACLE_HOME/dbs目录下也没有创建类似UNNAMED00003的文件，备用数据库有如下的告警日志：
Tue Sep 02 17:37:36 2014
File #3 added to control file as 'UNNAMED00003' because
the parameter STANDBY_FILE_MANAGEMENT is set to MANUAL
The file should be manually created to continue.
MRP0: Background Media Recovery terminated with error 1274
Errors in file /u01/app/oracle/diag/rdbms/d012dg/d012band/trace/d012band_pr00_5702078.trc:
ORA-01274: cannot add datafile '/oradata1/d012band/tsmisc06.dbf' - file could not be created
Managed Standby Recovery not using Real Time Apply
Recovery interrupted!
Recovered data files to a consistent state at change 866102511
Tue Sep 02 17:37:46 2014
MRP0: Background Media Recovery process shutdown (d012band)
Tue Sep 02 17:52:14 2014
RFS[1]: Selected log 8 for thread 1 sequence 19136 dbid 2134147111 branch 809469738
Tue Sep 02 17:52:25 2014
Archived Log entry 511 added for thread 1 sequence 19135 ID 0x7f340827 dest 1:
Tue Sep 02 17:53:23 2014
alter database recover managed standby database using current logfile disconnect from session
Attempt to start background Managed Standby Recovery process (d012band)
Tue Sep 02 17:53:23 2014
MRP0 started with pid=42, OS id=7471452
MRP0: Background Managed Standby Recovery process started (d012band)
started logmerger process
Tue Sep 02 17:53:29 2014
Managed Standby Recovery starting Real Time Apply
Tue Sep 02 17:53:30 2014
Errors in file /u01/app/oracle/diag/rdbms/d012dg/d012band/trace/d012band_dbw0_4784178.trc:
ORA-01186: file 3 failed verification tests
ORA-01157: cannot identify/lock data file 3 - see DBWR trace file
ORA-01111: name for data file 3 is unknown - rename to correct file
ORA-01110: data file 3: '/u01/app/oracle/product/11.2.0/db_1/dbs/UNNAMED00003'
如果能够找到/u01/app/oracle/product/11.2.0/db_1/dbs/UNNAMED00003文件，可以参考文章：《11gR2 Active Data Guard调整案例[1]》
File 3 not verified due to error ORA-01157
MRP0: Background Media Recovery terminated with error 1111
Errors in file /u01/app/oracle/diag/rdbms/d012dg/d012band/trace/d012band_pr00_8716760.trc:
ORA-01111: name for data file 3 is unknown - rename to correct file
ORA-01110: data file 3: '/u01/app/oracle/product/11.2.0/db_1/dbs/UNNAMED00003'
ORA-01157: cannot identify/lock data file 3 - see DBWR trace file
ORA-01111: name for data file 3 is unknown - rename to correct file
ORA-01110: data file 3: '/u01/app/oracle/product/11.2.0/db_1/dbs/UNNAMED00003'
Managed Standby Recovery not using Real Time Apply
Slave exiting with ORA-1111 exception
Errors in file /u01/app/oracle/diag/rdbms/d012dg/d012band/trace/d012band_pr00_8716760.trc:
ORA-01111: name for data file 3 is unknown - rename to correct file
ORA-01110: data file 3: '/u01/app/oracle/product/11.2.0/db_1/dbs/UNNAMED00003'
ORA-01157: cannot identify/lock data file 3 - see DBWR trace file
ORA-01111: name for data file 3 is unknown - rename to correct file
ORA-01110: data file 3: '/u01/app/oracle/product/11.2.0/db_1/dbs/UNNAMED00003'
Recovery Slave PR00 previously exited with exception 1111
MRP0: Background Media Recovery process shutdown (d012band)
Completed: alter database recover managed standby database using current logfile disconnect from session
解决这个问题的关键是手动创建新添加的数据文件，参考如下的内容解决该问题：
How to resolve MRP stuck issues on a physical standby database? (文档 ID 1221163.1)
......
Solution 10 Add the new datafiles to the standby database manually.
1) Please take a hot backup of new datafiles from the primary database.
2) Create a new standby controlfile from the primary database by
SQL>alter database create standby controlfile as '/tmp/controlf.ctl';
If datafiles are on ASM, please follow the note below and you could ignore the rest of steps:
Note 734862.1 Step By Step Guide On How To Recreate Standby Control File
When Datafiles Are On ASM And Using Oracle Managed Files
Or you could modify the wrong datafile name in the standby controlfile by alter database rename command. For example,
SQL> ALTER DATABASE RENAME FILE '<path/UNNAMED00003>' to '<path/real datafile name>';
3) If the new datafile location on the primary is different from the standby, please make sure
db_file_name_convert init parameter is set on the standby database.
Note 47325.1 Init.ora Parameter "DB_FILE_NAME_CONVERT" Reference Note
If db_file_name_convert init parameter has already been set, then you could ignore this step.
4) Cancel the managed recovery
SQL>alter database recover managed standby database cancel;
5) set standby_file_management=manual on the standby database and shutdown the standby database.
SQL>alter system set standby_file_management=manual sid='*';
SQL>shutdown immediate;