Non-critical data files are missing (can be lost offline data files):
run{
SQL ' ALTER DATABASE datafile <> offline ';
Restore DataFile <>;
Recover DataFile <>;
SLQ ' ALTER DATABASE datafile <> online ';
}
In addition to the system, the Undo_tablespace parameter after the value of the table space can be recovered using the above method.
[Email protected] ~]$ ls/u01/oracle/oradata/jadl10g/
Control01.ctl control03.ctl redo01.log redo03.log system01.dbf undotbs01.dbf
Control02.ctl example01.dbf redo02.log sysaux01.dbf temp01.dbf users01.dbf
[Email protected] ~]$ RM/U01/ORACLE/ORADATA/JADL10G/EXAMPLE01.DBF
[Email protected] ~]$ Sqlplus/as SYSDBA
Sql*plus:release 10.2.0.5.0-production on Thu Nov 6 15:23:57 2014
Copyright (c) 1982, Oracle. All rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.5.0-64bit Production
With the partitioning, Oracle Label Security, OLAP, Data Mining scoring Engine
and Real Application Testing options
Sql> select * from Hr.employees;
SELECT * FROM Hr.employees
*
ERROR at line 1:
Ora-01116:error in opening database file 5
Ora-01110:data file 5: '/U01/ORACLE/ORADATA/JADL10G/EXAMPLE01.DBF '
Ora-27041:unable to open File
linux-x86_64 error:2: No such file or directory
Additional Information:3
[Email protected] ~]$ Vi/tmp/1.rman
To create a recovery script:
[Email protected] ~]$ Cat/tmp/1.rman
run{
SQL ' ALTER DATABASE datafile 5 offline ';
Restore DataFile 5;
Recover DataFile 5;
SQL ' ALTER DATABASE datafile 5 online ';
}
Rman uses the established script to recover data from the database:
[Email protected] ~]$ Rman Target/cmdfile=/tmp/1.rman
Recovery manager:release 10.2.0.5.0-production on Thu Nov 6 15:29:28 2014
Copyright (c) 1982, Oracle. All rights reserved.
Connected to target database:jadl10g (dbid=2011530396)
Rman> run{
2> SQL ' ALTER DATABASE datafile 5 offline ';
3> restore DataFile 5;
4> recover datafile 5;
5> SQL ' ALTER DATABASE datafile 5 online ';
6>}
7>
Using target database control file instead of recovery catalog
SQL Statement:alter database datafile 5 offline
Starting restore at 06-nov-14
Allocated Channel:ora_disk_1
Channel ora_disk_1:sid=159 Devtype=disk
Channel ora_disk_1:starting datafile backupset restore
Channel ora_disk_1:specifying DataFile (s) to the restore from backup set
restoring DataFile 00005 to/u01/oracle/oradata/jadl10g/example01.dbf
Channel ora_disk_1:reading from backup piece/u01/oracle/flash_recovery_area/jadl10g/backupset/2014_11_06/o1_mf_ Nnndf_tag20141106t135107_b5p32dhf_.bkp
Channel ora_disk_1:restored backup Piece 1
Piece handle=/u01/oracle/flash_recovery_area/jadl10g/backupset/2014_11_06/o1_mf_nnndf_tag20141106t135107_ B5P32DHF_.BKP tag=tag20141106t135107
Channel Ora_disk_1:restore complete, elapsed time:00:00:07
Finished restore at 06-nov-14
Starting recover at 06-nov-14
Using channel Ora_disk_1
Starting Media recovery
Media recovery complete, elapsed time:00:00:00
Finished recover at 06-nov-14
SQL Statement:alter database datafile 5 Online
Recovery Manager complete.
There is no error executing the query at this time.
System/example are missing what to do with it?
SHUTDOWM Abort
Restore DataFile 1, 5;
Recover database;
ALTER DATABASE open;
After doing so, you do not need to back up the database, and the previous backup is valid.
Recovering a copy of an image
rman> Backup as copy datafile 5;
Starting backup at 06-nov-14
Using target database control file instead of recovery catalog
Allocated Channel:ora_disk_1
Channel ora_disk_1:sid=159 Devtype=disk
Channel ora_disk_1:starting datafile Copy
Input datafile fno=00005 name=/u01/oracle/oradata/jadl10g/example01.dbf
Output FILENAME=/U01/ORACLE/FLASH_RECOVERY_AREA/JADL10G/DATAFILE/O1_MF_EXAMPLE_B5PBO2PC_.DBF tag= tag20141106t160034 recid=10 stamp=862934437
Channel ora_disk_1:datafile copy complete, elapsed time:00:00:03
Finished backup at 06-nov-14
rman> Recover copy of datafile 5; ---Change the command is to make incremental changes to the above data file,
Starting recover at 06-nov-14
Using channel Ora_disk_1
No copy of DataFile 5 found to recover
Finished recover at 06-nov-14
Migrating data files from one path to a new path
Data files from file system to ASM
Data files from ASM to file system
Implementation of the above requirements:
Set newname for datafile ' ... ' to ' ... ';
Restore ...
Switch datafile all;
Recover ....
To migrate a data file to ASM:
Sql> select name from V$asm_diskgroup;
VI A.rman
run{
SQL ' alter tablespace A1 offline immediate ';
Set newname for datafile 7 to ' +db ';
Restore DataFile 7;
Switch datafile all; ---swap files
Recover DataFile 7;
SLQ ' alter tablespace A1 online ';
}
Execute the script in Rman;
12c is quite special:
ALTER DATABASE datafile move '/u01/... ';----moved to a new path
"Noncritical Data file loss (can be lost offline data file)-recovery-1"
