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28/11/2015 11g Release 2 Tablespace Point In Time Recovery – recover from dropped tablespace « Oracle DBA Tips and Techniques
http://gavinsoorma.com/2009/11/11grelease2tablespacepointintimerecoveryrecoverfromdroppedtablespace/ 1/7
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11g Release 2 Tablespace Point In Time Recovery – recover from dropped tablespace
One of the good new features in 11g Release 2 is that it enables us to recover from a case of a droppedtablespace. TSPITR (tablespace point in time recovery) has been around in earlier releases, but we could notrecover a dropped tablespace.
What 11gR2 does is that it peforms a fully automated RMAN managed TSPITR. It creates and starts the auxiliaryinstance and restores just the datafiles it requires – SYSTEM,SYSAUX,UNDO and the files pertaining to thedropped tablespace – in this case datafiles 1,2,3 and 7 in the location which we specify as the ‘AuxiliaryDestination’. It will first perform a recovery of the tablespace on the auxiliary instance and then use Data Pumpand Transportable Tablespace technology to extract and import the tablespace meta data into the original sourcedatabase.
To illustrate this example we create a new tablespace MYEXAMPLE and create two tables MYSALES andMYCOSTS in this tablespace. We take a database backup and then drop the tablespace and then performtablespace point in time recovery using RMAN.
Before dropping the tablespace we first note the SCN as we will use this SCN when we do the TSPITR. Note alsothat we are connected to a RMAN catalog as well although the documentation does state that we can performTSPITR without a recovery catalog.
SQL> create tablespace myexample datafile '+DATA' size 200m;
Tablespace created.
SQL> create table mysales 2 tablespace myexample 3 as select * from sales;
Table created.
SQL> create table mycosts 2 tablespace myexample 3 as select * from costs;
Table created.
SQL> conn / as sysdbaConnected.SQL> alter system switch logfile;
System altered.
SQL> select current_scn from v$database;
CURRENT_SCN 1043322
SQL> drop tablespace myexample including contents and datafiles;
Tablespace dropped.
RMAN> run 2> set newname for datafile 7 to '+DATA';3> recover tablespace myexample
28/11/2015 11g Release 2 Tablespace Point In Time Recovery – recover from dropped tablespace « Oracle DBA Tips and Techniques
http://gavinsoorma.com/2009/11/11grelease2tablespacepointintimerecoveryrecoverfromdroppedtablespace/ 2/7
3> recover tablespace myexample4> until scn 10433225> auxiliary destination '+DATA';6>
executing command: SET NEWNAME
Starting recover at 27NOV09allocated channel: ORA_DISK_1channel ORA_DISK_1: SID=137 device type=DISK
Creating automatic instance, with SID='qyBo'
initialization parameters used for automatic instance:db_name=TESTDBdb_unique_name=qyBo_tspitr_TESTDBcompatible=11.2.0.0.0db_block_size=8192db_files=200sga_target=280Mprocesses=50db_create_file_dest=+DATAlog_archive_dest_1='location=+DATA'#No auxiliary parameter file used
starting up automatic instance TESTDB
Oracle instance started
Total System Global Area 292278272 bytes
Fixed Size 2212736 bytesVariable Size 100666496 bytesDatabase Buffers 184549376 bytesRedo Buffers 4849664 bytesAutomatic instance created
contents of Memory Script:# set requested point in timeset until scn 1043322;# restore the controlfilerestore clone controlfile;# mount the controlfilesql clone 'alter database mount clone database';# archive current online logsql 'alter system archive log current';# avoid unnecessary autobackups for structural changes during TSPITRsql 'begin dbms_backup_restore.AutoBackupFlag(FALSE); end;';# resync catalogresync catalog;executing Memory Script
executing command: SET until clause
Starting restore at 27NOV09allocated channel: ORA_AUX_DISK_1
28/11/2015 11g Release 2 Tablespace Point In Time Recovery – recover from dropped tablespace « Oracle DBA Tips and Techniques
http://gavinsoorma.com/2009/11/11grelease2tablespacepointintimerecoveryrecoverfromdroppedtablespace/ 3/7
allocated channel: ORA_AUX_DISK_1channel ORA_AUX_DISK_1: SID=81 device type=DISK
channel ORA_AUX_DISK_1: starting datafile backup set restorechannel ORA_AUX_DISK_1: restoring control filechannel ORA_AUX_DISK_1: reading from backup piece +DATA/testdb/backupset/2009_11_27/ncsnf0_tag20091127t104307_0.502.704025815channel ORA_AUX_DISK_1: piece handle=+DATA/testdb/backupset/2009_11_27/ncsnf0_tag20091127t104307_0.502.704025815 tag=TAG20091127T104307channel ORA_AUX_DISK_1: restored backup piece 1channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:04output file name=+DATA/testdb/controlfile/current.506.704033345Finished restore at 27NOV09
sql statement: alter database mount clone database
sql statement: alter system archive log current
sql statement: begin dbms_backup_restore.AutoBackupFlag(FALSE); end;
starting full resync of recovery catalogfull resync complete
contents of Memory Script:# set requested point in timeset until scn 1043322;# set destinations for recovery set and auxiliary set datafilesset newname for clone datafile 1 to new;set newname for clone datafile 3 to new;set newname for clone datafile 2 to new;set newname for clone tempfile 1 to new;set newname for datafile 7 to "+DATA";# switch all tempfilesswitch clone tempfile all;# restore the tablespaces in the recovery set and the auxiliary setrestore clone datafile 1, 3, 2, 7;switch clone datafile all;executing Memory Script
executing command: SET until clause
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
renamed tempfile 1 to +DATA in control file
Starting restore at 27NOV09using channel ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: starting datafile backup set restore
28/11/2015 11g Release 2 Tablespace Point In Time Recovery – recover from dropped tablespace « Oracle DBA Tips and Techniques
http://gavinsoorma.com/2009/11/11grelease2tablespacepointintimerecoveryrecoverfromdroppedtablespace/ 4/7
channel ORA_AUX_DISK_1: starting datafile backup set restorechannel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup setchannel ORA_AUX_DISK_1: restoring datafile 00001 to +DATAchannel ORA_AUX_DISK_1: restoring datafile 00003 to +DATAchannel ORA_AUX_DISK_1: restoring datafile 00002 to +DATAchannel ORA_AUX_DISK_1: restoring datafile 00007 to +DATAchannel ORA_AUX_DISK_1: reading from backup piece +DATA/testdb/backupset/2009_11_27/nnndf0_tag20091127t104307 .....channel ORA_AUX_DISK_1: piece handle=+DATA/testdb/backupset/2009_11_27/nnndf0_tag20091127t104307_0.501.704025789 tag=TAG200 .........channel ORA_AUX_DISK_1: restored backup piece 1channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:26Finished restore at 27NOV09
datafile 7 switched to datafile copyinput datafile copy RECID=6 STAMP=704033380 file name=+DATA/testdb/datafile/myexample.512.704033355datafile 1 switched to datafile copyinput datafile copy RECID=7 STAMP=704033380 file name=+DATA/testdb/datafile/system.511.704033355datafile 3 switched to datafile copyinput datafile copy RECID=8 STAMP=704033380 file name=+DATA/testdb/datafile/undotbs1.513.704033355datafile 2 switched to datafile copyinput datafile copy RECID=9 STAMP=704033380 file name=+DATA/testdb/datafile/sysaux.509.704033355
contents of Memory Script:# set requested point in timeset until scn 1043322;# online the datafiles restored or switchedsql clone "alter database datafile 1 online";sql clone "alter database datafile 3 online";sql clone "alter database datafile 2 online";sql clone "alter database datafile 7 online";# recover and open resetlogsrecover clone database tablespace "MYEXAMPLE", "SYSTEM", "UNDOTBS1", "SYSAUX" delete archivelog;alter clone database open resetlogs;executing Memory Script
executing command: SET until clause
sql statement: alter database datafile 1 online
sql statement: alter database datafile 3 online
sql statement: alter database datafile 2 online
sql statement: alter database datafile 7 online
Starting recover at 27NOV09using channel ORA_AUX_DISK_1
starting media recovery
archived log for thread 1 with sequence 10 is already on disk as file +DATA/testdb/archivelog/2009_11_27/.....archived log for thread 1 with sequence 11 is already on disk as file +DATA/testdb/archivelog/2009_11_27/.....archived log for thread 1 with sequence 12 is already on disk as file +DATA/testdb/archivelog/2009_11_27/ ......
28/11/2015 11g Release 2 Tablespace Point In Time Recovery – recover from dropped tablespace « Oracle DBA Tips and Techniques
http://gavinsoorma.com/2009/11/11grelease2tablespacepointintimerecoveryrecoverfromdroppedtablespace/ 5/7
archived log for thread 1 with sequence 12 is already on disk as file +DATA/testdb/archivelog/2009_11_27/ ......archived log file name=+DATA/testdb/archivelog/2009_11_27/ ....archived log file name=+DATA/testdb/archivelog/2009_11_27/....archived log file name=+DATA/testdb/archivelog/2009_11_27/....media recovery complete, elapsed time: 00:00:01Finished recover at 27NOV09
database opened
contents of Memory Script:# make read only the tablespace that will be exportedsql clone 'alter tablespace MYEXAMPLE read only';# create directory for datapump importsql "create or replace directory TSPITR_DIROBJ_DPDIR as ''+DATA''";# create directory for datapump exportsql clone "create or replace directory TSPITR_DIROBJ_DPDIR as ''+DATA''";executing Memory Script
sql statement: alter tablespace MYEXAMPLE read only
sql statement: create or replace directory TSPITR_DIROBJ_DPDIR as ''+DATA''
sql statement: create or replace directory TSPITR_DIROBJ_DPDIR as ''+DATA''
Performing export of metadata...
EXPDP> Starting "SYS"."TSPITR_EXP_qyBo": EXPDP> Processing object type TRANSPORTABLE_EXPORT/PLUGTS_BLK EXPDP> Processing object type TRANSPORTABLE_EXPORT/TABLE EXPDP> Processing object type TRANSPORTABLE_EXPORT/POST_INSTANCE/PLUGTS_BLK EXPDP> Master table "SYS"."TSPITR_EXP_qyBo" successfully loaded/unloaded EXPDP> ****************************************************************************** EXPDP> Dump file set for SYS.TSPITR_EXP_qyBo is: EXPDP> +DATA/tspitr_qybo_53647.dmp EXPDP> ****************************************************************************** EXPDP> Datafiles required for transportable tablespace MYEXAMPLE: EXPDP> +DATA/testdb/datafile/myexample.512.704033355 EXPDP> Job "SYS"."TSPITR_EXP_qyBo" successfully completed at 12:51:34Export completed
contents of Memory Script:
# shutdown clone before importshutdown clone immediateexecuting Memory Script
database closeddatabase dismountedOracle instance shut down
Performing import of metadata... IMPDP> Master table "SYS"."TSPITR_IMP_qyBo" successfully loaded/unloaded IMPDP> Starting "SYS"."TSPITR_IMP_qyBo":
28/11/2015 11g Release 2 Tablespace Point In Time Recovery – recover from dropped tablespace « Oracle DBA Tips and Techniques
http://gavinsoorma.com/2009/11/11grelease2tablespacepointintimerecoveryrecoverfromdroppedtablespace/ 6/7
IMPDP> Starting "SYS"."TSPITR_IMP_qyBo": IMPDP> Processing object type TRANSPORTABLE_EXPORT/PLUGTS_BLK IMPDP> Processing object type TRANSPORTABLE_EXPORT/TABLE IMPDP> Processing object type TRANSPORTABLE_EXPORT/POST_INSTANCE/PLUGTS_BLK IMPDP> Job "SYS"."TSPITR_IMP_qyBo" successfully completed at 12:51:49Import completed
contents of Memory Script:# make read write and offline the imported tablespacessql 'alter tablespace MYEXAMPLE read write';sql 'alter tablespace MYEXAMPLE offline';# enable autobackups after TSPITR is finishedsql 'begin dbms_backup_restore.AutoBackupFlag(TRUE); end;';# resync catalogresync catalog;executing Memory Script
sql statement: alter tablespace MYEXAMPLE read write
sql statement: alter tablespace MYEXAMPLE offline
sql statement: begin dbms_backup_restore.AutoBackupFlag(TRUE); end;
starting full resync of recovery catalogfull resync complete
Removing automatic instanceAutomatic instance removedauxiliary instance file +DATA/testdb/tempfile/temp.518.704033385 deletedauxiliary instance file +DATA/testdb/onlinelog/group_3.517.704033385 deletedauxiliary instance file +DATA/testdb/onlinelog/group_2.515.704033383 deletedauxiliary instance file +DATA/testdb/onlinelog/group_1.514.704033383 deletedauxiliary instance file +DATA/testdb/datafile/sysaux.509.704033355 deletedauxiliary instance file +DATA/testdb/datafile/undotbs1.513.704033355 deletedauxiliary instance file +DATA/testdb/datafile/system.511.704033355 deletedauxiliary instance file +DATA/testdb/controlfile/current.506.704033345 deletedFinished recover at 27NOV09
RMAN>
Note: After the recovery is complete, we need to bring the tablespace and datafile online as well.
SQL> alter tablespace myexample online;
Tablespace altered.
SQL> alter database datafile '+DATA/testdb/datafile/myexample.512.704033355' online;
Database altered.
SQL> select file_name from dba_data_files where tablespace_name='MYEXAMPLE';
FILE_NAME+DATA/testdb/datafile/myexample.512.704033355
28/11/2015 11g Release 2 Tablespace Point In Time Recovery – recover from dropped tablespace « Oracle DBA Tips and Techniques
http://gavinsoorma.com/2009/11/11grelease2tablespacepointintimerecoveryrecoverfromdroppedtablespace/ 7/7
+DATA/testdb/datafile/myexample.512.704033355
SQL> select table_name from dba_tables 2 where tablespace_name='MYEXAMPLE';
TABLE_NAMEMYSALESMYCOSTS
SQL> select count(*) from sh.mysales;
COUNT(*) 918843
November 27th, 2009 | Tags: 11gR2, auxiliary instance, drop tablespace, tablespace point in time recovery, tspitr | Category:Backup and Recovery, Oracle 11g release 2
