Este é um dos Labs executados pelos alunos da Nerv no Treinamento Oracle Backup & Recovery.
No Oracle, é possível voltar apenas uma Tablespace em um determinado ponto no tempo.
No 11gR2 esta operação está totalmente automatizada. Este fantástico recurso é, na verdade, uma complexa utilização de outros recursos do Oracle. Por baixo dos panos, o TSPITR cria uma nova Instance (no diretório indicado no comando de RECOVER), recupera nelas apenas a SYSTEM, SYSAUX, mais a Tablespace de UNDO e só então, a Tablespace desejada, a partir de um Backup já existente. Em seguida, esta Tablespace da nova Instance tem seus metadados exportados, e então importados na Instance original. Ou seja, dava para fazer tudo manualmente, mas daria muito mais trabalho.
Repare que ao término da operação, a Tablespace é deixada em OFFLINE. Talvez isso seja intencional, pois provavelmente o DBA irá conferir os dados antes de liberar para a utilização pelos clientes.
[oracle@OBR ~]$ sqlplus SCOTT/TIGER SQL*Plus: Release 11.2.0.2.0 Production on Sun Jan 16 16:31:23 2011 Copyright (c) 1982, 2010, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - Production With the Partitioning, Oracle Label Security, OLAP, Data Mining, Oracle Database Vault and Real Application Testing options SQL> DROP TABLE T; Table dropped. SQL> EXIT Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - Production With the Partitioning, Oracle Label Security, OLAP, Data Mining, Oracle Database Vault and Real Application Testing options [oracle@OBR ~]$ mkdir /home/oracle/auxiliary [oracle@OBR ~]$ rman CATALOG=USER_CATALOGO/USER_CATALOGO@CATALOGO TARGET / Recovery Manager: Release 11.2.0.2.0 - Production on Sun Jan 16 16:32:14 2011 Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved. connected to target database: ORCL (DBID=1267239156) connected to recovery catalog database RMAN> RECOVER TABLESPACE USUARIOS UNTIL SEQUENCE 83 AUXILIARY DESTINATION '/home/oracle/auxiliary/'; Starting recover at 16-JAN-11 allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=37 device type=DISK allocated channel: ORA_DISK_2 channel ORA_DISK_2: SID=1 device type=DISK Creating automatic instance, with SID='lssm' initialization parameters used for automatic instance: db_name=ORCL db_unique_name=lssm_tspitr_ORCL compatible=11.2.0.0.0 db_block_size=8192 db_files=200 sga_target=280M processes=50 db_create_file_dest=/home/oracle/auxiliary/ log_archive_dest_1='location=/home/oracle/auxiliary/' #No auxiliary parameter file used starting up automatic instance ORCL Oracle instance started Total System Global Area 292933632 bytes Fixed Size 1343748 bytes Variable Size 100667132 bytes Database Buffers 184549376 bytes Redo Buffers 6373376 bytes Automatic instance created Running TRANSPORT_SET_CHECK on recovery set tablespaces TRANSPORT_SET_CHECK completed successfully contents of Memory Script: { # set requested point in time set until logseq 83 thread 1; # restore the controlfile restore clone controlfile; # mount the controlfile sql clone 'alter database mount clone database'; # archive current online log sql 'alter system archive log current'; # avoid unnecessary autobackups for structural changes during TSPITR sql 'begin dbms_backup_restore.AutoBackupFlag(FALSE); end;'; # resync catalog resync catalog; } executing Memory Script executing command: SET until clause Starting restore at 16-JAN-11 allocated channel: ORA_AUX_DISK_1 channel ORA_AUX_DISK_1: SID=21 device type=DISK allocated channel: ORA_AUX_DISK_2 channel ORA_AUX_DISK_2: SID=18 device type=DISK channel ORA_AUX_DISK_1: starting datafile backup set restore channel ORA_AUX_DISK_1: restoring control file channel ORA_AUX_DISK_1: reading from backup piece /home/oracle/c-1267239156-20110116-01 channel ORA_AUX_DISK_1: piece handle=/home/oracle/c-1267239156-20110116-01 tag=TAG20110116T112118 channel ORA_AUX_DISK_1: restored backup piece 1 channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:03 output file name=/home/oracle/auxiliary/ORCL/controlfile/o1_mf_6m6gkby9_.ctl Finished restore at 16-JAN-11 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 catalog full resync complete contents of Memory Script: { # set requested point in time set until logseq 83 thread 1; plsql <<<-- tspitr_2 declare sqlstatement varchar2(512); offline_not_needed exception; pragma exception_init(offline_not_needed, -01539); begin sqlstatement := 'alter tablespace '|| 'USUARIOS' ||' offline immediate'; krmicd.writeMsg(6162, sqlstatement); krmicd.execSql(sqlstatement); exception when offline_not_needed then null; end; >>>; # set destinations for recovery set and auxiliary set datafiles set 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 10 to "/u01/app/oracle/oradata/ORCL/usuarios01.dbf"; # switch all tempfiles switch clone tempfile all; # restore the tablespaces in the recovery set and the auxiliary set restore clone datafile 1, 3, 2, 10; switch clone datafile all; } executing Memory Script executing command: SET until clause sql statement: alter tablespace USUARIOS offline immediate executing command: SET NEWNAME executing command: SET NEWNAME executing command: SET NEWNAME executing command: SET NEWNAME executing command: SET NEWNAME renamed tempfile 1 to /home/oracle/auxiliary/ORCL/datafile/o1_mf_temp_%u_.tmp in control file Starting restore at 16-JAN-11 using channel ORA_AUX_DISK_1 using channel ORA_AUX_DISK_2 channel ORA_AUX_DISK_1: starting datafile backup set restore channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set channel ORA_AUX_DISK_1: restoring datafile 00001 to /home/oracle/auxiliary/ORCL/datafile/o1_mf_system_%u_.dbf channel ORA_AUX_DISK_1: restoring datafile 00003 to /home/oracle/auxiliary/ORCL/datafile/o1_mf_undotbs1_%u_.dbf channel ORA_AUX_DISK_1: restoring datafile 00010 to /u01/app/oracle/oradata/ORCL/usuarios01.dbf channel ORA_AUX_DISK_1: reading from backup piece /home/oracle/ORCL_20110116_182_1.bkp channel ORA_AUX_DISK_2: starting datafile backup set restore channel ORA_AUX_DISK_2: specifying datafile(s) to restore from backup set channel ORA_AUX_DISK_2: restoring datafile 00002 to /home/oracle/auxiliary/ORCL/datafile/o1_mf_sysaux_%u_.dbf channel ORA_AUX_DISK_2: reading from backup piece /home/oracle/ORCL_20110116_181_1.bkp channel ORA_AUX_DISK_2: piece handle=/home/oracle/ORCL_20110116_181_1.bkp tag=TAG20110116T105556 channel ORA_AUX_DISK_2: restored backup piece 1 channel ORA_AUX_DISK_2: restore complete, elapsed time: 00:03:41 channel ORA_AUX_DISK_1: piece handle=/home/oracle/ORCL_20110116_182_1.bkp tag=TAG20110116T105556 channel ORA_AUX_DISK_1: restored backup piece 1 channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:03:51 Finished restore at 16-JAN-11 datafile 1 switched to datafile copy input datafile copy RECID=27 STAMP=740594308 file name=/home/oracle/auxiliary/ORCL/datafile/o1_mf_system_6m6gkyj2_.dbf datafile 3 switched to datafile copy input datafile copy RECID=28 STAMP=740594308 file name=/home/oracle/auxiliary/ORCL/datafile/o1_mf_undotbs1_6m6gkz5j_.dbf datafile 2 switched to datafile copy input datafile copy RECID=29 STAMP=740594308 file name=/home/oracle/auxiliary/ORCL/datafile/o1_mf_sysaux_6m6gky8n_.dbf contents of Memory Script: { # set requested point in time set until logseq 83 thread 1; # online the datafiles restored or switched sql 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 10 online"; # recover and open resetlogs recover clone database tablespace "USUARIOS", "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 10 online Starting recover at 16-JAN-11 using channel ORA_AUX_DISK_1 using channel ORA_AUX_DISK_2 starting media recovery archived log for thread 1 with sequence 80 is already on disk as file /u01/app/oracle/fast_recovery_area/ORCL/archivelog/2011_01_16/o1_mf_1_80_6m5wdfmw_.arc archived log for thread 1 with sequence 81 is already on disk as file /u01/app/oracle/fast_recovery_area/ORCL/archivelog/2011_01_16/o1_mf_1_81_6m5wfgpb_.arc archived log for thread 1 with sequence 82 is already on disk as file /u01/app/oracle/fast_recovery_area/ORCL/archivelog/2011_01_16/o1_mf_1_82_6m5wfoqc_.arc channel ORA_AUX_DISK_1: starting archived log restore to default destination channel ORA_AUX_DISK_1: restoring archived log archived log thread=1 sequence=79 channel ORA_AUX_DISK_1: reading from backup piece /home/oracle/ORCL_20110116_185_1.bkp channel ORA_AUX_DISK_1: piece handle=/home/oracle/ORCL_20110116_185_1.bkp tag=TAG20110116T112106 channel ORA_AUX_DISK_1: restored backup piece 1 channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:03 archived log file name=/home/oracle/auxiliary/1_79_739458432.dbf thread=1 sequence=79 channel clone_default: deleting archived log(s) archived log file name=/home/oracle/auxiliary/1_79_739458432.dbf RECID=102 STAMP=740594316 archived log file name=/u01/app/oracle/fast_recovery_area/ORCL/archivelog/2011_01_16/o1_mf_1_80_6m5wdfmw_.arc thread=1 sequence=80 archived log file name=/u01/app/oracle/fast_recovery_area/ORCL/archivelog/2011_01_16/o1_mf_1_81_6m5wfgpb_.arc thread=1 sequence=81 archived log file name=/u01/app/oracle/fast_recovery_area/ORCL/archivelog/2011_01_16/o1_mf_1_82_6m5wfoqc_.arc thread=1 sequence=82 media recovery complete, elapsed time: 00:00:01 Finished recover at 16-JAN-11 database opened contents of Memory Script: { # make read only the tablespace that will be exported sql clone 'alter tablespace USUARIOS read only'; # create directory for datapump import sql "create or replace directory TSPITR_DIROBJ_DPDIR as '' /home/oracle/auxiliary/''"; # create directory for datapump export sql clone "create or replace directory TSPITR_DIROBJ_DPDIR as '' /home/oracle/auxiliary/''"; } executing Memory Script sql statement: alter tablespace USUARIOS read only sql statement: create or replace directory TSPITR_DIROBJ_DPDIR as ''/home/oracle/auxiliary/'' sql statement: create or replace directory TSPITR_DIROBJ_DPDIR as ''/home/oracle/auxiliary/'' Performing export of metadata... EXPDP> Starting "SYS"."TSPITR_EXP_lssm": 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_lssm" successfully loaded/unloaded EXPDP> ****************************************************************************** EXPDP> Dump file set for SYS.TSPITR_EXP_lssm is: EXPDP> /home/oracle/auxiliary/tspitr_lssm_42593.dmp EXPDP> ****************************************************************************** EXPDP> Datafiles required for transportable tablespace USUARIOS: EXPDP> /u01/app/oracle/oradata/ORCL/usuarios01.dbf EXPDP> Job "SYS"."TSPITR_EXP_lssm" successfully completed at 16:44:14 Export completed contents of Memory Script: { # shutdown clone before import shutdown clone immediate # drop target tablespaces before importing them back sql 'drop tablespace USUARIOS including contents keep datafiles'; } executing Memory Script database closed database dismounted Oracle instance shut down sql statement: drop tablespace USUARIOS including contents keep datafiles Performing import of metadata... IMPDP> Master table "SYS"."TSPITR_IMP_lssm" successfully loaded/unloaded IMPDP> Starting "SYS"."TSPITR_IMP_lssm": 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_lssm" successfully completed at 16:45:31 Import completed contents of Memory Script: { # make read write and offline the imported tablespaces sql 'alter tablespace USUARIOS read write'; sql 'alter tablespace USUARIOS offline'; # enable autobackups after TSPITR is finished sql 'begin dbms_backup_restore.AutoBackupFlag(TRUE); end;'; # resync catalog resync catalog; } executing Memory Script sql statement: alter tablespace USUARIOS read write sql statement: alter tablespace USUARIOS offline sql statement: begin dbms_backup_restore.AutoBackupFlag(TRUE); end; starting full resync of recovery catalog full resync complete Removing automatic instance Automatic instance removed auxiliary instance file /home/oracle/auxiliary/ORCL/datafile/o1_mf_temp_6m6gsrvx_.tmp deleted auxiliary instance file /home/oracle/auxiliary/ORCL/onlinelog/o1_mf_3_6m6gsmq5_.log deleted auxiliary instance file /home/oracle/auxiliary/ORCL/onlinelog/o1_mf_2_6m6gskmr_.log deleted auxiliary instance file /home/oracle/auxiliary/ORCL/onlinelog/o1_mf_1_6m6gshdw_.log deleted auxiliary instance file /home/oracle/auxiliary/ORCL/datafile/o1_mf_sysaux_6m6gky8n_.dbf deleted auxiliary instance file /home/oracle/auxiliary/ORCL/datafile/o1_mf_undotbs1_6m6gkz5j_.dbf deleted auxiliary instance file /home/oracle/auxiliary/ORCL/datafile/o1_mf_system_6m6gkyj2_.dbf deleted auxiliary instance file /home/oracle/auxiliary/ORCL/controlfile/o1_mf_6m6gkby9_.ctl deleted Finished recover at 16-JAN-11 RMAN> EXIT Recovery Manager complete. [oracle@OBR ~]$ sqlplus SCOTT/TIGER SQL*Plus: Release 11.2.0.2.0 Production on Sun Jan 16 16:46:26 2011 Copyright (c) 1982, 2010, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - Production With the Partitioning, Oracle Label Security, OLAP, Data Mining, Oracle Database Vault and Real Application Testing options SQL> DESC T; Name Null? Type ----------------------------------------- -------- ---------------------------- OBJECT_NAME VARCHAR2(128) SUBOBJECT_NAME VARCHAR2(30) OBJECT_ID NUMBER DATA_OBJECT_ID NUMBER OBJECT_TYPE VARCHAR2(19) CREATED DATE LAST_DDL_TIME DATE TIMESTAMP VARCHAR2(19) STATUS VARCHAR2(7) TEMPORARY VARCHAR2(1) GENERATED VARCHAR2(1) SECONDARY VARCHAR2(1) NAMESPACE NUMBER EDITION_NAME VARCHAR2(30) SQL> SELECT COUNT(*) FROM T; SELECT COUNT(*) FROM T * ERROR at line 1: ORA-00376: file 10 cannot be read at this time ORA-01110: data file 10: '/u01/app/oracle/oradata/ORCL/usuarios01.dbf' SQL> CONN / AS SYSDBA Connected. SQL> ALTER TABLESPACE USUARIOS ONLINE; Tablespace altered. SQL> CONN SCOTT/TIGER Connected. SQL> SELECT COUNT(*) FROM T; COUNT(*) ---------- 7 SQL>
Com 20 anos de experiência profissional, Oracle ACE Member – eleito pela Oracle Corporation um dos maiores especialistas do mundo em Oracle Database- Trabalhou em grande parte dos maiores bancos de dados Oracle do Brasil. Certificado em Oracle, SQL Server, DB2, MySQL, Sybase e Websphere.
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