Oracle12C使用UNTILSEQUENCE子句对Non-CDB中的表执行按时间点恢复
Oracle 12C使用UNTIL SEQUENCE子句对Non-CDB中的表执行按时间点恢复执行操作如下
1.对整个Non-CDB(orcl)生成RMAN备份
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RMAN> backup as compressed backupset database format '+data/backup/%d_%I_%U_%t' plus archivelog format 'arc_%d_%T_%U'; Starting backup at 10-JAN-18 current log archived using channel ORA_DISK_1 channel ORA_DISK_1: starting compressed archived log backup set channel ORA_DISK_1: specifying archived log(s) in backup set input archived log thread=1 sequence=13 RECID=1 STAMP=964995986 input archived log thread=1 sequence=14 RECID=2 STAMP=965007422 input archived log thread=1 sequence=15 RECID=3 STAMP=965007493 input archived log thread=1 sequence=16 RECID=4 STAMP=965007542 input archived log thread=1 sequence=17 RECID=5 STAMP=965011311 input archived log thread=1 sequence=18 RECID=6 STAMP=965011687 channel ORA_DISK_1: starting piece 1 at 10-JAN-18 channel ORA_DISK_1: finished piece 1 at 10-JAN-18 piece handle=/u01/app/oracle/product/12.2.0/db/dbs/arc_ORCL_20180110_21so9q78_1_1 tag=TAG20180110T024807 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:00:15 Finished backup at 10-JAN-18 Starting backup at 10-JAN-18 using channel ORA_DISK_1 channel ORA_DISK_1: starting compressed full datafile backup set channel ORA_DISK_1: specifying datafile(s) in backup set input datafile file number=00004 name=+DATA/orcl/datafile/users01.dbf input datafile file number=00001 name=+DATA/orcl/datafile/system01.dbf input datafile file number=00002 name=+DATA/orcl/datafile/sysaux01.dbf input datafile file number=00003 name=+DATA/orcl/datafile/undotbs01.dbf input datafile file number=00005 name=+DATA/orcl/datafile/usertbs01.dbf channel ORA_DISK_1: starting piece 1 at 10-JAN-18 channel ORA_DISK_1: finished piece 1 at 10-JAN-18 piece handle=+DATA/backup/orcl_1492772871_22so9q7p_1_1_965011705 tag=TAG20180110T024824 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:00:45 Finished backup at 10-JAN-18 Starting backup at 10-JAN-18 current log archived using channel ORA_DISK_1 channel ORA_DISK_1: starting compressed archived log backup set channel ORA_DISK_1: specifying archived log(s) in backup set input archived log thread=1 sequence=19 RECID=7 STAMP=965011751 channel ORA_DISK_1: starting piece 1 at 10-JAN-18 channel ORA_DISK_1: finished piece 1 at 10-JAN-18 piece handle=/u01/app/oracle/product/12.2.0/db/dbs/arc_ORCL_20180110_23so9q98_1_1 tag=TAG20180110T024912 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01 Finished backup at 10-JAN-18 Starting Control File and SPFILE Autobackup at 10-JAN-18 piece handle=+DATA/backup/c-1492772871-20180110-01 comment=NONE Finished Control File and SPFILE Autobackup at 10-JAN-18
2.在删除表t_emp之前记录当前log sequence,在执行恢复时它们被用来指定恢复时间点
SQL> select count(*) from t_emp; COUNT(*) ---------- 107 1 row selected.
记录当前时间点的logseq号为29
SQL> select sequence#, status from v$log; SEQUENCE# STATUS ---------- -------- 28 INACTIVE 29 CURRENT 27 INACTIVE 3 rows selected.
进行日志切换,记录truncate操作之前的logseq号为30,并执行truncate操作
SQL> alter system switch logfile; System altered. SQL> select sequence#, status from v$log; SEQUENCE# STATUS ---------- ---------------- 28 INACTIVE 29 ACTIVE 30 CURRENT SQL> truncate table t_emp; Table truncated.
进行日志切换,记录truncate操作之后的logseq号为31
SQL> alter system switch logfile; System altered. SQL> select sequence#, status from v$log; SEQUENCE# STATUS ---------- ---------------- 31 CURRENT 29 ACTIVE 30 ACTIVE
3.启动RMAN并使用有sysbacup或sysdba权限的用户连接到目标数据库
[oracle@jytest3 ~]$ export NLS_DATE_FORMAT='yyyy-mm-dd hh34:mi:ss' [oracle@jytest3 ~]$ rman target/ Recovery Manager: Release 12.2.0.1.0 - Production on Wed Jan 10 02:22:13 2018 Copyright (c) 1982, 2017, Oracle and/or its affiliates. All rights reserved. connected to target database: ORCL (DBID=1492772871)
4.通过使用recover table命令将要被恢复的表或表分区恢复到指定的时间点。 使用auxiliary destination子句(/ora_xtts/recover辅助数据文件存储目录)与until scn来指定恢复时间点,并且在recover命令中使用子句 dump file与datapump destination,指定包含被恢复表或表分区的导出dump文件的文件名(t_emp_recvr.dmp)与存储位置(/ora_xtts/dump)。 使用remap table子句将hr.t_emp恢复成jy.t_emp_new。使用remap tablespace子 句将表t_emp从hr用户方案恢复到jy用户方案中
RMAN> run 2> { 3> recover table hr.t_emp 4> until sequence 30 5> auxiliary destination '/ora_xtts/recover' 6> datapump destination '/ora_xtts/dump' 7> dump file 't_emp_recvr.dmp' 8> remap table 'HR'.'T_EMP':'JY'.'T_EMP_NEW' 9> remap tablespace 'USERS':'USERTBS'; 10> } Starting recover at 2018-01-10 22:32:35 using channel ORA_DISK_1 RMAN-05026: warning: presuming following set of tablespaces applies to specified point-in-time List of tablespaces expected to have UNDO segments Tablespace SYSTEM Tablespace UNDOTBS1 Creating automatic instance, with SID='zdjl' initialization parameters used for automatic instance: db_name=ORCL db_unique_name=zdjl_pitr_ORCL compatible=12.2.0 db_block_size=8192 db_files=200 diagnostic_dest=/u01/app/oracle _system_trig_enabled=FALSE sga_target=1024M processes=120 db_create_file_dest=/ora_xtts/recover log_archive_dest_1='location=/ora_xtts/recover' #No auxiliary parameter file used starting up automatic instance ORCL Oracle instance started Total System Global Area 1073741824 bytes Fixed Size 8628936 bytes Variable Size 293602616 bytes Database Buffers 763363328 bytes Redo Buffers 8146944 bytes Automatic instance created contents of Memory Script: { # set requested point in time set until logseq 30 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'; } executing Memory Script executing command: SET until clause Starting restore at 2018-01-10 22:33:40 allocated channel: ORA_AUX_DISK_1 channel ORA_AUX_DISK_1: SID=6 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 +DATA/backup/c-1492772871-20180110-02 channel ORA_AUX_DISK_1: piece handle=+DATA/backup/c-1492772871-20180110-02 tag=TAG20180110T200959 channel ORA_AUX_DISK_1: restored backup piece 1 channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:05 output file name=/ora_xtts/recover/ORCL/controlfile/o1_mf_f5d929nw_.ctl Finished restore at 2018-01-10 22:33:46 sql statement: alter database mount clone database sql statement: alter system archive log current contents of Memory Script: { # set requested point in time set until logseq 30 thread 1; # 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; # switch all tempfiles switch clone tempfile all; # restore the tablespaces in the recovery set and the auxiliary set restore clone datafile 1, 3, 2; 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 renamed tempfile 1 to /ora_xtts/recover/ORCL/datafile/o1_mf_tempts1_%u_.tmp in control file Starting restore at 2018-01-10 22:33:55 using channel ORA_AUX_DISK_1 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 /ora_xtts/recover/ORCL/datafile/o1_mf_system_%u_.dbf channel ORA_AUX_DISK_1: restoring datafile 00003 to /ora_xtts/recover/ORCL/datafile/o1_mf_undotbs1_%u_.dbf channel ORA_AUX_DISK_1: restoring datafile 00002 to /ora_xtts/recover/ORCL/datafile/o1_mf_sysaux_%u_.dbf channel ORA_AUX_DISK_1: reading from backup piece +DATA/backup/orcl_1492772871_26sobn77_1_1_965074151 channel ORA_AUX_DISK_1: piece handle=+DATA/backup/orcl_1492772871_26sobn77_1_1_965074151 tag=TAG20180110T200911 channel ORA_AUX_DISK_1: restored backup piece 1 channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:45 Finished restore at 2018-01-10 22:34:41 datafile 1 switched to datafile copy input datafile copy RECID=4 STAMP=965082881 file name=/ora_xtts/recover/ORCL/datafile/o1_mf_system_f5d92n67_.dbf datafile 3 switched to datafile copy input datafile copy RECID=5 STAMP=965082881 file name=/ora_xtts/recover/ORCL/datafile/o1_mf_undotbs1_f5d92n7d_.dbf datafile 2 switched to datafile copy input datafile copy RECID=6 STAMP=965082881 file name=/ora_xtts/recover/ORCL/datafile/o1_mf_sysaux_f5d92n6t_.dbf contents of Memory Script: { # set requested point in time set until logseq 30 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"; # recover and open database read only recover clone database tablespace "SYSTEM", "UNDOTBS1", "SYSAUX"; sql clone 'alter database open read only'; } 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 Starting recover at 2018-01-10 22:34:43 using channel ORA_AUX_DISK_1 starting media recovery archived log for thread 1 with sequence 24 is already on disk as file +DATA/arch/orcl/1_24_964992135.dbf archived log for thread 1 with sequence 25 is already on disk as file +DATA/arch/orcl/1_25_964992135.dbf archived log for thread 1 with sequence 26 is already on disk as file +DATA/arch/orcl/1_26_964992135.dbf archived log for thread 1 with sequence 27 is already on disk as file +DATA/arch/orcl/1_27_964992135.dbf archived log for thread 1 with sequence 28 is already on disk as file +DATA/arch/orcl/1_28_964992135.dbf archived log for thread 1 with sequence 29 is already on disk as file +DATA/arch/orcl/1_29_964992135.dbf archived log file name=+DATA/arch/orcl/1_24_964992135.dbf thread=1 sequence=24 archived log file name=+DATA/arch/orcl/1_25_964992135.dbf thread=1 sequence=25 archived log file name=+DATA/arch/orcl/1_26_964992135.dbf thread=1 sequence=26 archived log file name=+DATA/arch/orcl/1_27_964992135.dbf thread=1 sequence=27 archived log file name=+DATA/arch/orcl/1_28_964992135.dbf thread=1 sequence=28 archived log file name=+DATA/arch/orcl/1_29_964992135.dbf thread=1 sequence=29 media recovery complete, elapsed time: 00:00:24 Finished recover at 2018-01-10 22:35:09 sql statement: alter database open read only contents of Memory Script: { sql clone "create spfile from memory"; shutdown clone immediate; startup clone nomount; sql clone "alter system set control_files = ''/ora_xtts/recover/ORCL/controlfile/o1_mf_f5d929nw_.ctl'' comment= ''RMAN set'' scope=spfile"; shutdown clone immediate; startup clone nomount; # mount database sql clone 'alter database mount clone database'; } executing Memory Script sql statement: create spfile from memory database closed database dismounted Oracle instance shut down connected to auxiliary database (not started) Oracle instance started Total System Global Area 1073741824 bytes Fixed Size 8628936 bytes Variable Size 293602616 bytes Database Buffers 763363328 bytes Redo Buffers 8146944 bytes sql statement: alter system set control_files = ''/ora_xtts/recover/ORCL/controlfile/o1_mf_f5d929nw_.ctl'' comment= ''RMAN set'' scope=spfile Oracle instance shut down connected to auxiliary database (not started) Oracle instance started Total System Global Area 1073741824 bytes Fixed Size 8628936 bytes Variable Size 293602616 bytes Database Buffers 763363328 bytes Redo Buffers 8146944 bytes sql statement: alter database mount clone database contents of Memory Script: { # set requested point in time set until logseq 30 thread 1; # set destinations for recovery set and auxiliary set datafiles set newname for datafile 4 to new; # restore the tablespaces in the recovery set and the auxiliary set restore clone datafile 4; switch clone datafile all; } executing Memory Script executing command: SET until clause executing command: SET NEWNAME Starting restore at 2018-01-10 22:36:13 allocated channel: ORA_AUX_DISK_1 channel ORA_AUX_DISK_1: SID=7 device type=DISK 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 00004 to /ora_xtts/recover/ZDJL_PITR_ORCL/datafile/o1_mf_users_%u_.dbf channel ORA_AUX_DISK_1: reading from backup piece +DATA/backup/orcl_1492772871_26sobn77_1_1_965074151 channel ORA_AUX_DISK_1: piece handle=+DATA/backup/orcl_1492772871_26sobn77_1_1_965074151 tag=TAG20180110T200911 channel ORA_AUX_DISK_1: restored backup piece 1 channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:55 Finished restore at 2018-01-10 22:37:09 datafile 4 switched to datafile copy input datafile copy RECID=8 STAMP=965083029 file name=/ora_xtts/recover/ZDJL_PITR_ORCL/datafile/o1_mf_users_f5d96ycb_.dbf contents of Memory Script: { # set requested point in time set until logseq 30 thread 1; # online the datafiles restored or switched sql clone "alter database datafile 4 online"; # recover and open resetlogs recover clone database tablespace "USERS", "SYSTEM", "UNDOTBS1", "SYSAUX" delete archivelog; alter clone database open resetlogs; } executing Memory Script executing command: SET until clause sql statement: alter database datafile 4 online Starting recover at 2018-01-10 22:37:10 using channel ORA_AUX_DISK_1 starting media recovery archived log for thread 1 with sequence 24 is already on disk as file +DATA/arch/orcl/1_24_964992135.dbf archived log for thread 1 with sequence 25 is already on disk as file +DATA/arch/orcl/1_25_964992135.dbf archived log for thread 1 with sequence 26 is already on disk as file +DATA/arch/orcl/1_26_964992135.dbf archived log for thread 1 with sequence 27 is already on disk as file +DATA/arch/orcl/1_27_964992135.dbf archived log for thread 1 with sequence 28 is already on disk as file +DATA/arch/orcl/1_28_964992135.dbf archived log for thread 1 with sequence 29 is already on disk as file +DATA/arch/orcl/1_29_964992135.dbf archived log file name=+DATA/arch/orcl/1_24_964992135.dbf thread=1 sequence=24 archived log file name=+DATA/arch/orcl/1_25_964992135.dbf thread=1 sequence=25 archived log file name=+DATA/arch/orcl/1_26_964992135.dbf thread=1 sequence=26 archived log file name=+DATA/arch/orcl/1_27_964992135.dbf thread=1 sequence=27 archived log file name=+DATA/arch/orcl/1_28_964992135.dbf thread=1 sequence=28 archived log file name=+DATA/arch/orcl/1_29_964992135.dbf thread=1 sequence=29 media recovery complete, elapsed time: 00:00:06 Finished recover at 2018-01-10 22:37:18 database opened contents of Memory Script: { # create directory for datapump import sql "create or replace directory TSPITR_DIROBJ_DPDIR as '' /ora_xtts/dump''"; # create directory for datapump export sql clone "create or replace directory TSPITR_DIROBJ_DPDIR as '' /ora_xtts/dump''"; } executing Memory Script sql statement: create or replace directory TSPITR_DIROBJ_DPDIR as ''/ora_xtts/dump'' sql statement: create or replace directory TSPITR_DIROBJ_DPDIR as ''/ora_xtts/dump'' Performing export of tables... EXPDP> Starting "SYS"."TSPITR_EXP_zdjl_ctic": EXPDP> Processing object type TABLE_EXPORT/TABLE/TABLE_DATA EXPDP> Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS EXPDP> Processing object type TABLE_EXPORT/TABLE/STATISTICS/MARKER EXPDP> Processing object type TABLE_EXPORT/TABLE/TABLE EXPDP> . . exported "HR"."T_EMP" 17.08 KB 107 rows EXPDP> Master table "SYS"."TSPITR_EXP_zdjl_ctic" successfully loaded/unloaded EXPDP> ****************************************************************************** EXPDP> Dump file set for SYS.TSPITR_EXP_zdjl_ctic is: EXPDP> /ora_xtts/dump/t_emp_recvr.dmp EXPDP> Job "SYS"."TSPITR_EXP_zdjl_ctic" successfully completed at Wed Jan 10 22:38:12 2018 elapsed 0 00:00:33 Export completed contents of Memory Script: { # shutdown clone before import shutdown clone abort } executing Memory Script Oracle instance shut down Performing import of tables... IMPDP> Master table "SYS"."TSPITR_IMP_zdjl_nBfi" successfully loaded/unloaded IMPDP> Starting "SYS"."TSPITR_IMP_zdjl_nBfi": IMPDP> Processing object type TABLE_EXPORT/TABLE/TABLE IMPDP> Processing object type TABLE_EXPORT/TABLE/TABLE_DATA IMPDP> . . imported "JY"."T_EMP_NEW" 17.08 KB 107 rows IMPDP> Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS IMPDP> Processing object type TABLE_EXPORT/TABLE/STATISTICS/MARKER IMPDP> Job "SYS"."TSPITR_IMP_zdjl_nBfi" successfully completed at Wed Jan 10 22:38:51 2018 elapsed 0 00:00:32 Import completed Removing automatic instance Automatic instance removed auxiliary instance file /ora_xtts/recover/ORCL/datafile/o1_mf_tempts1_f5d94xrx_.tmp deleted auxiliary instance file /ora_xtts/recover/ZDJL_PITR_ORCL/onlinelog/o1_mf_3_f5d98yqq_.log deleted auxiliary instance file /ora_xtts/recover/ZDJL_PITR_ORCL/onlinelog/o1_mf_2_f5d98yq4_.log deleted auxiliary instance file /ora_xtts/recover/ZDJL_PITR_ORCL/onlinelog/o1_mf_1_f5d98ypg_.log deleted auxiliary instance file /ora_xtts/recover/ZDJL_PITR_ORCL/datafile/o1_mf_users_f5d96ycb_.dbf deleted auxiliary instance file /ora_xtts/recover/ORCL/datafile/o1_mf_sysaux_f5d92n6t_.dbf deleted auxiliary instance file /ora_xtts/recover/ORCL/datafile/o1_mf_undotbs1_f5d92n7d_.dbf deleted auxiliary instance file /ora_xtts/recover/ORCL/datafile/o1_mf_system_f5d92n67_.dbf deleted auxiliary instance file /ora_xtts/recover/ORCL/controlfile/o1_mf_f5d929nw_.ctl deleted auxiliary instance file t_emp_recvr.dmp deleted Finished recover at 2018-01-10 22:38:56
5.验证表hr.t_emp的数据是否成功恢复到表jy.t_emp_new中,从查询记录可以看到已经成功恢复到表jy.t_emp_new中。
SQL> select count(*) from jy.t_emp_new; COUNT(*) ---------- 107
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