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分类: Oracle

在RMAN中使用until time子句对Non-CDB中的表执行按时间点恢复操作步骤如下
1.对整个Non-CDB(orcl)生成RMAN备份

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scn与时间,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.

SQL>  select sysdate from dual;

SYSDATE
-------------------
2018-01-10 20:10:01

1 row selected.

SQL> select current_scn   from v$database;

CURRENT_SCN
-----------
     447215

1 row selected.

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 hh24: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 time '2018-01-10 20:10:01'
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 22:07:43
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=49 device type=DISK
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='BxcB'

initialization parameters used for automatic instance:
db_name=ORCL
db_unique_name=BxcB_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  time "2018-01-10 20:10:01";
# 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 22:09:04
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: 00:00:04
output file name=/ora_xtts/recover/ORCL/controlfile/o1_mf_f5d7n52r_.ctl
Finished restore at 2018-01-10 22:09:10

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  time "2018-01-10 20:10:01";
# 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 22:09:18
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 22:10:04

datafile 1 switched to datafile copy
input datafile copy RECID=4 STAMP=965081404 file name=/ora_xtts/recover/ORCL/datafile/o1_mf_system_f5d7nhmp_.dbf
datafile 3 switched to datafile copy
input datafile copy RECID=5 STAMP=965081404 file name=/ora_xtts/recover/ORCL/datafile/o1_mf_undotbs1_f5d7nhq5_.dbf
datafile 2 switched to datafile copy
input datafile copy RECID=6 STAMP=965081405 file name=/ora_xtts/recover/ORCL/datafile/o1_mf_sysaux_f5d7nhot_.dbf

contents of Memory Script:
{
# set requested point in time
set until  time "2018-01-10 20:10:01";
# 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 22:10:06
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 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
media recovery complete, elapsed time: 00:00:01
Finished recover at 2018-01-10 22:10:09

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_f5d7n52r_.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_f5d7n52r_.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  time "2018-01-10 20:10:01";
# 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 22:11:13
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/BXCB_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 22:12:09

datafile 4 switched to datafile copy
input datafile copy RECID=8 STAMP=965081529 file name=/ora_xtts/recover/BXCB_PITR_ORCL/datafile/o1_mf_users_f5d7r2q4_.dbf

contents of Memory Script:
{
# set requested point in time
set until  time "2018-01-10 20:10:01";
# 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 22:12:10
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 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
media recovery complete, elapsed time: 00:00:00
Finished recover at 2018-01-10 22:12:14

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_BxcB_tfoq":
   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_BxcB_tfoq" successfully loaded/unloaded
   EXPDP> ******************************************************************************
   EXPDP> Dump file set for SYS.TSPITR_EXP_BxcB_tfoq is:
   EXPDP>   /ora_xtts/dump/t_emp_recvr.dmp
   EXPDP> Job "SYS"."TSPITR_EXP_BxcB_tfoq" successfully completed at Wed Jan 10 22:13:08 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_BxcB_Enlv" successfully loaded/unloaded
   IMPDP> Starting "SYS"."TSPITR_IMP_BxcB_Enlv":
   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_BxcB_Enlv" successfully completed at Wed Jan 10 22:13:48 2018 elapsed 0 00:00:33
Import completed


Removing automatic instance
Automatic instance removed
auxiliary instance file /ora_xtts/recover/ORCL/datafile/o1_mf_tempts1_f5d7p27f_.tmp deleted
auxiliary instance file /ora_xtts/recover/BXCB_PITR_ORCL/onlinelog/o1_mf_3_f5d7syo5_.log deleted
auxiliary instance file /ora_xtts/recover/BXCB_PITR_ORCL/onlinelog/o1_mf_2_f5d7syng_.log deleted
auxiliary instance file /ora_xtts/recover/BXCB_PITR_ORCL/onlinelog/o1_mf_1_f5d7symr_.log deleted
auxiliary instance file /ora_xtts/recover/BXCB_PITR_ORCL/datafile/o1_mf_users_f5d7r2q4_.dbf deleted
auxiliary instance file /ora_xtts/recover/ORCL/datafile/o1_mf_sysaux_f5d7nhot_.dbf deleted
auxiliary instance file /ora_xtts/recover/ORCL/datafile/o1_mf_undotbs1_f5d7nhq5_.dbf deleted
auxiliary instance file /ora_xtts/recover/ORCL/datafile/o1_mf_system_f5d7nhmp_.dbf deleted
auxiliary instance file /ora_xtts/recover/ORCL/controlfile/o1_mf_f5d7n52r_.ctl deleted
auxiliary instance file t_emp_recvr.dmp deleted
Finished recover at 2018-01-10 22:13:53

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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