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使用Oracle10g新特性,跨越Resetlogs时间点进行恢复

在Oracle10g以前,在进行了不完全恢复使用resetlogs选项打开数据库以后,Oracle建议你要立即进行全备份。
因为日志序号会被置位,以防止后续日志被应用。resetlogs之前的备份将不能用于进行跨域resetlogs时间点的恢复。

在Oracle10g中,Oracle允许跨越resetlogs时间点进行完全/不完全恢复。
看一下测试的例子:
1.全备份数据库
$ rman target /

Recovery Manager: Release 10.1.0.2.0 - 64bit Production

Copyright (c) 1995, 2004, Oracle.  All rights reserved.

connected to target database: EYGLE (DBID=1337390772)

RMAN> backup database plus archivelog delete all input;


Starting backup at 2005-04-05 16:29:08
current log archived
using target database controlfile instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=143 devtype=DISK
channel ORA_DISK_1: starting archive log backupset
channel ORA_DISK_1: specifying archive log(s) in backup set
input archive log thread=1 sequence=3 recid=294 stamp=554823466
input archive log thread=1 sequence=4 recid=295 stamp=554828647
input archive log thread=1 sequence=5 recid=297 stamp=554833749
channel ORA_DISK_1: starting piece 1 at 2005-04-05 16:29:16
channel ORA_DISK_1: finished piece 1 at 2005-04-05 16:29:19
piece handle=/data5/flash_recovery_area/EYGLE/backupset/2005_04_05/o1_mf_annnn_TAG20050405T162914_154m2woc_.bkp comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:04
channel ORA_DISK_1: deleting archive log(s)
archive log filename=/data5/flash_recovery_area/EYGLE/archivelog/2005_04_05/o1_mf_1_3_154919qm_.arc recid=294 stamp=554823466
archive log filename=/data5/flash_recovery_area/EYGLE/archivelog/2005_04_05/o1_mf_1_4_154g3728_.arc recid=295 stamp=554828647
archive log filename=/data5/flash_recovery_area/EYGLE/archivelog/2005_04_05/o1_mf_1_5_154m2og4_.arc recid=297 stamp=554833749
Finished backup at 2005-04-05 16:29:20

Starting backup at 2005-04-05 16:29:21
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00009 name=/data1/oradata/systemfile/bigtbs.dbf
input datafile fno=00001 name=/opt/oracle/oradata/eygle/system01.dbf
input datafile fno=00006 name=/opt/oracle/oradata/eygle/EYGLE/datafile/o1_mf_test_03xv34ny_.dbf
input datafile fno=00002 name=/opt/oracle/oradata/eygle/undotbs01.dbf
input datafile fno=00003 name=/opt/oracle/oradata/eygle/sysaux01.dbf
input datafile fno=00010 name=/opt/oracle/oradata/eygle/dfmbrc.dbf
input datafile fno=00008 name=/opt/oracle/oradata/eygle/trans01.dbf
channel ORA_DISK_1: starting piece 1 at 2005-04-05 16:29:22
channel ORA_DISK_1: finished piece 1 at 2005-04-05 16:31:07
piece handle=/data5/flash_recovery_area/EYGLE/backupset/2005_04_05/o1_mf_nnndf_TAG20050405T162921_154m33kf_.bkp comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:01:45
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00005 name=/data1/oradata/systemfile/eygle01.dbf
input datafile fno=00004 name=/opt/oracle/oradata/eygle/users01.dbf
input datafile fno=00007 name=/opt/oracle/oradata/eygle/EYGLE/datafile/o1_mf_itpub_03xv5g66_.dbf
channel ORA_DISK_1: starting piece 1 at 2005-04-05 16:31:08
channel ORA_DISK_1: finished piece 1 at 2005-04-05 16:31:33
piece handle=/data5/flash_recovery_area/EYGLE/backupset/2005_04_05/o1_mf_nnndf_TAG20050405T162921_154m6dxm_.bkp comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:25
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00011 name=/opt/oracle/oradata/eygle/t2k01.dbf
channel ORA_DISK_1: starting piece 1 at 2005-04-05 16:31:34
channel ORA_DISK_1: finished piece 1 at 2005-04-05 16:31:41
piece handle=/data5/flash_recovery_area/EYGLE/backupset/2005_04_05/o1_mf_nnndf_TAG20050405T162921_154m76kz_.bkp comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:07
Finished backup at 2005-04-05 16:31:41

Starting backup at 2005-04-05 16:31:41
current log archived
using channel ORA_DISK_1
channel ORA_DISK_1: starting archive log backupset
channel ORA_DISK_1: specifying archive log(s) in backup set
input archive log thread=1 sequence=6 recid=298 stamp=554833902
channel ORA_DISK_1: starting piece 1 at 2005-04-05 16:31:44
channel ORA_DISK_1: finished piece 1 at 2005-04-05 16:31:47
piece handle=/data5/flash_recovery_area/EYGLE/backupset/2005_04_05/o1_mf_annnn_TAG20050405T163142_154m7jpo_.bkp comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:04
channel ORA_DISK_1: deleting archive log(s)
archive log filename=/data5/flash_recovery_area/EYGLE/archivelog/2005_04_05/o1_mf_1_6_154m7gb3_.arc recid=298 stamp=554833902
Finished backup at 2005-04-05 16:31:47

Starting Control File and SPFILE Autobackup at 2005-04-05 16:31:48
piece handle=/data5/flash_recovery_area/EYGLE/autobackup/2005_04_05/o1_mf_s_554833908_154m7qps_.bkp comment=NONE
Finished Control File and SPFILE Autobackup at 2005-04-05 16:31:56

RMAN> exit


Recovery Manager complete.

2.进行数据更改
$ sqlplus "/ as sysdba"

SQL*Plus: Release 10.1.0.2.0 - Production on Tue Apr 5 16:32:23 2005

Copyright (c) 1982, 2004, Oracle.  All rights reserved.


Connected to:
Oracle Database 10g Enterprise Edition Release 10.1.0.2.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options

SYS AS SYSDBA on 2005-04-05 16:32:23 >alter system switch logfile;

System altered.

SYS AS SYSDBA on 2005-04-05 16:32:30 >select count(*) from t;

  COUNT(*)
----------
     18956

SYS AS SYSDBA on 2005-04-05 16:33:03 >insert into t select * from t;

18956 rows created.

SYS AS SYSDBA on 2005-04-05 16:33:17 >commit;

Commit complete.

SYS AS SYSDBA on 2005-04-05 16:33:19 >alter system switch logfile;

System altered.

SYS AS SYSDBA on 2005-04-05 16:33:45 >truncate table t;

Table truncated.

SYS AS SYSDBA on 2005-04-05 16:34:58 >alter system switch logfile;

System altered.

此时的日志序列情况如下:
SYS AS SYSDBA on 2005-04-05 16:35:00 >select * from v$log_history where recid >1811;

     RECID      STAMP    THREAD#  SEQUENCE# FIRST_CHANGE# FIRST_TIME          NEXT_CHANGE# RESETLOGS_CHANGE# RESETLOGS_TIME
---------- ---------- ---------- ---------- ------------- ------------------- ------------ ----------------- -------------------
      1812  554813757          1          1      10923677 2005-04-05 09:54:53     10925720          10923677 2005-04-05 09:54:53
      1813  554813974          1          2      10925720 2005-04-05 10:55:57     10925827          10923677 2005-04-05 09:54:53
      1814  554823464          1          3      10925827 2005-04-05 10:59:34     10947409          10923677 2005-04-05 09:54:53
      1815  554828646          1          4      10947409 2005-04-05 13:37:44     10950318          10923677 2005-04-05 09:54:53
      1816  554833748          1          5      10950318 2005-04-05 15:04:06     10953123          10923677 2005-04-05 09:54:53
      1817  554833901          1          6      10953123 2005-04-05 16:29:08     10953187          10923677 2005-04-05 09:54:53
      1818  554833950          1          7      10953187 2005-04-05 16:31:41     10953213          10923677 2005-04-05 09:54:53
      1819  554834005          1          8      10953213 2005-04-05 16:32:30     10953633          10923677 2005-04-05 09:54:53
      1820  554834118          1          9      10953633 2005-04-05 16:33:25     10953726          10923677 2005-04-05 09:54:53

9 rows selected.

关闭数据库:
SYS AS SYSDBA on 2005-04-05 16:35:18 >shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.

SYS AS SYSDBA on 2005-04-05 16:37:30 >exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.1.0.2.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options

3.执行不完全恢复
$ rman target /

Recovery Manager: Release 10.1.0.2.0 - 64bit Production

Copyright (c) 1995, 2004, Oracle.  All rights reserved.

connected to target database (not started)

RMAN> startup mount;

Oracle instance started
database mounted

Total System Global Area     314572800 bytes

Fixed Size                     1301704 bytes
Variable Size                261890872 bytes
Database Buffers              50331648 bytes
Redo Buffers                   1048576 bytes

RMAN> run {
2> set until sequence 8 thread 1;
3> restore database;
4> recover database;
5> }

executing command: SET until clause
using target database controlfile instead of recovery catalog

Starting restore at 2005-04-05 16:39:17
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=160 devtype=DISK

datafile 8 not processed because file is read-only
channel ORA_DISK_1: starting datafile backupset restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00001 to /opt/oracle/oradata/eygle/system01.dbf
restoring datafile 00002 to /opt/oracle/oradata/eygle/undotbs01.dbf
restoring datafile 00003 to /opt/oracle/oradata/eygle/sysaux01.dbf
restoring datafile 00006 to /opt/oracle/oradata/eygle/EYGLE/datafile/o1_mf_test_03xv34ny_.dbf
restoring datafile 00009 to /data1/oradata/systemfile/bigtbs.dbf
restoring datafile 00010 to /opt/oracle/oradata/eygle/dfmbrc.dbf
channel ORA_DISK_1: restored backup piece 1
piece handle=/data5/flash_recovery_area/EYGLE/backupset/2005_04_05/o1_mf_nnndf_TAG20050405T162921_154m33kf_.bkp tag=TAG20050405T162921
channel ORA_DISK_1: restore complete
channel ORA_DISK_1: starting datafile backupset restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00004 to /opt/oracle/oradata/eygle/users01.dbf
restoring datafile 00005 to /data1/oradata/systemfile/eygle01.dbf
restoring datafile 00007 to /opt/oracle/oradata/eygle/EYGLE/datafile/o1_mf_itpub_03xv5g66_.dbf
channel ORA_DISK_1: restored backup piece 1
piece handle=/data5/flash_recovery_area/EYGLE/backupset/2005_04_05/o1_mf_nnndf_TAG20050405T162921_154m6dxm_.bkp tag=TAG20050405T162921
channel ORA_DISK_1: restore complete
channel ORA_DISK_1: starting datafile backupset restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00011 to /opt/oracle/oradata/eygle/t2k01.dbf
channel ORA_DISK_1: restored backup piece 1
piece handle=/data5/flash_recovery_area/EYGLE/backupset/2005_04_05/o1_mf_nnndf_TAG20050405T162921_154m76kz_.bkp tag=TAG20050405T162921
channel ORA_DISK_1: restore complete
Finished restore at 2005-04-05 16:41:45

Starting recover at 2005-04-05 16:41:46
using channel ORA_DISK_1
datafile 8 not processed because file is offline

starting media recovery

archive log thread 1 sequence 7 is already on disk as file /data5/flash_recovery_area/EYGLE/archivelog/2005_04_05/o1_mf_1_7_154m8z7k_.arc
channel ORA_DISK_1: starting archive log restore to default destination
channel ORA_DISK_1: restoring archive log
archive log thread=1 sequence=6
channel ORA_DISK_1: restored backup piece 1
piece handle=/data5/flash_recovery_area/EYGLE/backupset/2005_04_05/o1_mf_annnn_TAG20050405T163142_154m7jpo_.bkp tag=TAG20050405T163142
channel ORA_DISK_1: restore complete
archive log filename=/data5/flash_recovery_area/EYGLE/archivelog/2005_04_05/o1_mf_1_6_154mtkfk_.arc thread=1 sequence=6
channel default: deleting archive log(s)
archive log filename=/data5/flash_recovery_area/EYGLE/archivelog/2005_04_05/o1_mf_1_6_154mtkfk_.arc recid=302 stamp=554834513
archive log filename=/data5/flash_recovery_area/EYGLE/archivelog/2005_04_05/o1_mf_1_7_154m8z7k_.arc thread=1 sequence=7
media recovery complete
Finished recover at 2005-04-05 16:41:57

RMAN> alter database open resetlogs;

database opened

RMAN> exit


Recovery Manager complete.

4.此时的数据库状态
$ sqlplus "/ as sysdba"

SQL*Plus: Release 10.1.0.2.0 - Production on Tue Apr 5 16:43:58 2005

Copyright (c) 1982, 2004, Oracle.  All rights reserved.


Connected to:
Oracle Database 10g Enterprise Edition Release 10.1.0.2.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options

SYS AS SYSDBA on 2005-04-05 16:43:58 >archive log list;
Database log mode              Archive Mode
Automatic archival             Enabled
Archive destination            USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence     1
Next log sequence to archive   1
Current log sequence           1
SYS AS SYSDBA on 2005-04-05 16:44:01 >select count(*) from t;

  COUNT(*)
----------
     18956

5.继续进行数据更改
SYS AS SYSDBA on 2005-04-05 16:44:08 >create table tt as select * from dba_users;

Table created.

SYS AS SYSDBA on 2005-04-05 16:45:51 >alter system switch logfile;

System altered.

SYS AS SYSDBA on 2005-04-05 16:45:56 >select count(*) from tt;

  COUNT(*)
----------
        12

SYS AS SYSDBA on 2005-04-05 16:46:01 >insert into tt select * from tt;

12 rows created.

SYS AS SYSDBA on 2005-04-05 16:46:13 >commit;

Commit complete.

SYS AS SYSDBA on 2005-04-05 16:46:16 >alter system switch logfile;

System altered.

此时的日志序列:
SYS AS SYSDBA on 2005-04-05 17:46:19 >select * from v$log_history where recid >1811;

     RECID      STAMP    THREAD#  SEQUENCE# FIRST_CHANGE# FIRST_TIME          NEXT_CHANGE# RESETLOGS_CHANGE# RESETLOGS_TIME
---------- ---------- ---------- ---------- ------------- ------------------- ------------ ----------------- -------------------
      1812  554813757          1          1      10923677 2005-04-05 09:54:53     10925720          10923677 2005-04-05 09:54:53
      1813  554813974          1          2      10925720 2005-04-05 10:55:57     10925827          10923677 2005-04-05 09:54:53
      1814  554823464          1          3      10925827 2005-04-05 10:59:34     10947409          10923677 2005-04-05 09:54:53
      1815  554828646          1          4      10947409 2005-04-05 13:37:44     10950318          10923677 2005-04-05 09:54:53
      1816  554833748          1          5      10950318 2005-04-05 15:04:06     10953123          10923677 2005-04-05 09:54:53
      1817  554833901          1          6      10953123 2005-04-05 16:29:08     10953187          10923677 2005-04-05 09:54:53
      1818  554833950          1          7      10953187 2005-04-05 16:31:41     10953213          10923677 2005-04-05 09:54:53
      1819  554834005          1          8      10953213 2005-04-05 16:32:30     10953633          10923677 2005-04-05 09:54:53
      1820  554834118          1          9      10953633 2005-04-05 16:33:25     10953726          10923677 2005-04-05 09:54:53
      1821  554834756          1          1      10953214 2005-04-05 16:42:34     10953433          10953214 2005-04-05 16:42:34
      1822  554834781          1          2      10953433 2005-04-05 16:45:56     10953445          10953214 2005-04-05 16:42:34

11 rows selected.

SYS AS SYSDBA on 2005-04-05 16:46:21 >shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SYS AS SYSDBA on 2005-04-05 16:47:38 >exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.1.0.2.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
6.再次执行恢复
$ rman target /

Recovery Manager: Release 10.1.0.2.0 - 64bit Production

Copyright (c) 1995, 2004, Oracle.  All rights reserved.

connected to target database (not started)

RMAN> startup mount;

Oracle instance started
database mounted

Total System Global Area     314572800 bytes

Fixed Size                     1301704 bytes
Variable Size                261890872 bytes
Database Buffers              50331648 bytes
Redo Buffers                   1048576 bytes

RMAN> run {
2> restore database;
3> recover database;
4> }

Starting restore at 2005-04-05 16:49:54
using target database controlfile instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=160 devtype=DISK

datafile 8 not processed because file is read-only
channel ORA_DISK_1: starting datafile backupset restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00001 to /opt/oracle/oradata/eygle/system01.dbf
restoring datafile 00002 to /opt/oracle/oradata/eygle/undotbs01.dbf
restoring datafile 00003 to /opt/oracle/oradata/eygle/sysaux01.dbf
restoring datafile 00006 to /opt/oracle/oradata/eygle/EYGLE/datafile/o1_mf_test_03xv34ny_.dbf
restoring datafile 00009 to /data1/oradata/systemfile/bigtbs.dbf
restoring datafile 00010 to /opt/oracle/oradata/eygle/dfmbrc.dbf
channel ORA_DISK_1: restored backup piece 1
piece handle=/data5/flash_recovery_area/EYGLE/backupset/2005_04_05/o1_mf_nnndf_TAG20050405T162921_154m33kf_.bkp tag=TAG20050405T162921
channel ORA_DISK_1: restore complete
channel ORA_DISK_1: starting datafile backupset restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00004 to /opt/oracle/oradata/eygle/users01.dbf
restoring datafile 00005 to /data1/oradata/systemfile/eygle01.dbf
restoring datafile 00007 to /opt/oracle/oradata/eygle/EYGLE/datafile/o1_mf_itpub_03xv5g66_.dbf
channel ORA_DISK_1: restored backup piece 1
piece handle=/data5/flash_recovery_area/EYGLE/backupset/2005_04_05/o1_mf_nnndf_TAG20050405T162921_154m6dxm_.bkp tag=TAG20050405T162921
channel ORA_DISK_1: restore complete
channel ORA_DISK_1: starting datafile backupset restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00011 to /opt/oracle/oradata/eygle/t2k01.dbf
channel ORA_DISK_1: restored backup piece 1
piece handle=/data5/flash_recovery_area/EYGLE/backupset/2005_04_05/o1_mf_nnndf_TAG20050405T162921_154m76kz_.bkp tag=TAG20050405T162921
channel ORA_DISK_1: restore complete
Finished restore at 2005-04-05 16:52:31

Starting recover at 2005-04-05 16:52:32
using channel ORA_DISK_1
datafile 8 not processed because file is offline

starting media recovery

archive log thread 1 sequence 7 is already on disk as file /data5/flash_recovery_area/EYGLE/archivelog/2005_04_05/o1_mf_1_7_154m8z7k_.arc
archive log thread 1 sequence 1 is already on disk as file /data5/flash_recovery_area/EYGLE/archivelog/2005_04_05/o1_mf_1_1_154n24v5_.arc
archive log thread 1 sequence 2 is already on disk as file /data5/flash_recovery_area/EYGLE/archivelog/2005_04_05/o1_mf_1_2_154n2y40_.arc
channel ORA_DISK_1: starting archive log restore to default destination
channel ORA_DISK_1: restoring archive log
archive log thread=1 sequence=6
channel ORA_DISK_1: restored backup piece 1
piece handle=/data5/flash_recovery_area/EYGLE/backupset/2005_04_05/o1_mf_annnn_TAG20050405T163142_154m7jpo_.bkp tag=TAG20050405T163142
channel ORA_DISK_1: restore complete
archive log filename=/data5/flash_recovery_area/EYGLE/archivelog/2005_04_05/o1_mf_1_6_154ngror_.arc thread=1 sequence=6
channel default: deleting archive log(s)
archive log filename=/data5/flash_recovery_area/EYGLE/archivelog/2005_04_05/o1_mf_1_6_154ngror_.arc recid=306 stamp=554835160
archive log filename=/data5/flash_recovery_area/EYGLE/archivelog/2005_04_05/o1_mf_1_7_154m8z7k_.arc thread=1 sequence=7
media recovery complete
Finished recover at 2005-04-05 16:53:04

RMAN> alter database open;

database opened

RMAN> exit


Recovery Manager complete.

7.检查数据恢复情况
注意此次恢复跨越了resetlogs时间点
$ sqlplus "/ as sysdba"

SQL*Plus: Release 10.1.0.2.0 - Production on Tue Apr 5 16:53:56 2005

Copyright (c) 1982, 2004, Oracle.  All rights reserved.


Connected to:
Oracle Database 10g Enterprise Edition Release 10.1.0.2.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options

SYS AS SYSDBA on 2005-04-05 16:53:56 >select count(*) from t;

  COUNT(*)
----------
     18956

SYS AS SYSDBA on 2005-04-05 16:54:01 >select count(*) from tt;

  COUNT(*)
----------
        24

SYS AS SYSDBA on 2005-04-05 16:54:07 >
SYS AS SYSDBA on 2005-04-05 16:54:47 >

数据恢复完成.

历史上的今天...
    >> 2009-04-05文章:
           关于Oracle的Dual表
    >> 2006-04-05文章:
    >> 2004-04-05文章:

无觅

By eygle on 2005-04-05 17:20 | Comments (3) | Backup&Recovery | 243 |

3 Comments

你最后作的是一次完全恢复?那么同样也可以作不完全恢复吗?比如resetlogs之后还想恢复到2005-04-05 16:31:41这个时间点也是可以的吗?
可以认为在oracle10g中resetlogs以后根本无需再次进行备份了?那么是无论多少次resetlogs都可以恢复吗?

1.是的最后一次做的是完全恢复,当然也可以作不完全恢复
2.仍然可以恢复到2005-04-05 16:31:41这个时间点
3.如果想恢复到2005-04-05 16:32:30,也是可以的
但是需要之前备份的控制文件,使用目前的控制文件就无法恢复到2005-04-05 16:32:30
4.理论上resetlogs无需立即备份,但是考虑到恢复时间等,还是应该在适当时间间隔进行备份

请问如下情况:
在resetlogs时间点之后丢失了只读表空间的数据,用resetlogs时间点之前的备份来恢复,由于只读表空间的数据文件无法和当前控制文件同步,导致ora-01190错误,此时应该怎么才是正确的?


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