文章詳情頁

Oracle 10g跨越Resetlogs時間點進行恢復

瀏覽：247日期：2023-11-28 11:35:22

在Oracle數據庫10g以前，假如用戶對數據庫進行了不完全恢復，在使用resetlogs選項打開數據庫后，Oracle會提示你需要立即進行全備份。

原因：日志序號會被置位，以此防止后續日志被應用。resetlogs之前的備份將不能用于進行跨域resetlogs時間點的恢復。

在Oracle數據庫10g中，Oracle允許跨越resetlogs時間點進行完全/不完全恢復。

本文將針對此特性介紹一個詳細的參考示例:

一、全備份數據庫

$ rman target /

Recovery Manager: Release 10.1.0.2.0 - 64bit Production

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.

二、進行數據的更改

$ sqlplus '/ as sysdba'

SQL*Plus: Release 10.1.0.2.0 - Production on

Tue Apr 5 16:32:23 2005

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.

日志序列的情況如下:

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.

關閉數據庫:

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

三、執行不完全恢復

$ rman target /

Recovery Manager: Release 10.1.0.2.0 - 64bit Production

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.

四、此時的數據庫狀態

$ sqlplus '/ as sysdba'

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

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

五、繼續進行數據更改

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(*)

----------

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.

此時的日志序列:

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