2008年（22）
分类： Oracle
2008-05-16 16:28:58
(21) 将表空间设置为备份状态, 然后向其中的表内插入数据
SQL> alter tablespace users begin backup;
Tablespace altered.
SQL> insert into test2 values(100,'100');
1 row created.
SQL> select * from test2;
ID NAME
---------- ----------
1 sss
3 333
1 222
100 100
4 1111
(22) 使用abort方式关闭数据库, 100这条记录又没有了啊
SQL> shutdown abort;
ORACLE instance shut down.
(23) 备份redo日志后, 删掉所有的redo日志
[oracle@oracle-svr 10.2.0]$ cd oradata/
[oracle@oracle-svr oradata]$ cd demo1
[oracle@oracle-svr demo1]$ ls
control01.ctl redo01.log system01.dbf testtb2.dbf
control02.ctl redo02.log temp01.dbf testtb.dbf
control03.ctl redo03.log testdb2.dbf undotbs01.dbf
example01.dbf sysaux01.dbf testtb1.dbf users01.dbf
[oracle@oracle-svr demo1]$ cp redo0*.log ../arclog/
[oracle@oracle-svr demo1]$ ls
control01.ctl redo01.log system01.dbf testtb2.dbf
control02.ctl redo02.log temp01.dbf testtb.dbf
control03.ctl redo03.log testdb2.dbf undotbs01.dbf
example01.dbf sysaux01.dbf testtb1.dbf users01.dbf
[oracle@oracle-svr demo1]$ rm redo*.log
[oracle@oracle-svr oradata]$ cd demo1/
[oracle@oracle-svr demo1]$ ls
control01.ctl example01.dbf temp01.dbf testtb2.dbf users01.dbf
control02.ctl sysaux01.dbf testdb2.dbf testtb.dbf
control03.ctl system01.dbf testtb1.dbf undotbs01.dbf
(24) 启动数据库, 提示需要介质恢复
[oracle@oracle-svr bin]$ ./sqlplus /nolog;
SQL*Plus: Release 10.2.0.1.0 - Production on Wed Aug 22 13:50:43 2007
Copyright (c) 1982, 2005, Oracle. All rights reserved.
SQL> conn sys/a as sysdba
Connected to an idle instance.
SQL> startup
ORACLE instance started.
Total System Global Area 285212672 bytes
Fixed Size 1218992 bytes
Variable Size 113247824 bytes
Database Buffers 167772160 bytes
Redo Buffers 2973696 bytes
Database mounted.
ORA-01113: file 4 needs media recovery
ORA-01110: data file 4:
'/u01/app/oracle/product/10.2.0/oradata/demo1/users01.dbf'
(25) 将备份的redo文件恢复, 启动数据库, 通过redo文件恢复. 100这条记录果真没有了.
[oracle@oracle-svr oradata]$ cd demo1/
[oracle@oracle-svr demo1]$ ls
control01.ctl example01.dbf temp01.dbf testtb2.dbf users01.dbf
control02.ctl sysaux01.dbf testdb2.dbf testtb.dbf
control03.ctl system01.dbf testtb1.dbf undotbs01.dbf
[oracle@oracle-svr demo1]$ cd ..
[oracle@oracle-svr oradata]$ cd arclog/
[oracle@oracle-svr arclog]$ ls
control01.ctl redo01.log system01.dbf testtb2.dbf
control02.ctl redo02.log temp01.dbf testtb.dbf
control03.ctl redo03.log testdb2.dbf undotbs01.dbf
example01.dbf sysaux01.dbf testtb1.dbf users01.dbf
[oracle@oracle-svr arclog]$ cp redo*.log ../demo1/
[oracle@oracle-svr arclog]$ ls
control01.ctl redo01.log system01.dbf testtb2.dbf
control02.ctl redo02.log temp01.dbf testtb.dbf
control03.ctl redo03.log testdb2.dbf undotbs01.dbf
example01.dbf sysaux01.dbf testtb1.dbf users01.dbf
SQL> recover database
Media recovery complete.
SQL> alter database open;
Database altered.
SQL> select * from test2
2 ;
ID NAME
---------- ----------
1 sss
3 333
1 222
4 1111
(26) 先end backup表空间. 正常关闭数据库
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
(27) 将redo文件移动到备份目录
[oracle@oracle-svr demo1]$ mv redo*.log ../arclog/
[oracle@oracle-svr demo1]$ ls
control01.ctl example01.dbf temp01.dbf testtb2.dbf users01.dbf
control02.ctl sysaux01.dbf testdb2.dbf testtb.dbf
control03.ctl system01.dbf testtb1.dbf undotbs01.dbf
[oracle@oracle-svr demo1]$ ls ../arclog/
control01.ctl redo01.log system01.dbf testtb2.dbf
control02.ctl redo02.log temp01.dbf testtb.dbf
control03.ctl redo03.log testdb2.dbf undotbs01.dbf
example01.dbf sysaux01.dbf testtb1.dbf users01.dbf
[oracle@oracle-svr demo1]$ ls
control01.ctl example01.dbf temp01.dbf testtb2.dbf users01.dbf
control02.ctl sysaux01.dbf testdb2.dbf testtb.dbf
control03.ctl system01.dbf testtb1.dbf undotbs01.dbf
(28) 启动数据库, 提示redo日志打开错误
SQL> startup
ORACLE instance started.
Total System Global Area 285212672 bytes
Fixed Size 1218992 bytes
Variable Size 113247824 bytes
Database Buffers 167772160 bytes
Redo Buffers 2973696 bytes
Database mounted.
ORA-00313: open failed for members of log group 1 of thread 1
ORA-00312: online log 1 thread 1:
'/u01/app/oracle/product/10.2.0/oradata/demo1/redo01.log'
(29) 通过归档日志恢复后, 错误的使用了noresetlogs打开数据库, 没有成功.
SQL> recover database until cancel
Media recovery complete.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01589: must use RESETLOGS or NORESETLOGS option for database open
SQL> alter database open NORESETLOGS;
alter database open NORESETLOGS
*
ERROR at line 1:
ORA-00313: open failed for members of log group 1 of thread 1
ORA-00312: online log 1 thread 1:
'/u01/app/oracle/product/10.2.0/oradata/demo1/redo01.log'
(30) 恢复redo日志
[oracle@oracle-svr arclog]$ ls
control01.ctl redo01.log system01.dbf testtb2.dbf
control02.ctl redo02.log temp01.dbf testtb.dbf
control03.ctl redo03.log testdb2.dbf undotbs01.dbf
example01.dbf sysaux01.dbf testtb1.dbf users01.dbf
[oracle@oracle-svr arclog]$ cp * ../demo1/
[oracle@oracle-svr arclog]$
(31) 重新启动数据库后, 使用归档日志恢复
SQL> conn sys/1 as sysdba
Connected to an idle instance.
SQL> startup
ORACLE instance started.
Total System Global Area 285212672 bytes
Fixed Size 1218992 bytes
Variable Size 113247824 bytes
Database Buffers 167772160 bytes
Redo Buffers 2973696 bytes
Database mounted.
ORA-00314: log 1 of thread 1, expected sequence# doesn't match
ORA-00312: online log 1 thread 1:
'/u01/app/oracle/product/10.2.0/oradata/demo1/redo01.log'
SQL> recover database until cancel;
Media recovery complete.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01589: must use RESETLOGS or NORESETLOGS option for database open
(32) 通过resetlogs参数打开了数据库, 不过丢了部分的数据.
SQL> alter database open RESETLOGS;
Database altered.
SQL> select * from test2;
ID NAME
---------- ----------
1 sss
3 333
SQL> insert into test2 values (99,'9999');
1 row created.
SQL> select * from test2;
ID NAME
---------- ----------
1 sss
3 333
99 9999
SQL>alter system switch logfile
SQL>alter system switch logfile
SQL>alter system switch logfile
SQL>alter system switch logfile
(33) 再次正常关闭数据库, 并将redo文件移动到备份目录, 再次启动数据库.
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
[oracle@oracle-svr demo1]$ mv redo*.log ../arclog/
[oracle@oracle-svr demo1]$ ls
control01.ctl example01.dbf temp01.dbf testtb2.dbf users01.dbf
control02.ctl sysaux01.dbf testdb2.dbf testtb.dbf
control03.ctl system01.dbf testtb1.dbf undotbs01.dbf
SQL> startup;
ORACLE instance started.
Total System Global Area 285212672 bytes
Fixed Size 1218992 bytes
Variable Size 117442128 bytes
Database Buffers 163577856 bytes
Redo Buffers 2973696 bytes
Database mounted.
ORA-00313: open failed for members of log group 1 of thread 1
ORA-00312: online log 1 thread 1:
'/u01/app/oracle/product/10.2.0/oradata/demo1/redo01.log'
(34) 在前面作了4次switch log file, 因此数据已经完全写入到数据文件中, 所以此时无论通过归档日志还是redo日志, 都没有实际的恢复动作
因为resetlog, 所以redo文件被重置了. 但是数据并没有丢失.
SQL> recover database;
ORA-00283: recovery session canceled due to errors
ORA-00264: no recovery required
SQL> recover database until cancel;
Media recovery complete.
SQL> alter database open resetlogs;
Database altered.
SQL> select * from test2;
ID NAME
---------- ----------
1 sss
3 333
99 9999
(35) RMAN备份数据库, 将所有的数据文件放在piece1备份文件中.
将SPFIL和control file放在piece2备份文件中.
[oracle@oracle-svr demo1]$./rman target sys/password
RMAN> run {
2> allocate channel c1 type disk;
3> backup database;
4> release channel c1;
5> }
using target database control file instead of recovery catalog
allocated channel: c1
channel c1: sid=142 devtype=DISK
Starting backup at 22-AUG-07
channel c1: starting full datafile backupset
channel c1: specifying datafile(s) in backupset
input datafile fno=00001 name=/u01/app/oracle/product/10.2.0/oradata/demo1/system01.dbf
input datafile fno=00003 name=/u01/app/oracle/product/10.2.0/oradata/demo1/sysaux01.dbf
input datafile fno=00005 name=/u01/app/oracle/product/10.2.0/oradata/demo1/example01.dbf
input datafile fno=00002 name=/u01/app/oracle/product/10.2.0/oradata/demo1/undotbs01.dbf
input datafile fno=00006 name=/u01/app/oracle/product/10.2.0/oradata/demo1/testtb.dbf
input datafile fno=00004 name=/u01/app/oracle/product/10.2.0/oradata/demo1/users01.dbf
channel c1: starting piece 1 at 22-AUG-07
channel c1: finished piece 1 at 22-AUG-07
piece handle=/u01/app/oracle/product/10.2.0/db_1/flash_recovery_area/DEMO1/backupset/2007_08_22/o1_mf_nnndf_TAG20070822T150429_3dqqzxof_.bkp tag=TAG20070822T150429 comment=NONE
channel c1: backup set complete, elapsed time: 00:01:15
channel c1: starting full datafile backupset
channel c1: specifying datafile(s) in backupset
including current control file in backupset
including current SPFILE in backupset
channel c1: starting piece 1 at 22-AUG-07
channel c1: finished piece 1 at 22-AUG-07
piece handle=/u01/app/oracle/product/10.2.0/db_1/flash_recovery_area/DEMO1/backupset/2007_08_22/o1_mf_ncsnf_TAG20070822T150429_3dqr2br7_.bkp tag=TAG20070822T150429 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:03
Finished backup at 22-AUG-07
released channel: c1
(36) 删除所有的数据库文件, 但是保留控制文件, 然后将数据库mount上, 此时无法open
SQL> startup mount
ORACLE instance started.
Total System Global Area 285212672 bytes
Fixed Size 1218992 bytes
Variable Size 125830736 bytes
Database Buffers 155189248 bytes
Redo Buffers 2973696 bytes
Database mounted.
(37) 恢复数据库. 注意这次恢复的不是利用上面的那次备份. 中间我又备份了一次(两个channel同时,分别写到硬盘的不同位置), 但是没有记录.
注意1,4,6在一个backupset中, 2, 3, 5在另外一个backupset中
RMAN> run {
2> allocate channel c1 type disk;
3> restore b database;
4> release channel c1;
5> }
using target database control file instead of recovery catalog
allocated channel: c2
channel c2: sid=155 devtype=DISK
Starting restore at 22-AUG-07
channel c2: starting datafile backupset restore
channel c2: specifying datafile(s) to restore from backup set
restoring datafile 00001 to /u01/app/oracle/product/10.2.0/oradata/demo1/system01.dbf
restoring datafile 00004 to /u01/app/oracle/product/10.2.0/oradata/demo1/users01.dbf
restoring datafile 00006 to /u01/app/oracle/product/10.2.0/oradata/demo1/testtb.dbf
channel c2: reading from backup piece /home/oracle/u01/10iq1ic3_1_1.log
channel c2: restored backup piece 1
piece handle=/home/oracle/u01/10iq1ic3_1_1.log tag=TAG20070822T153219
channel c2: restore complete, elapsed time: 00:00:37
channel c2: starting datafile backupset restore
channel c2: specifying datafile(s) to restore from backup set
restoring datafile 00002 to /u01/app/oracle/product/10.2.0/oradata/demo1/undotbs01.dbf
restoring datafile 00003 to /u01/app/oracle/product/10.2.0/oradata/demo1/sysaux01.dbf
restoring datafile 00005 to /u01/app/oracle/product/10.2.0/oradata/demo1/example01.dbf
channel c2: reading from backup piece /home/oracle/u02/11iq1ic3_1_1.log
channel c2: restored backup piece 1
piece handle=/home/oracle/u02/11iq1ic3_1_1.log tag=TAG20070822T153219
channel c2: restore complete, elapsed time: 00:00:25
Finished restore at 22-AUG-07
released channel: c2
RMAN> exit
(38) 恢复完成后, 检查scn的4个参数. 发现v$datafile_header和v$datafile中的不同, 这是因为控制文件是最新的, 但是恢复的数据库文件稍微旧一些.
SQL> select FILE#, CHECKPOINT_CHANGE#,LAST_CHANGE# from v$datafile;
FILE# CHECKPOINT_CHANGE# LAST_CHANGE#
---------- ------------------ ------------
1 657172 657172
2 657172 657172
3 657172 657172
4 657172 657172
5 657172 657172
6 657172 657172
6 rows selected.
SQL> select NAME ,CHECKPOINT_CHANGE# from v$database;
NAME CHECKPOINT_CHANGE#
------------------ ------------------
DEMO1 657172
SQL> select FILE#,CHECKPOINT_CHANGE# from v$datafile_header;
FILE# CHECKPOINT_CHANGE#
---------- ------------------
1 656843
2 0
3 0
4 656843
5 0
6 656843
6 rows selected.
(39) 通过归档日志恢复(其实不用做这一步, 看下面什么也没有做成)
SQL> recover database until cancel
ORA-00279: change 656843 generated at 08/22/2007 15:32:19 needed for thread 1
ORA-00289: suggestion :
/u01/app/oracle/product/10.2.0/db_1/flash_recovery_area/DEMO1/archivelog/2007_0
_22/o1_mf_1_2_%u_.arc
ORA-00280: change 656843 for thread 1 is in sequence #2
Specify log: {=suggested | filename | AUTO | CANCEL}
auto
ORA-00308: cannot open archived log
'/u01/app/oracle/product/10.2.0/db_1/flash_recovery_area/DEMO1/archivelog/2007_
8_22/o1_mf_1_2_%u_.arc'
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3
ORA-00308: cannot open archived log
'/u01/app/oracle/product/10.2.0/db_1/flash_recovery_area/DEMO1/archivelog/2007_
8_22/o1_mf_1_2_%u_.arc'
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3
(40) 直接打开数据库出错, 因为redo文件被删掉了. resetlogs方式可以打开数据库, 数据没有丢失.
不能确认使用rman的数据库备份, 在恢复时是否一定不需要redo文件
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01589: must use RESETLOGS or NORESETLOGS option for database open
SQL> alter database open resetlogs;
Database altered.
SQL> select * from test2;
ID NAME
---------- ----------
1 sss
3 333
99 9999
SQL> select * from test1;
ID NAME
---------- --------------------
1 aaa
10 100
20 2020
1 111
1 ..
(41) 再次删除所有的数据库文件和redo文件, 但是保留控制文件. 然后通过备份恢复(此次是使用同一个piece文件恢复所有的数据库)
RMAN> run {
2> allocate channel c2 type disk;
3> restore database;
4> release channel c2;
5> }
using target database control file instead of recovery catalog
allocated channel: c2
channel c2: sid=155 devtype=DISK
Starting restore at 22-AUG-07
channel c2: starting datafile backupset restore
channel c2: specifying datafile(s) to restore from backup set
restoring datafile 00001 to /u01/app/oracle/product/10.2.0/oradata/demo1/system01.dbf
restoring datafile 00004 to /u01/app/oracle/product/10.2.0/oradata/demo1/users01.dbf
restoring datafile 00006 to /u01/app/oracle/product/10.2.0/oradata/demo1/testtb.dbf
channel c2: reading from backup piece /home/oracle/u01/10iq1ic3_1_1.log
ORA-19870: error reading backup piece /home/oracle/u01/10iq1ic3_1_1.log
ORA-19505: failed to identify file "/home/oracle/u01/10iq1ic3_1_1.log"
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3
channel c2: starting datafile backupset restore
channel c2: specifying datafile(s) to restore from backup set
restoring datafile 00002 to /u01/app/oracle/product/10.2.0/oradata/demo1/undotbs01.dbf
restoring datafile 00003 to /u01/app/oracle/product/10.2.0/oradata/demo1/sysaux01.dbf
restoring datafile 00005 to /u01/app/oracle/product/10.2.0/oradata/demo1/example01.dbf
channel c2: reading from backup piece /home/oracle/u02/11iq1ic3_1_1.log
ORA-19870: error reading backup piece /home/oracle/u02/11iq1ic3_1_1.log
ORA-19505: failed to identify file "/home/oracle/u02/11iq1ic3_1_1.log"
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3
failover to previous backup
channel c2: starting datafile backupset restore
channel c2: specifying datafile(s) to restore from backup set
restoring datafile 00001 to /u01/app/oracle/product/10.2.0/oradata/demo1/system01.dbf
restoring datafile 00002 to /u01/app/oracle/product/10.2.0/oradata/demo1/undotbs01.dbf
restoring datafile 00003 to /u01/app/oracle/product/10.2.0/oradata/demo1/sysaux01.dbf
restoring datafile 00004 to /u01/app/oracle/product/10.2.0/oradata/demo1/users01.dbf
restoring datafile 00005 to /u01/app/oracle/product/10.2.0/oradata/demo1/example01.dbf
restoring datafile 00006 to /u01/app/oracle/product/10.2.0/oradata/demo1/testtb.dbf
channel c2: reading from backup piece /u01/app/oracle/product/10.2.0/db_1/flash_recovery_area/DEMO1/backupset/2007_08_22/o1_mf_nnndf_TAG20070822T152827_3dqsdvxo_.bkp
channel c2: restored backup piece 1
piece handle=/u01/app/oracle/product/10.2.0/db_1/flash_recovery_area/DEMO1/backupset/2007_08_22/o1_mf_nnndf_TAG20070822T152827_3dqsdvxo_.bkp tag=TAG20070822T152827
channel c2: restore complete, elapsed time: 00:00:56
Finished restore at 22-AUG-07
released channel: c2
RMAN> exit
[oracle@oracle-svr bin]$ ls ../../oradata/demo1/
control01.ctl control03.ctl sysaux01.dbf testtb.dbf users01.dbf
control02.ctl example01.dbf system01.dbf undotbs01.dbf
(42) 启动数据库到mount状态
[oracle@oracle-svr bin]$ ./sqlplus /nolog
SQL*Plus: Release 10.2.0.1.0 - Production on Wed Aug 22 16:02:05 2007
Copyright (c) 1982, 2005, Oracle. All rights reserved.
SQL> conn sys/1 as sysdba
Connected.
SQL> startup mount
ORA-01081: cannot start already-running ORACLE - shut it down first
SQL> shutdown abort
ORACLE instance shut down.
SQL> startup mount
ORACLE instance started.
Total System Global Area 285212672 bytes
Fixed Size 1218992 bytes
Variable Size 130025040 bytes
Database Buffers 150994944 bytes
Redo Buffers 2973696 bytes
Database mounted.
SQL> select FILE#, CHECKPOINT_CHANGE#,LAST_CHANGE# from v$datafile;
FILE# CHECKPOINT_CHANGE# LAST_CHANGE#
---------- ------------------ ------------
1 657172 657172
2 657172 657172
3 657172 657172
4 657172 657172
5 657172 657172
6 657172 657172
6 rows selected.
SQL> select NAME ,CHECKPOINT_CHANGE# from v$database;
NAME CHECKPOINT_CHANGE#
------------------ ------------------
DEMO1 657172
SQL> select FILE#,CHECKPOINT_CHANGE# from v$datafile_header;
FILE# CHECKPOINT_CHANGE#
---------- ------------------
1 656716
2 656716
3 656716
4 656716
5 656716
6 656716
6 rows selected.
(43) 再次进行不必要的通过归档日志的恢复.
SQL> recover database until cancel
ORA-00279: change 656716 generated at 08/22/2007 15:28:27 needed for thread 1
ORA-00289: suggestion :
/u01/app/oracle/product/10.2.0/db_1/flash_recovery_area/DEMO1/archivelog/2007_08
_22/o1_mf_1_2_%u_.arc
ORA-00280: change 656716 for thread 1 is in sequence #2
Specify log: {=suggested | filename | AUTO | CANCEL}
ORA-00308: cannot open archived log
'/u01/app/oracle/product/10.2.0/db_1/flash_recovery_area/DEMO1/archivelog/2007_0
8_22/o1_mf_1_2_%u_.arc'
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3
(44) 不用resetlogs参数无法打开数据库. 使用resetlogs可以打开数据库
SQL> alter database open
2 ;
alter database open
*
ERROR at line 1:
ORA-01589: must use RESETLOGS or NORESETLOGS option for database open
SQL> recover database
ORA-00283: recovery session canceled due to errors
ORA-00313: open failed for members of log group 2 of thread 1
ORA-00312: online log 2 thread 1:
'/u01/app/oracle/product/10.2.0/oradata/demo1/redo02.log'
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3
SQL> recover
ORA-00283: recovery session canceled due to errors
ORA-00313: open failed for members of log group 2 of thread 1
ORA-00312: online log 2 thread 1:
'/u01/app/oracle/product/10.2.0/oradata/demo1/redo02.log'
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3
SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
[oracle@oracle-svr bin]$ ls ../../oradata/demo1/
control01.ctl control03.ctl sysaux01.dbf testtb.dbf users01.dbf
control02.ctl example01.dbf system01.dbf undotbs01.dbf
[oracle@oracle-svr bin]$ ./sqlplus /nolog
SQL*Plus: Release 10.2.0.1.0 - Production on Wed Aug 22 16:04:36 2007
Copyright (c) 1982, 2005, Oracle. All rights reserved.
SQL> conn sys/1 as sysdba
Connected.
SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01139: RESETLOGS option only valid after an incomplete database recovery
SQL> recover database until cancel
ORA-00279: change 656716 generated at 08/22/2007 15:28:27 needed for thread 1
ORA-00289: suggestion :
/u01/app/oracle/product/10.2.0/db_1/flash_recovery_area/DEMO1/archivelog/2007_08
_22/o1_mf_1_2_%u_.arc
ORA-00280: change 656716 for thread 1 is in sequence #2
Specify log: {=suggested | filename | AUTO | CANCEL}
ORA-00308: cannot open archived log
'/u01/app/oracle/product/10.2.0/db_1/flash_recovery_area/DEMO1/archivelog/2007_0
8_22/o1_mf_1_2_%u_.arc'
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3
SQL> alter database open resetlogs;
Database altered.
我想下面测试rman的数据库全备份是不是完全部依赖于redo日志和归档日志
我觉得需要归档，但是redo日志可能不用。
确认的方法：备份的数据库文件是否是一致的
