数据库|mysql教程
RMAN,rman 恢复—归档丢失and数据文件损坏,数
数据库-mysql教程
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在归档日志有丢失的情况下并且数据文件损坏，恢复数据库。 用rman恢复，归档有丢失，恢复到指定的sequence1、在数据库open的情况
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在归档日志有丢失的情况下并且数据文件损坏，，恢复数据库。
用rman恢复，归档有丢失，恢复到指定的sequence
1、在数据库open的情况下，做一些操作，确定这些操作所在的归档日志文件
SQL> select group#,sequence#,members,status from v$log;
GROUP# SEQUENCE# MEMBERS STATUS
———- ———- ———- —————-
1 101 ACTIVE
2 111 CURRENT
391 ACTIVE
SQL> show user;
USER is “HAOZG”
SQL> create table test11(name varchar2(10),age number);
Table created.
SQL> insert into test11 values(‘haozg’,28);
1 row created.
SQL> commit;
Commit complete.
SQL> /
Commit complete.
SQL> insert into test11 values(‘zhangf’,29);
1 row created.
SQL> commit;
Commit complete.
SQL> alter system switch logfile;
System altered.
SQL> select group#,sequence#,members,status from v$log;
GROUP# SEQUENCE# MEMBERS STATUS
———- ———- ———- —————-
1 101 ACTIVE
2 111 ACTIVE
3 121 CURRENT
上面做的操作保存在sequence是11的归档日志文件中。
2、做全库备份
RMAN> run{
allocate channel c1 type disk maxpiecesize=500m;
backup current controlfile format ‘+dgasm/backup/haozg/ctl_%d_%s’;
backup full database format ‘+dgasm/backup/haozg/db_%d_%s_%p_%t’;
sql ‘alter system archive log current’;
release channel c1;
}2> 3> 4> 5> 6> 7>
using target database control file instead of recovery catalog
allocated channel: c1
channel c1: SID=44 device type=DISK
Starting backup at 01-JUL-12
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
including current control file in backup set
channel c1: starting piece 1 at 01-JUL-12
channel c1: finished piece 1 at 01-JUL-12
piece handle=+DGASM/backup/haozg/ctl_ora11_41 tag=TAG0701T101120 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:03
Finished backup at 01-JUL-12
Starting backup at 01-JUL-12
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
input datafile file number=00001 name=+DGASM/ora11/datafile/system.257.785186755
input datafile file number=00002 name=+DGASM/ora11/datafile/sysaux.258.785186845
input datafile file number=00003 name=+DGASM/ora11/datafile/undotbs1.259.785186901
input datafile file number=00004 name=+DGASM/ora11/datafile/users.272.787470817
channel c1: starting piece 1 at 01-JUL-12
channel c1: finished piece 1 at 01-JUL-12
piece handle=+DGASM/backup/haozg/db_ora11_42_1_787486286 tag=TAG0701T101126 comment=NONE
channel c1: starting piece 2 at 01-JUL-12
channel c1: finished piece 2 at 01-JUL-12
piece handle=+DGASM/backup/haozg/db_ora11_42_2_787486286 tag=TAG0701T101126 comment=NONE
channel c1: backup set complete, elapsed time: 00:02:00
channel c1: starting full datafile backup set
channel c1: specifying datafile(s) in backup set
including current control file in backup set
including current SPFILE in backup set
channel c1: starting piece 1 at 01-JUL-12
channel c1: finished piece 1 at 01-JUL-12
piece handle=+DGASM/backup/haozg/db_ora11_43_1_787486406 tag=TAG0701T101126 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:01
Finished backup at 01-JUL-12
sql statement: alter system archive log current
released channel: c1
RMAN>
3、然再做操作，确定所在的归档文件
SQL> select group#,sequence#,members,status from v$log;
GROUP# SEQUENCE# MEMBERS STATUS
———- ———- ———- —————-
1 131 CURRENT
2 111 INACTIVE
3 121 ACTIVE
SQL> create table test22(name varchar2(10),age number);
Table created.
SQL> insert into test22 values(‘guany’,30);
1 row created.
SQL> commit;
Commit complete.
SQL> alter system switch logfile;
System altered.
SQL> select group#,sequence#,members,status from v$log;
GROUP# SEQUENCE# MEMBERS STATUS
———- ———- ———- —————-
1 131 ACTIVE
2 141 CURRENT
3 121 ACTIVE
SQL> alter system switch logfile;
System altered.
SQL> /
System altered.
SQL> select group#,sequence#,members,status from v$log;
GROUP# SEQUENCE# MEMBERS STATUS
———- ———- ———- —————-
1 161 CURRENT
2 141 ACTIVE
3 151 ACTIVE
上面的操作在sequence是13 的归档日志文件中
4、到数据库的归档目录下删除sequence 是13的归档日志文件
[Oracle@ archivelog]$ ls -al
total 9904
drwxr-xr-x 2 oracle oinstall4096 Jul 1 10:16 .
drwxrwxr-x 12 oracle oinstall4096 Jun 18 17:04 ..
-rw-r—– 1 oracle oinstall2560 Jul 1 10:03 1_10_787471195.dbf
-rw-r—– 1 oracle oinstall 20992 Jul 1 10:08 1_11_787471195.dbf
-rw-r—– 1 oracle oinstall 10061312 Jul 1 10:13 1_12_787471195.dbf
-rw-r—– 1 oracle oinstall 18944 Jul 1 10:16 1_13_787471195.dbf
-rw-r—– 1 oracle oinstall2560 Jul 1 10:03 1_9_787471195.dbf
[oracle@ archivelog]$ mv 1_13_787471195.dbf ../
[oracle@ archivelog]$ ls
1_10_787471195.dbf 1_11_787471195.dbf 1_12_787471195.dbf 1_9_787471195.dbf
[oracle@ archivelog]$ ls -al
total 10168
drwxr-xr-x 2 oracle oinstall4096 Jul 1 10:20 .
drwxrwxr-x 12 oracle oinstall4096 Jul 1 10:19 ..
-rw-r—– 1 oracle oinstall2560 Jul 1 10:03 1_10_787471195.dbf
-rw-r—– 1 oracle oinstall 20992 Jul 1 10:08 1_11_787471195.dbf
-rw-r—– 1 oracle oinstall 10061312 Jul 1 10:13 1_12_787471195.dbf
-rw-r—– 1 oracle oinstall 282624 Jul 1 10:20 1_14_787471195.dbf
-rw-r—– 1 oracle oinstall3072 Jul 1 10:20 1_15_787471195.dbf
-rw-r—– 1 oracle oinstall2560 Jul 1 10:03 1_9_787471195.dbf
