标签归档：删除日志恢复

在oracle 23ai的pdb中创建用户和表,并且插入数据(不提交),在另外一个会话中abort库,并从os层面rm删除掉redo文件,模拟数据库当前redo丢失,数据库恢复
创建用户和表并插入数据

[oracle@xifenfei ~]$ sqlplus sys/oracle@free as sysdba

SQL*Plus: Release 23.0.0.0.0 - Production on Fri May 3 15:40:55 2024
Version 23.4.0.24.05

Copyright (c) 1982, 2024, Oracle.  All rights reserved.


Connected to:
Oracle Database 23ai Free Release 23.0.0.0.0 - Develop, Learn, and Run for Free
Version 23.4.0.24.05

SQL> 
SQL> 
SQL> show pdbs;

    CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
         2 PDB$SEED                       READ ONLY  NO
         3 FREEPDB1                       READ WRITE NO

SQL> alter session set container=FREEPDB1;

Session altered.

SQL> create user xff identified by oracle;

User created.

SQL> grant dba to xff ;

Grant succeeded.

SQL> conn xff/oracle@FREEPDB1
Connected.
SQL> create table t1 as select * from dba_objects;

Table created.


SQL> insert into t1 select *from t1;

75877 rows created.

SQL> /

151754 rows created.

另外一个会话中abort库

[oracle@xifenfei ~]$ sqlplus sys/oracle@free as sysdba

SQL*Plus: Release 23.0.0.0.0 - Production on Fri May 3 15:43:30 2024
Version 23.4.0.24.05

Copyright (c) 1982, 2024, Oracle.  All rights reserved.


Connected to:
Oracle Database 23ai Free Release 23.0.0.0.0 - Develop, Learn, and Run for Free
Version 23.4.0.24.05

SQL> shutdown abort;
ORACLE instance shut down.
SQL> 
SQL> 
SQL> 
SQL> exit
Disconnected from Oracle Database 23ai Free Release 23.0.0.0.0 - Develop, Learn, and Run for Free
Version 23.4.0.24.05

操作系统层面rm -rf 删除redo

[oracle@xifenfei ~]$ cd $ORACLE_BASE/oradata
[oracle@xifenfei oradata]$ ls
FREE
[oracle@xifenfei oradata]$ cd FREE/
[oracle@192 FREE]$ ls
control01.ctl  FREEPDB1  redo01.log  redo03.log    system01.dbf  undotbs2.dbf
control02.ctl  pdbseed   redo02.log  sysaux01.dbf  temp01.dbf    users01.dbf
[oracle@xifenfei FREE]$ ls -ltr
total 2441036
drwxr-x---. 2 oracle     1000         85 May  1 16:49 pdbseed
-rw-r-----. 1 oracle oinstall   20979712 May  1 16:51 temp01.dbf
drwxr-x---. 2 oracle     1000        104 May  1 16:55 FREEPDB1
-rw-r-----. 1 oracle oinstall  209715712 May  3 15:23 redo01.log
-rw-r-----. 1 oracle oinstall  209715712 May  3 15:23 redo02.log
-rw-r-----. 1 oracle oinstall    7348224 May  3 15:23 users01.dbf
-rw-r-----. 1 oracle oinstall 1080041472 May  3 15:43 system01.dbf
-rw-r-----. 1 oracle oinstall  692068352 May  3 15:43 sysaux01.dbf
-rw-rw----. 1 oracle oinstall   52436992 May  3 15:43 undotbs2.dbf
-rw-r-----. 1 oracle oinstall  209715712 May  3 15:43 redo03.log
-rw-r-----. 1 oracle oinstall   18759680 May  3 15:43 control01.ctl
-rw-r-----. 1 oracle oinstall   18759680 May  3 15:43 control02.ctl
[oracle@xifenfei FREE]$ rm -rf redo0*
[oracle@192 FREE]$ ls -l redo*
ls: cannot access 'redo*': No such file or directory
[oracle@xifenfei FREE]$ 

尝试启动数据库，报ora-00313，ora-00312，ora-27037等错误

[oracle@xifenfei ~]$ sqlplus sys/oracle@free as sysdba

SQL*Plus: Release 23.0.0.0.0 - Production on Fri May 3 15:44:17 2024
Version 23.4.0.24.05

Copyright (c) 1982, 2024, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup mount;
ORACLE instance started.

Total System Global Area 1603726344 bytes
Fixed Size                  5360648 bytes
Variable Size             671088640 bytes
Database Buffers          922746880 bytes
Redo Buffers                4530176 bytes
Database mounted.
SQL> recover database;
ORA-00283: recovery session canceled due to errors
ORA-00313: open failed for members of log group 3 of thread 1
ORA-00312: online log 3 thread 1: '/opt/oracle/oradata/FREE/redo03.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 7

由于所有redo均被删除(包含当前redo),因此只能强制resetlogs方式打开库,尝试打开数据库

SQL> shutdown immediate;
ORA-01109: database not open

Database dismounted.
ORACLE instance shut down.
SQL> startup mount pfile='/tmp/pfile'
ORACLE instance started.

Total System Global Area 1603726344 bytes
Fixed Size                  5360648 bytes
Variable Size             671088640 bytes
Database Buffers          922746880 bytes
Redo Buffers                4530176 bytes
Database mounted.
SQL> recover database until cancel;
ORA-00279: change 4244588 generated at 05/03/2024 15:23:22 needed for thread 1
ORA-00289: suggestion :
/opt/oracle/product/23ai/dbhomeFree/dbs/arch1_6_1167842962.dbf
ORA-00280: change 4244588 for thread 1 is in sequence #6


Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
cancel
ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: '/opt/oracle/oradata/FREE/system01.dbf'


ORA-01112: media recovery not started

SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-00603: ORACLE server session terminated by irrecoverable error
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00600: internal error code, arguments: [kcbzib_kcrsds_1], [], [], [], [],
[], [], [], [], [], [], []
Process ID: 5596
Session ID: 29 Serial number: 63204

数据库遇到常见的ORA-600 kcbzib_kcrsds_1错误,这类错误类似oracle在12c之前版本中的ORA-600 2662错误
ORA-600 kcbzib_kcrsds_1报错
存储故障,强制拉库报ORA-600 kcbzib_kcrsds_1处理
redo异常强制拉库报ORA-600 kcbzib_kcrsds_1修复
ORA-00603 ORA-01092 ORA-600 kcbzib_kcrsds_1
这种一般就是scn问题,通过修改数据库scn,数据库启动报ORA-16433错误

[oracle@xifenfei ~]$ sqlplus sys/oracle@free as sysdba

SQL*Plus: Release 23.0.0.0.0 - Production on Fri May 3 15:49:00 2024
Version 23.4.0.24.05

Copyright (c) 1982, 2024, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup nomount pfile='/tmp/pfile';
ORACLE instance started.

Total System Global Area 1603726344 bytes
Fixed Size                  5360648 bytes
Variable Size             671088640 bytes
Database Buffers          922746880 bytes
Redo Buffers                4530176 bytes
SQL> alter database mount;

Database altered.

SQL> recover database;
ORA-00283: recovery session canceled due to errors
ORA-16433: The database or pluggable database must be opened in read/write mode.


SQL> shutdown abort;
ORACLE instance shut down.

处理ctl,open数据库成功

SQL> startup nomount pfile='/tmp/pfile'
ORACLE instance started.

Total System Global Area 1603726344 bytes
Fixed Size                  5360648 bytes
Variable Size             671088640 bytes
Database Buffers          922746880 bytes
Redo Buffers                4530176 bytes
SQL> CREATE CONTROLFILE REUSE DATABASE "FREE" NORESETLOGS  NOARCHIVELOG
  2      MAXLOGFILES 16
  3      MAXLOGMEMBERS 3
  4      MAXDATAFILES 1024
  5      MAXINSTANCES 8
  6      MAXLOGHISTORY 292
  7  LOGFILE
  8    GROUP 1 '/opt/oracle/oradata/FREE/redo01.log'  SIZE 200M BLOCKSIZE 512,
  9    GROUP 2 '/opt/oracle/oradata/FREE/redo02.log'  SIZE 200M BLOCKSIZE 512,
 10    GROUP 3 '/opt/oracle/oradata/FREE/redo03.log'  SIZE 200M BLOCKSIZE 512
 11  -- STANDBY LOGFILE
 12  DATAFILE
 13    '/opt/oracle/oradata/FREE/system01.dbf',
 14    '/opt/oracle/oradata/FREE/pdbseed/system01.dbf',
 15    '/opt/oracle/oradata/FREE/sysaux01.dbf',
 16    '/opt/oracle/oradata/FREE/pdbseed/sysaux01.dbf',
 17    '/opt/oracle/oradata/FREE/users01.dbf',
 18    '/opt/oracle/oradata/FREE/pdbseed/undotbs01.dbf',
 19    '/opt/oracle/oradata/FREE/FREEPDB1/system01.dbf',
 20    '/opt/oracle/oradata/FREE/FREEPDB1/sysaux01.dbf',
 21    '/opt/oracle/oradata/FREE/FREEPDB1/undotbs01.dbf',
 22    '/opt/oracle/oradata/FREE/FREEPDB1/users01.dbf',
 23    '/opt/oracle/oradata/FREE/undotbs2.dbf'
 24  CHARACTER SET AL32UTF8
 25  ;

Control file created.

SQL> recover database;
Media recovery complete.
SQL> alter database open;

Database altered.

SQL> show pdbs;

          CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------------- ------------------------------ ---------- ----------
               2 PDB$SEED                       READ ONLY  NO
               3 FREEPDB1                       READ WRITE NO

至此当前数据库redo故障模拟和恢复基本完成