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分类: 服务器与存储

2008-06-16 19:24:55

昨天做一个实验,结果把数据库搞坏了,当试图进行恢复时居然报了RMAN-06026错误。 回想一下,原来在尝试恢复中使用了_allow_resetlogs_corruption参数,resetlogs之后,Oracle使用当前的控制文件不允许从这个历史备份集中进行恢复。
  
  由于我没有使用catalog,所以尝试使用dbms_backup_restore进行恢复。
  
  1.错误信息
  
  我们看到虽然list backup可以显示备份集,但是无法进行恢复,错误为RMAN-06026,RMAN-06026。
  [@jumper oradata]$ rman target /
  
  Recovery Manager: Release 9.2.0.4.0 - Production
  
  Copyright (c) 1995, 2002, Oracle Corporation. All rights reserved.
  
  connected to target database: CONNER (DBID=3152029224)
  
  RMAN> restore database;
  
  Starting restore at 11-JUN-05
  
  using target database controlfile instead of recovery catalog
  allocated channel: ORA_DISK_1
  channel ORA_DISK_1: sid=11 devtype=DISK
  RMAN-00571: ===========================================================
  RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
  RMAN-00571: ===========================================================
  RMAN-03002: failure of restore command at 06/11/2005 01:19:01
  RMAN-06026: some targets not found - aborting restore
  RMAN-06023: no backup or copy of datafile 3 found to restore
  RMAN-06023: no backup or copy of datafile 2 found to restore
  RMAN-06023: no backup or copy of datafile 1 found to restore
  
  RMAN> list backup;
  
  List of Backup Sets
  ===================
  
  BS Key Type LV Size    Device Type Elapsed Time Completion Time
  ------- ---- -- ---------- ----------- ------------ ---------------
  13   Full  1G     DISK    00:03:20   09-JUN-05
      BP Key: 13  Status: AVAILABLE  Tag: TAG20050609T173346
      Piece Name: /opt//product/9.2.0/dbs/0ggmiabq_1_1
   SPFILE Included: Modification time: 08-JUN-05
   List of Datafiles in backup set 13
   File LV Type Ckp SCN  Ckp Time Name
   ---- -- ---- ---------- --------- ----
   1    Full 240560269 09-JUN-05 /opt//oradata/conner/system01.dbf
   2    Full 240560269 09-JUN-05 /opt//oradata/conner/undotbs01.dbf
   3    Full 240560269 09-JUN-05 /opt//oradata/conner/users01.dbf
  
  RMAN> exit
  
  Recovery Manager complete.
  
  2.使用dbms_backup_restore进行恢复
  
  dbms_backup_restore是一个非常强大的package,可以在数据库nomount下使用,用于从备份集中读取各类文件。
  
  本例使用如下脚本:
  DECLARE
   devtype varchar2(256);
   done boolean;
   BEGIN
   devtype:=sys.dbms_backup_restore.deviceAllocate (type=>'',ident=>'t1');
   sys.dbms_backup_restore.restoreSetDatafile;
   sys.dbms_backup_restore.restoreDatafileTo(dfnumber=>01,toname=>'/opt//oradata/conner/system01.dbf');
   sys.dbms_backup_restore.restoreDatafileTo(dfnumber=>02,toname=>'/opt//oradata/conner/undotbs01.dbf');
   sys.dbms_backup_restore.restoreDatafileTo(dfnumber=>03,toname=>'/opt//oradata/conner/users01.dbf');
   sys.dbms_backup_restore.restoreBackupPiece(done=>done,handle=>'/opt//product/9.2.0/dbs/0ggmiabq_1_1', params=>null);
   sys.dbms_backup_restore.deviceDeallocate;
  END;
  /
  
  3.执行恢复
  
  [@jumper conner]$ sqlplus "/ as sysdba"
  
  SQL*Plus: Release 9.2.0.4.0 - Production on Sat Jun 11 01:24:34 2005
  
  Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
  
  Connected to an idle instance.
  
  SQL> startup nomount;
  ORACLE instance started.
  
  Total System Global Area 101782828 bytes
  Fixed Size          451884 bytes
  Variable Size       37748736 bytes
  Database Buffers      62914560 bytes
  Redo Buffers         667648 bytes
  
  SQL> DECLARE
   2  devtype varchar2(256);
   3  done boolean;
   4  BEGIN
   5  devtype:=sys.dbms_backup_restore.deviceAllocate (type=>'',ident=>'t1');
   6  sys.dbms_backup_restore.restoreSetDatafile;
   7  sys.dbms_backup_restore.restoreDatafileTo(dfnumber=>01,toname=>'/opt//oradata/conner/system01.dbf');
   8  sys.dbms_backup_restore.restoreDatafileTo(dfnumber=>02,toname=>'/opt//oradata/conner/undotbs01.dbf');
   9  sys.dbms_backup_restore.restoreDatafileTo(dfnumber=>03,toname=>'/opt//oradata/conner/users01.dbf');
   10  sys.dbms_backup_restore.restoreBackupPiece(done=>done,handle=>'/opt//product/9.2.0/dbs/0ggmiabq_1_1',
  
  params=>null);
   11  sys.dbms_backup_restore.deviceDeallocate;
   12 END;
   13 /
  
  PL/SQL procedure successfully completed.
  
  SQL>
  
  至此,从备份集中读取文件完毕。
  
  4.恢复控制文件
  
  由于大意,也没有备份控制文件,所以只好重建控制文件。
  SQL> alter database mount;
  
  Database altered.
  
  SQL> alter database backup controlfile to trace;
  
  Database altered.
  
  找到trace文件,编辑、执行重建控制文件需要部分:
  
  [@jumper ]$ sqlplus "/ as sysdba"
  SQL*Plus: Release 9.2.0.4.0 - Production on Sat Jun 11 01:30:50 2005
  
  Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
  
  Connected to:
  Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
  With the Partitioning option
  JServer Release 9.2.0.4.0 - Production
  
  SQL> shutdown immediate;
  ORA-01109: database not open
  
  Database dismounted.
  ORACLE instance shut down.
  
  SQL> startup nomount;
  ORACLE instance started.
  
  Total System Global Area 101782828 bytes
  Fixed Size          451884 bytes
  Variable Size       37748736 bytes
  Database Buffers      62914560 bytes
  Redo Buffers         667648 bytes
  SQL> set echo on
  SQL> @ctl
  SQL>
  SQL> CREATE CONTROLFILE REUSE DATABASE "CONNER" RESETLOGS ARCHIVELOG
   2 -- SET STANDBY TO MAXIMIZE PERFORMANCE
   3   MAXLOGFILES 5
   4   MAXLOGMEMBERS 3
   5   MAXDATAFILES 100
   6   MAXINSTANCES 1
   7   MAXLOGHISTORY 1361
   8 LOGFILE
   9  GROUP 1 '/opt//oradata/conner/redo01.log' SIZE 10M,
   10  GROUP 2 '/opt//oradata/conner/redo02.log' SIZE 10M,
   11  GROUP 3 '/opt//oradata/conner/redo03.log' SIZE 10M
   12 -- STANDBY LOGFILE
   13 DATAFILE
   14  '/opt//oradata/conner/system01.dbf',
   15  '/opt//oradata/conner/undotbs01.dbf',
   16  '/opt//oradata/conner/users01.dbf'
   17 CHARACTER SET ZHS16GBK
   18 ;
  
  Control file created.
  
  5.执行恢复
  
  SQL> recover database;
  ORA-00283: recovery session canceled due to errors
  ORA-01610: recovery using the BACKUP CONTROLFILE option must be done
  
  SQL> recover database using backup controlfile until cancel;
  ORA-00279: change 240560269 generated at 06/09/2005 17:33:48 needed for thread 1
  ORA-00289: suggestion : /opt//oradata/conner/archive/1_7.dbf
  ORA-00280: change 240560269 for thread 1 is in sequence #7
  
  Specify log: {=suggested | filename | AUTO | CANCEL}
  
  auto
  ORA-00279: change 240600632 generated at 06/10/2005 10:42:26 needed for thread 1
  ORA-00289: suggestion : /opt//oradata/conner/archive/1_8.dbf
  ORA-00280: change 240600632 for thread 1 is in sequence #8
  ORA-00278: log file '/opt//oradata/conner/archive/1_7.dbf' no longer needed for this recovery
  
  Specify log: {=suggested | filename | AUTO | CANCEL}
  auto
  ORA-00279: change 240620884 generated at 06/10/2005 10:45:42 needed for thread 1
  ORA-00289: suggestion : /opt//oradata/conner/archive/1_9.dbf
  ORA-00280: change 240620884 for thread 1 is in sequence #9
  ORA-00278: log file '/opt//oradata/conner/archive/1_8.dbf' no longer needed for this recovery
  
  ORA-00283: recovery session canceled due to errors
  ORA-00600: internal error code, arguments: [3020], [4242465], [1], [9], [314], [272], [], []
  ORA-10567: Redo is inconsistent with data block (file# 1, block# 48161)
  ORA-10564: tablespace SYSTEM
  ORA-01110: data file 1: '/opt//oradata/conner/system01.dbf'
  ORA-10560: block type 'DATA SEGMENT HEADER - UNLIMITED'
  
  ORA-01112: media recovery not started
  
  SQL> recover database using backup controlfile until cancel;
  ORA-00279: change 240620949 generated at 06/10/2005 10:45:44 needed for thread 1
  ORA-00289: suggestion : /opt//oradata/conner/archive/1_9.dbf
  ORA-00280: change 240620949 for thread 1 is in sequence #9
  
  Specify log: {=suggested | filename | AUTO | CANCEL}
  cancel
  Media recovery cancelled.
  SQL> alter database open resetlogs;
  
  Database altered.
  
  SQL> select name from v$datafile;
  
  NAME
  ------------------------------------------------------------
  /opt//oradata/conner/system01.dbf
  /opt//oradata/conner/undotbs01.dbf
  /opt//oradata/conner/users01.dbf
  
  SQL>
  
  至此恢复完毕。
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