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详细记录一则RAC数据库恢复到异机单实例的案例

作者: | 分类:Backup and Recovery, Oracle, RAC | Tag:, | 评论:8 
字号:T|T

背景描述:来源于一套客户的生产系统的恢复案例,Linux平台的10.2.0.5.0的双节点RAC数据库,由于项目组的应用程序BUG导致,在7月30号下午4点30分左右执行了误操作,将生产系统中一张重要表的所有记录全部update一遍。

处理流程,接到电话之后,让项目组同事紧急使用闪回表尝试找回数据,由于发现错误时已是7月30号晚上,再加上undo_retention设置的偏低,导致报错ORA-01555的错误,未果。不得已让项目组同事参照以前的一则使用LogMiner来恢复数据,依然不幸,找不回数据。

不得已考虑使用之前的备份+归档来恢复到异机单实例环境,执行不完全恢复尝试恢复数据,本文用以记录和还原当时的详细步骤。

1 找到在误操作执行之前的最近一次的有效备份,以及从备份以来到误操作之前的所有归档日志。因为库小,该RAC数据库目前配置在每天晚上23:00开始执行全备份,且包括归档日志的备份。于是,找到29号晚上的全备的备份集。

发现,该库备份的结果是写到+FLASH磁盘组的,10g情况下貌似还不可以直接将数据从ASM磁盘组直接copy到文件系统上来存放。于是,通过RMAN工具将29号23点的全备的备份集重新备份一份到文件系统上来。

找29号晚上的全备结果:

list backup tag=TAG20130729T230017;

根据当时在RMAN中返回的备份集信息,重新备份29号晚上的备份集到文件系统:

 backup backupset 1822 format '/home/oracle/1822.bak';
 backup backupset 1823 format '/home/oracle/1823.bak';
 backup backupset 1824 format '/home/oracle/1824.bak';
 backup backupset 1825 format '/home/oracle/1825.bak';
 backup backupset 1826 format '/home/oracle/1826.bak';
 backup backupset 1827 format '/home/oracle/1827.bak';

找到从备份以来到误操作之前的所有归档日志,并备份这些归档日志到文件系统:

select name,FIRST_TIME from v$archived_log where first_time  between to_date('2013/07/29 22:00:00','yyyy/mm/dd hh24:mi:ss') and to_date('2013/07/30 16:20:00','yyyy/mm/dd hh24:mi:ss');

并且,将新的备份集copy或者FTP至新的单实例环境的机器上。这里存放在单实例环境下的/home/oracle/zl路径下。

2 获取原RAC数据库的参数文件。
利用RAC数据库的SPFILE生成新的PFILE命令:

SQL>CREATE PFILE='/home/oracle/pfile.txt' FROM SPFILE;

插曲1:原参数文件内容如下:

zldb2.__db_cache_size=398458880
zldb1.__db_cache_size=406847488
zldb1.__java_pool_size=4194304
zldb2.__java_pool_size=8388608
zldb1.__large_pool_size=4194304
zldb2.__large_pool_size=4194304
zldb2.__shared_pool_size=629145600
zldb1.__shared_pool_size=624951296
zldb1.__streams_pool_size=4194304
zldb2.__streams_pool_size=4194304
*.audit_file_dest='/u01/app/oracle/admin/zldb/adump'
*.background_dump_dest='/u01/app/oracle/admin/zldb/bdump'
*.cluster_database_instances=2
*.cluster_database=true
*.compatible='10.2.0.5.0'
*.control_files='+DATA/zldb/controlfile/current.256.793214967','+FLASH/zldb/controlfile/current.256.793214967'
*.core_dump_dest='/u01/app/oracle/admin/zldb/cdump'
*.db_block_size=8192
*.db_create_file_dest='+DATA'
*.db_domain=''
*.db_file_multiblock_read_count=16
*.db_name='zldb'
*.db_recovery_file_dest='+FLASH'
*.db_recovery_file_dest_size=107374182400
*.dispatchers='(PROTOCOL=TCP) (SERVICE=zldbXDB)'
zldb1.instance_number=1
zldb2.instance_number=2
*.job_queue_processes=10
Node1.local_listener='(ADDRESS =(PROTOCOL = TCP)(HOST = 192.168.33.31)(PORT = 22))'
Node2.local_listener='(ADDRESS =(PROTOCOL = TCP)(HOST = 192.168.33.32)(PORT = 22))'
*.open_cursors=300
*.pga_aggregate_target=3357540352
*.processes=150
*.remote_listener='LISTENERS_ZLDB'
*.remote_login_passwordfile='exclusive'
*.sga_target=1053818880
zldb2.thread=2
zldb1.thread=1
*.undo_management='AUTO'
*.undo_retention=86400
zldb1.undo_tablespace='UNDOTBS1'
zldb2.undo_tablespace='UNDOTBS2'
*.user_dump_dest='/u01/app/oracle/admin/zldb/udump'

插曲2:从上可以看到,该库的listeners参数肯定是被修改过,因为从alert日志文件内容看到下述信息:

ALTER SYSTEM SET local_listener='(ADDRESS =(PROTOCOL = TCP)(HOST = 192.168.33.31)(PORT = 22))' SCOPE=BOTH SID='Node1';
Fri Nov 23 11:36:19 CST 2012
ALTER SYSTEM SET local_listener='(ADDRESS =(PROTOCOL = TCP)(HOST = 192.168.33.32)(PORT = 22))' SCOPE=BOTH SID='Node2';

3 修改RAC数据库的参数文件,修改为一个可以为单实例数据库使用的初始化参数文件。修改之后的内容如下:

*.__db_cache_size=465567744
*.__java_pool_size=4194304
*.__large_pool_size=4194304
*.__shared_pool_size=541065216
*.__streams_pool_size=8388608
*.audit_file_dest='/u01/app/admin/zldb/adump'
*.background_dump_dest='/u01/app/admin/zldb/bdump'
#*.cluster_database_instances=1
*.cluster_database=false
*.compatible='10.2.0.5.0'
*.control_files='/u01/app/oradata/zldb/control01.ctl'
*.core_dump_dest='/u01/app/admin/zldb/cdump'
*.db_block_size=8192
*.db_create_file_dest='/u01/app/oradata/zldb'
*.db_domain=''
*.db_file_multiblock_read_count=16
*.db_name='zldb'
*.db_recovery_file_dest='/u01/app/oradata/zldb'
*.db_recovery_file_dest_size=107374182
*.dispatchers='(PROTOCOL=TCP) (SERVICE=zldbXDB)'
*.instance_number=1
*.job_queue_processes=10
*.open_cursors=300
*.pga_aggregate_target=3357540352
*.processes=150
*.remote_login_passwordfile='exclusive'
*.sga_target=1053818880
*.thread=1
*.undo_management='AUTO'
*.undo_retention=86400
*.undo_tablespace='UNDOTBS1'
*.user_dump_dest='/u01/app/admin/zldb/udump'

4 创建对应的目录。在一个新的已经安装好10.2.0.5.0软件的环境下,创建下述目录:

/u01/app/oradata/zldb
/u01/app/admin/zldb/adump
/u01/app/admin/zldb/bdump
/u01/app/admin/zldb/cdump
/u01/app/admin/zldb/udump

5 启动单实例库到NOMOUNT状态。

[oracle@localhost ~]$ export ORACLE_SID=zldb
[oracle@localhost ~]$ env|grep ORA
ORACLE_SID=zldb
ORACLE_BASE=/u01/app
ORACLE_TERM=xterm
ORACLE_HOME=/u01/app/oracle/product/10.2.5/db_1
[oracle@localhost zl]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.5.0 - Production on Wed Aug 21 17:42:57 2013

Copyright (c) 1982, 2010, Oracle.  All Rights Reserved.

Connected to an idle instance.

SQL> startup nomout pfile='/home/oracle/pfile.txt';
SP2-0714: invalid combination of STARTUP options
SQL> startup nomount pfile='/home/oracle/pfile.txt';
ORACLE instance started.

Total System Global Area 1056964608 bytes
Fixed Size                  2101608 bytes
Variable Size             260050584 bytes
Database Buffers          788529152 bytes
Redo Buffers                6283264 bytes
SQL>

6 在新环境下使用RMAN工具,还原控制文件。

[oracle@localhost ~]$ export ORACLE_SID=zldb
[oracle@localhost ~]$ env|grep ORA
ORACLE_SID=zldb
ORACLE_BASE=/u01/app
ORACLE_TERM=xterm
ORACLE_HOME=/u01/app/oracle/product/10.2.5/db_1
[oracle@localhost zl]$ rman target /

Recovery Manager: Release 10.2.0.5.0 - Production on Wed Aug 21 17:53:09 2013

Copyright (c) 1982, 2007, Oracle.  All rights reserved.

connected to target database: zldb (not mounted)

RMAN> restore controlfile from '/home/oracle/zl/1823.bak';

Starting restore at 2013/08/21 17:55:49
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=156 devtype=DISK

channel ORA_DISK_1: restoring control file
channel ORA_DISK_1: restore complete, elapsed time: 00:00:03
output filename=/u01/app/oradata/zldb/control01.ctl
Finished restore at 2013/08/21 17:55:55

RMAN>

7 MOUNT 数据库(可直接在RMAN中执行。也可以通过SQL*PluS完成,这里直接在RMAN下完成。),然后注册备份信息到控制文件中

RMAN> alter database mount;

database mounted
released channel: ORA_DISK_1

RMAN> catalog start with '/home/oracle/zl';

Starting implicit crosscheck backup at 2013/08/21 17:56:53
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=156 devtype=DISK
Crosschecked 186 objects
Finished implicit crosscheck backup at 2013/08/21 17:56:56

Starting implicit crosscheck copy at 2013/08/21 17:56:56
using channel ORA_DISK_1
Finished implicit crosscheck copy at 2013/08/21 17:56:56

searching for all files in the recovery area
cataloging files...
no files cataloged

searching for all files that match the pattern /home/oracle/zl

List of Files Unknown to the Database
=====================================
File Name: /home/oracle/zl/1824.bak
File Name: /home/oracle/zl/arc1.arc
File Name: /home/oracle/zl/arc2.arc
File Name: /home/oracle/zl/1826.bak
File Name: /home/oracle/zl/1827.bak
File Name: /home/oracle/zl/1822.bak
File Name: /home/oracle/zl/1825.bak
File Name: /home/oracle/zl/1823.bak

Do you really want to catalog the above files (enter YES or NO)? yes
cataloging files...
cataloging done

List of Cataloged Files
=======================
File Name: /home/oracle/zl/1824.bak
File Name: /home/oracle/zl/arc1.arc
File Name: /home/oracle/zl/arc2.arc
File Name: /home/oracle/zl/1826.bak
File Name: /home/oracle/zl/1827.bak
File Name: /home/oracle/zl/1822.bak
File Name: /home/oracle/zl/1825.bak
File Name: /home/oracle/zl/1823.bak

RMAN>

8 然后restore database。由于之前的数据文件是存放在ASM磁盘组上的,而这里新的单实例环境是使用文件系统来存放数据库的,所以,在RMAN工具中需要使用set newname来重命名数据文件,并将该信息重新写入到控制文件。

RMAN> run
2> {
3> allocate channel c1 type disk;
allocate channel c2 type disk;
allocate channel c3 type disk;
4> 5> 6> allocate channel c4 type disk;
7> set newname for datafile 1 to '/u01/app/oradata/zldb/1.dbf';
8> set newname for datafile 2 to '/u01/app/oradata/zldb/2.dbf';
9> set newname for datafile 3 to '/u01/app/oradata/zldb/3.dbf';
10> set newname for datafile 4 to '/u01/app/oradata/zldb/4.dbf';
11> set newname for datafile 5 to '/u01/app/oradata/zldb/5.dbf';
12> set newname for datafile 6 to '/u01/app/oradata/zldb/6.dbf';
13> set newname for datafile 7 to '/u01/app/oradata/zldb/7.dbf';
14> set newname for datafile 8 to '/u01/app/oradata/zldb/8.dbf';
15> set newname for datafile 9 to '/u01/app/oradata/zldb/9.dbf';
16> set newname for datafile 10 to '/u01/app/oradata/zldb/10.dbf';
17> set newname for datafile 11 to '/u01/app/oradata/zldb/11.dbf';
18> set newname for datafile 12 to '/u01/app/oradata/zldb/12.dbf';
19> set newname for datafile 13 to '/u01/app/oradata/zldb/13.dbf';
20> set newname for datafile 14 to '/u01/app/oradata/zldb/14.dbf';
21> set newname for datafile 15 to '/u01/app/oradata/zldb/15.dbf';
22> set newname for datafile 16 to '/u01/app/oradata/zldb/16.dbf';
23> set newname for datafile 17 to '/u01/app/oradata/zldb/17.dbf';
24> set newname for datafile 18 to '/u01/app/oradata/zldb/18.dbf';
25> set newname for datafile 19 to '/u01/app/oradata/zldb/19.dbf';
26> set newname for datafile 20 to '/u01/app/oradata/zldb/20.dbf';
27> set newname for datafile 21 to '/u01/app/oradata/zldb/21.dbf';
28> set newname for datafile 22 to '/u01/app/oradata/zldb/22.dbf';
29> set newname for datafile 23 to '/u01/app/oradata/zldb/23.dbf';
30> set newname for datafile 24 to '/u01/app/oradata/zldb/24.dbf';
31> set newname for datafile 25 to '/u01/app/oradata/zldb/25.dbf';
32> set newname for datafile 26 to '/u01/app/oradata/zldb/26.dbf';
33> restore database;
34> switch datafile all;
35> }

released channel: ORA_DISK_1
allocated channel: c1
channel c1: sid=156 devtype=DISK

allocated channel: c2
channel c2: sid=154 devtype=DISK

allocated channel: c3
channel c3: sid=153 devtype=DISK

allocated channel: c4
channel c4: sid=152 devtype=DISK

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

Starting restore at 2013/08/21 17:57:23

channel c1: starting datafile backupset restore
channel c1: specifying datafile(s) to restore from backup set
restoring datafile 00006 to /u01/app/oradata/zldb/6.dbf
restoring datafile 00023 to /u01/app/oradata/zldb/23.dbf
restoring datafile 00024 to /u01/app/oradata/zldb/24.dbf
restoring datafile 00025 to /u01/app/oradata/zldb/25.dbf
restoring datafile 00026 to /u01/app/oradata/zldb/26.dbf
channel c1: reading from backup piece /home/oracle/zl/1822.bak
channel c2: starting datafile backupset restore
channel c2: specifying datafile(s) to restore from backup set
restoring datafile 00005 to /u01/app/oradata/zldb/5.dbf
restoring datafile 00016 to /u01/app/oradata/zldb/16.dbf
restoring datafile 00017 to /u01/app/oradata/zldb/17.dbf
restoring datafile 00019 to /u01/app/oradata/zldb/19.dbf
restoring datafile 00020 to /u01/app/oradata/zldb/20.dbf
restoring datafile 00021 to /u01/app/oradata/zldb/21.dbf
restoring datafile 00022 to /u01/app/oradata/zldb/22.dbf
channel c2: reading from backup piece /home/oracle/zl/1826.bak
channel c3: starting datafile backupset restore
channel c3: specifying datafile(s) to restore from backup set
restoring datafile 00003 to /u01/app/oradata/zldb/3.dbf
restoring datafile 00004 to /u01/app/oradata/zldb/4.dbf
restoring datafile 00007 to /u01/app/oradata/zldb/7.dbf
restoring datafile 00009 to /u01/app/oradata/zldb/9.dbf
restoring datafile 00011 to /u01/app/oradata/zldb/11.dbf
restoring datafile 00014 to /u01/app/oradata/zldb/14.dbf
restoring datafile 00018 to /u01/app/oradata/zldb/18.dbf
channel c3: reading from backup piece /home/oracle/zl/1827.bak
channel c4: starting datafile backupset restore
channel c4: specifying datafile(s) to restore from backup set
restoring datafile 00001 to /u01/app/oradata/zldb/1.dbf
restoring datafile 00002 to /u01/app/oradata/zldb/2.dbf
restoring datafile 00008 to /u01/app/oradata/zldb/8.dbf
restoring datafile 00010 to /u01/app/oradata/zldb/10.dbf
restoring datafile 00012 to /u01/app/oradata/zldb/12.dbf
restoring datafile 00013 to /u01/app/oradata/zldb/13.dbf
restoring datafile 00015 to /u01/app/oradata/zldb/15.dbf
channel c4: reading from backup piece /home/oracle/zl/1825.bak
channel c1: restored backup piece 1
piece handle=/home/oracle/zl/1822.bak tag=TAG20130729T230017
channel c1: restore complete, elapsed time: 00:05:41

channel c3: restored backup piece 1
piece handle=/home/oracle/zl/1827.bak tag=TAG20130729T230017
channel c3: restore complete, elapsed time: 00:11:29
channel c4: restored backup piece 1
piece handle=/home/oracle/zl/1825.bak tag=TAG20130729T230017
channel c4: restore complete, elapsed time: 00:11:30
channel c2: restored backup piece 1
piece handle=/home/oracle/zl/1826.bak tag=TAG20130729T230017
channel c2: restore complete, elapsed time: 00:11:37
Finished restore at 2013/08/21 18:09:01

datafile 1 switched to datafile copy
input datafile copy recid=27 stamp=824062143 filename=/u01/app/oradata/zldb/1.dbf
datafile 2 switched to datafile copy
input datafile copy recid=28 stamp=824062143 filename=/u01/app/oradata/zldb/2.dbf
datafile 3 switched to datafile copy
input datafile copy recid=29 stamp=824062143 filename=/u01/app/oradata/zldb/3.dbf
datafile 4 switched to datafile copy
input datafile copy recid=30 stamp=824062143 filename=/u01/app/oradata/zldb/4.dbf
datafile 5 switched to datafile copy
input datafile copy recid=31 stamp=824062143 filename=/u01/app/oradata/zldb/5.dbf
datafile 6 switched to datafile copy
input datafile copy recid=32 stamp=824062143 filename=/u01/app/oradata/zldb/6.dbf
datafile 7 switched to datafile copy
input datafile copy recid=33 stamp=824062143 filename=/u01/app/oradata/zldb/7.dbf
datafile 8 switched to datafile copy
input datafile copy recid=34 stamp=824062143 filename=/u01/app/oradata/zldb/8.dbf
datafile 9 switched to datafile copy
input datafile copy recid=35 stamp=824062144 filename=/u01/app/oradata/zldb/9.dbf
datafile 10 switched to datafile copy
input datafile copy recid=36 stamp=824062144 filename=/u01/app/oradata/zldb/10.dbf
datafile 11 switched to datafile copy
input datafile copy recid=37 stamp=824062144 filename=/u01/app/oradata/zldb/11.dbf
datafile 12 switched to datafile copy
input datafile copy recid=38 stamp=824062144 filename=/u01/app/oradata/zldb/12.dbf
datafile 13 switched to datafile copy
input datafile copy recid=39 stamp=824062144 filename=/u01/app/oradata/zldb/13.dbf
datafile 14 switched to datafile copy
input datafile copy recid=40 stamp=824062144 filename=/u01/app/oradata/zldb/14.dbf
datafile 15 switched to datafile copy
input datafile copy recid=41 stamp=824062144 filename=/u01/app/oradata/zldb/15.dbf
datafile 16 switched to datafile copy
input datafile copy recid=42 stamp=824062144 filename=/u01/app/oradata/zldb/16.dbf
datafile 17 switched to datafile copy
input datafile copy recid=43 stamp=824062144 filename=/u01/app/oradata/zldb/17.dbf
datafile 18 switched to datafile copy
input datafile copy recid=44 stamp=824062144 filename=/u01/app/oradata/zldb/18.dbf
datafile 19 switched to datafile copy
input datafile copy recid=45 stamp=824062144 filename=/u01/app/oradata/zldb/19.dbf
datafile 20 switched to datafile copy
input datafile copy recid=46 stamp=824062144 filename=/u01/app/oradata/zldb/20.dbf
datafile 21 switched to datafile copy
input datafile copy recid=47 stamp=824062144 filename=/u01/app/oradata/zldb/21.dbf
datafile 22 switched to datafile copy
input datafile copy recid=48 stamp=824062144 filename=/u01/app/oradata/zldb/22.dbf
datafile 23 switched to datafile copy
input datafile copy recid=49 stamp=824062144 filename=/u01/app/oradata/zldb/23.dbf
datafile 24 switched to datafile copy
input datafile copy recid=50 stamp=824062144 filename=/u01/app/oradata/zldb/24.dbf
datafile 25 switched to datafile copy
input datafile copy recid=51 stamp=824062144 filename=/u01/app/oradata/zldb/25.dbf
datafile 26 switched to datafile copy
input datafile copy recid=52 stamp=824062144 filename=/u01/app/oradata/zldb/26.dbf
released channel: c1
released channel: c2
released channel: c3
released channel: c4

RMAN>

9 重命名联机日志文件。
重命名之前:

SQL> col status for a10
SQL> select * from v$log;

    GROUP#    THREAD#  SEQUENCE#      BYTES    MEMBERS ARCHIVED  STATUS     FIRST_CHANGE# FIRST_TIME
---------- ---------- ---------- ---------- ---------- --------- ---------- ------------- -------------------
         1          1       1373   52428800          2 YES       INACTIVE       187740095 2013/07/29 16:58:43
         2          1       1374   52428800          2 NO        CURRENT        188086667 2013/07/29 22:00:53
         3          2       1989   52428800          2 NO        CURRENT        188149113 2013/07/29 23:00:04
         4          2       1988   52428800          2 YES       INACTIVE       188096691 2013/07/29 22:01:50

SQL> col member for a50
SQL> select * from v$logfile;

    GROUP# STATUS     TYPE                  MEMBER                                             IS_RECOVE
---------- ---------- --------------------- -------------------------------------------------- ---------
         1            ONLINE                +DATA/zldb/onlinelog/group_1.257.793214967         NO
         1            ONLINE                +FLASH/zldb/onlinelog/group_1.257.793214969        YES
         2            ONLINE                +DATA/zldb/onlinelog/group_2.258.793214969         NO
         2            ONLINE                +FLASH/zldb/onlinelog/group_2.258.793214969        YES
         3            ONLINE                +DATA/zldb/onlinelog/group_3.265.793215729         NO
         3            ONLINE                +FLASH/zldb/onlinelog/group_3.259.793215729        YES
         4            ONLINE                +DATA/zldb/onlinelog/group_4.266.793215731         NO
         4            ONLINE                +FLASH/zldb/onlinelog/group_4.260.793215731        YES

8 rows selected.

SQL>

开始重命名:

SQL> alter database rename file '+DATA/zldb/onlinelog/group_1.257.793214967' to '/u01/app/oradata/zldb/redo01a.log';

Database altered.

SQL> alter database rename file '+FLASH/zldb/onlinelog/group_1.257.793214969' to '/u01/app/oradata/zldb/redo01b.log';

Database altered.

SQL> alter database rename file '+DATA/zldb/onlinelog/group_2.258.793214969' to '/u01/app/oradata/zldb/redo02a.log';

Database altered.

SQL> alter database rename file '+FLASH/zldb/onlinelog/group_2.258.793214969' to '/u01/app/oradata/zldb/redo02b.log';

Database altered.

SQL> alter database rename file '+DATA/zldb/onlinelog/group_3.265.793215729' to '/u01/app/oradata/zldb/redo03a.log';

Database altered.

SQL> alter database rename file '+FLASH/zldb/onlinelog/group_3.259.793215729' to '/u01/app/oradata/zldb/redo03b.log';

Database altered.

SQL> alter database rename file '+DATA/zldb/onlinelog/group_4.266.793215731' to '/u01/app/oradata/zldb/redo04a.log';

Database altered.

SQL> alter database rename file '+FLASH/zldb/onlinelog/group_4.260.793215731' to '/u01/app/oradata/zldb/redo04b.log';

Database altered.

SQL>

重命名之后:

SQL> select * from v$log;

    GROUP#    THREAD#  SEQUENCE#      BYTES    MEMBERS ARCHIVED  STATUS     FIRST_CHANGE# FIRST_TIME
---------- ---------- ---------- ---------- ---------- --------- ---------- ------------- -------------------
         1          1       1373   52428800          2 YES       INACTIVE       187740095 2013/07/29 16:58:43
         2          1       1374   52428800          2 NO        CURRENT        188086667 2013/07/29 22:00:53
         3          2       1989   52428800          2 NO        CURRENT        188149113 2013/07/29 23:00:04
         4          2       1988   52428800          2 YES       INACTIVE       188096691 2013/07/29 22:01:50

SQL> select * from v$logfile;

    GROUP# STATUS     TYPE                  MEMBER                                             IS_RECOVE
---------- ---------- --------------------- -------------------------------------------------- ---------
         1            ONLINE                /u01/app/oradata/zldb/redo01a.log                  NO
         1            ONLINE                /u01/app/oradata/zldb/redo01b.log                  NO
         2            ONLINE                /u01/app/oradata/zldb/redo02a.log                  NO
         2            ONLINE                /u01/app/oradata/zldb/redo02b.log                  NO
         3            ONLINE                /u01/app/oradata/zldb/redo03a.log                  NO
         3            ONLINE                /u01/app/oradata/zldb/redo03b.log                  NO
         4            ONLINE                /u01/app/oradata/zldb/redo04a.log                  NO
         4            ONLINE                /u01/app/oradata/zldb/redo04b.log                  NO

8 rows selected.

SQL>

10 RECOVER database。
这里,从第7步骤执行后的结果,我们可以从RMAN中看到,当前环境下,控制文件里记录的新的归档日志文件备份信息如下,其中已经包含RAC双线程下从7月29号22:00到7月30号16:20分之间的所有归档日志的备份信息:

RMAN> list backup of archivelog all;

List of Backup Sets
===================

BS Key  Size       Device Type Elapsed Time Completion Time    
------- ---------- ----------- ------------ -------------------
1824    3.50K      DISK        00:00:00     2013/07/31 16:34:06
        BP Key: 1824   Status: AVAILABLE  Compressed: NO  Tag: TAG20130731T163406
        Piece Name: /home/oracle/zl/arc1.arc

  List of Archived Logs in backup set 1824
  Thrd Seq     Low SCN    Low Time            Next SCN   Next Time
  ---- ------- ---------- ------------------- ---------- ---------
  1    1374    188086667  2013/07/29 22:00:53 188173593  2013/07/29 23:25:01
  1    1375    188173593  2013/07/29 23:25:01 188569236  2013/07/30 07:00:24
  1    1376    188569236  2013/07/30 07:00:24 188847801  2013/07/30 11:48:32
  1    1377    188847801  2013/07/30 11:48:32 189110687  2013/07/30 16:21:18

BS Key  Size       Device Type Elapsed Time Completion Time    
------- ---------- ----------- ------------ -------------------
1825    515.04M    DISK        00:00:00     2013/07/31 16:32:30
        BP Key: 1825   Status: AVAILABLE  Compressed: NO  Tag: TAG20130731T163230
        Piece Name: /home/oracle/zl/arc2.arc

  List of Archived Logs in backup set 1825
  Thrd Seq     Low SCN    Low Time            Next SCN   Next Time
  ---- ------- ---------- ------------------- ---------- ---------
  2    1987    188086615  2013/07/29 22:00:52 188096691  2013/07/29 22:01:50
  2    1988    188096691  2013/07/29 22:01:50 188149113  2013/07/29 23:00:04
  2    1989    188149113  2013/07/29 23:00:04 188173580  2013/07/29 23:25:01
  2    1990    188173580  2013/07/29 23:25:01 188279567  2013/07/30 01:21:06
  2    1991    188279567  2013/07/30 01:21:06 188423782  2013/07/30 04:09:46
  2    1992    188423782  2013/07/30 04:09:46 188569192  2013/07/30 07:00:24
  2    1993    188569192  2013/07/30 07:00:24 188672390  2013/07/30 08:56:37
  2    1994    188672390  2013/07/30 08:56:37 188756632  2013/07/30 10:16:49
  2    1995    188756632  2013/07/30 10:16:49 188847773  2013/07/30 11:48:31
  2    1996    188847773  2013/07/30 11:48:31 188937795  2013/07/30 13:26:24
  2    1997    188937795  2013/07/30 13:26:24 189020185  2013/07/30 14:49:20
  2    1998    189020185  2013/07/30 14:49:20 189110668  2013/07/30 16:21:17

RMAN>

开始RECOVER:

RMAN> recover database;

Starting recover at 2013/08/26 16:54:48
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=154 devtype=DISK

starting media recovery

channel ORA_DISK_1: starting archive log restore to default destination
channel ORA_DISK_1: restoring archive log
archive log thread=1 sequence=1374
channel ORA_DISK_1: restoring archive log
archive log thread=1 sequence=1375
channel ORA_DISK_1: restoring archive log
archive log thread=1 sequence=1376
channel ORA_DISK_1: restoring archive log
archive log thread=1 sequence=1377
channel ORA_DISK_1: reading from backup piece /home/oracle/zl/arc1.arc
Oracle Error: 
ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below
ORA-01152: file 1 was not restored from a sufficiently old backup 
ORA-01110: data file 1: '/u01/app/oradata/zldb/1.dbf'

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of recover command at 08/26/2013 16:54:52
ORA-19870: error reading backup piece /home/oracle/zl/arc1.arc
ORA-19809: limit exceeded for recovery files
ORA-19804: cannot reclaim 512 bytes disk space from 107374182 limit

RMAN>

插曲3:RECOVER报错,开始处理报错:

[oracle@localhost zldb]$ oerr ora 19870
19870, 00000, "error reading backup piece %s"
// *Cause: This error should be followed by other errors indicating
//         the cause of the problem.
// *Action: See other errors actions.
//          
// Do not use message 19871; it is used by RMAN client for testing previous
// resync time when using backup/standby control file.
[oracle@localhost zldb]$ oerr ora 19809
19809, 00000, "limit exceeded for recovery files"
//*Cause: The limit for recovery files specified by the
//        DB_RECOVERY_FILE_DEST_SIZE was exceeded.
//*Action:The error is accompanied by 19804. See message 19804 for further
//        details.
[oracle@localhost zldb]$ oerr ora 19804
19804, 00000, "cannot reclaim %s bytes disk space from %s limit"
// *Cause: Oracle cannot reclaim disk space of specified bytes from the
//         DB_RECOVERY_FILE_DEST_SIZE limit.
// *Action: There are five possible solutions:
//          1) Take frequent backup of recovery area using RMAN.
//          2) Consider changing RMAN retention policy.
//          3) Consider changing RMAN archivelog deletion policy.
//          4) Add disk space and increase DB_RECOVERY_FILE_DEST_SIZE.
//          5) Delete files from recovery area using RMAN.
[oracle@localhost zldb]$

从报错信息来看,应该是DB_RECOVERY_FILE_DEST_SIZE参数限制了数据恢复区的大小,导致RECOVER失败

SQL> show parameter db_recover

NAME                                 TYPE                              VALUE
------------------------------------ --------------------------------- ------------------------------
db_recovery_file_dest                string                            /u01/app/oradata/zldb
db_recovery_file_dest_size           big integer                       107374182
SQL> alter system set db_recovery_file_dest_size=40G;

System altered.

SQL> show parameter db_recover

NAME                                 TYPE                              VALUE
------------------------------------ --------------------------------- ------------------------------
db_recovery_file_dest                string                            /u01/app/oradata/zldb
db_recovery_file_dest_size           big integer                       40G
SQL>

重新执行RECOVER:

RMAN> recover database;

Starting recover at 2013/08/26 16:59:28
using channel ORA_DISK_1

starting media recovery

channel ORA_DISK_1: starting archive log restore to default destination
channel ORA_DISK_1: restoring archive log
archive log thread=1 sequence=1374
channel ORA_DISK_1: restoring archive log
archive log thread=1 sequence=1375
channel ORA_DISK_1: restoring archive log
archive log thread=1 sequence=1376
channel ORA_DISK_1: restoring archive log
archive log thread=1 sequence=1377
channel ORA_DISK_1: reading from backup piece /home/oracle/zl/arc1.arc
channel ORA_DISK_1: restored backup piece 1
piece handle=/home/oracle/zl/arc1.arc tag=TAG20130731T163406
channel ORA_DISK_1: restore complete, elapsed time: 00:00:02
channel ORA_DISK_1: starting archive log restore to default destination
channel ORA_DISK_1: restoring archive log
archive log thread=2 sequence=1989
channel ORA_DISK_1: restoring archive log
archive log thread=2 sequence=1990
channel ORA_DISK_1: restoring archive log
archive log thread=2 sequence=1991
channel ORA_DISK_1: restoring archive log
archive log thread=2 sequence=1992
channel ORA_DISK_1: restoring archive log
archive log thread=2 sequence=1993
channel ORA_DISK_1: restoring archive log
archive log thread=2 sequence=1994
channel ORA_DISK_1: restoring archive log
archive log thread=2 sequence=1995
channel ORA_DISK_1: restoring archive log
archive log thread=2 sequence=1996
channel ORA_DISK_1: restoring archive log
archive log thread=2 sequence=1997
channel ORA_DISK_1: restoring archive log
archive log thread=2 sequence=1998
channel ORA_DISK_1: reading from backup piece /home/oracle/zl/arc2.arc
channel ORA_DISK_1: restored backup piece 1
piece handle=/home/oracle/zl/arc2.arc tag=TAG20130731T163230
channel ORA_DISK_1: restore complete, elapsed time: 00:00:26
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1989_91p67mxo_.arc thread=2 sequence=1989
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_1_1374_91p67kqh_.arc thread=1 sequence=1374
channel default: deleting archive log(s)
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1989_91p67mxo_.arc recid=3334 stamp=824489982
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1990_91p67my5_.arc thread=2 sequence=1990
channel default: deleting archive log(s)
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_1_1374_91p67kqh_.arc recid=3330 stamp=824489969
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_1_1375_91p67kqz_.arc thread=1 sequence=1375
channel default: deleting archive log(s)
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1990_91p67my5_.arc recid=3335 stamp=824489982
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1991_91p67myc_.arc thread=2 sequence=1991
channel default: deleting archive log(s)
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1991_91p67myc_.arc recid=3336 stamp=824489982
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1992_91p67myq_.arc thread=2 sequence=1992
channel default: deleting archive log(s)
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1992_91p67myq_.arc recid=3337 stamp=824489982
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1993_91p67yp3_.arc thread=2 sequence=1993
channel default: deleting archive log(s)
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_1_1375_91p67kqz_.arc recid=3331 stamp=824489969
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_1_1376_91p67kr9_.arc thread=1 sequence=1376
channel default: deleting archive log(s)
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1993_91p67yp3_.arc recid=3342 stamp=824489987
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1994_91p67ysz_.arc thread=2 sequence=1994
channel default: deleting archive log(s)
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1994_91p67ysz_.arc recid=3343 stamp=824489987
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1995_91p67n06_.arc thread=2 sequence=1995
channel default: deleting archive log(s)
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1995_91p67n06_.arc recid=3338 stamp=824489982
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1996_91p67n0f_.arc thread=2 sequence=1996
channel default: deleting archive log(s)
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_1_1376_91p67kr9_.arc recid=3332 stamp=824489969
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_1_1377_91p67krh_.arc thread=1 sequence=1377
channel default: deleting archive log(s)
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1996_91p67n0f_.arc recid=3339 stamp=824489982
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1997_91p67n0o_.arc thread=2 sequence=1997
channel default: deleting archive log(s)
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1997_91p67n0o_.arc recid=3340 stamp=824489982
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1998_91p67ylw_.arc thread=2 sequence=1998
channel default: deleting archive log(s)
archive log filename=/u01/app/oradata/zldb/ZLDB/archivelog/2013_08_26/o1_mf_2_1998_91p67ylw_.arc recid=3341 stamp=824489987
unable to find archive log
archive log thread=2 sequence=1999
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of recover command at 08/26/2013 17:01:32
RMAN-06054: media recovery requesting unknown log: thread 2 seq 1999 lowscn 189110668

RMAN>

这次,从RECOVER报错信息看到RMAN识别不了 thread 2 seq 1999的归档日志。的确,这也是我们预期的,因为thread 2 seq 1999的归档日志从上述的归档日志备份信息是不存在的,所以,RMAN不识别,再者也不是我们需要的归档日志。恢复到此阶段,直接OK。
11 重新以resetlogs方式来启动新的单实例数据库,并确认恢复之后的结果。

SQL> alter database open resetlogs;

Database altered.

SQL>
SQL> select count(*) from CUL_GMAR.OPM_BL_HEADER;

  COUNT(*)
----------
      7791

SQL>

经和项目组确认,已经是最大限度的找回了误操作的数据。

12 删除RAC的多余UNDO表空间和线程。
处理原RAC下的第2个线程:

SQL> select THREAD#, STATUS, ENABLED from v$thread;

   THREAD# STATUS     ENABLED
---------- ---------- ------------------------
         1 OPEN       PUBLIC
         2 CLOSED     PUBLIC

SQL> select * from v$log;

    GROUP#    THREAD#  SEQUENCE#      BYTES    MEMBERS ARCHIVED  STATUS     FIRST_CHANGE# FIRST_TIME
---------- ---------- ---------- ---------- ---------- --------- ---------- ------------- -------------------
         1          1         19   52428800          2 YES       INACTIVE       189209640 2013/08/26 22:00:54
         2          1         20   52428800          2 NO        CURRENT        189295930 2013/08/27 02:00:13
         3          2          7   52428800          2 NO        CURRENT        189180639 2013/08/26 17:51:27
         4          2          6   52428800          2 YES       INACTIVE       189169179 2013/08/26 17:50:16

SQL>

删除第2个线程,及删除线程2的联机重做日志文件:

SQL> alter database disable thread 2;

Database altered.
SQL> alter database drop logfile group 3;
alter database drop logfile group 3
*
ERROR at line 1:
ORA-00350: log 3 of instance zldb2 (thread 2) needs to be archived
ORA-00312: online log 3 thread 2: '/u01/app/oradata/zldb/redo03a.log'
ORA-00312: online log 3 thread 2: '/u01/app/oradata/zldb/redo03b.log'

SQL> alter database clear unarchived logfile group 3;

Database altered.

SQL> alter database drop logfile group 3;

Database altered.

SQL> alter database drop logfile group 4;

Database altered.

SQL> select THREAD#, STATUS, ENABLED from v$thread;

   THREAD# STATUS     ENABLED
---------- ---------- ------------------------
         1 OPEN       PUBLIC

SQL> select * from v$log;

    GROUP#    THREAD#  SEQUENCE#      BYTES    MEMBERS ARCHIVED  STATUS     FIRST_CHANGE# FIRST_TIME
---------- ---------- ---------- ---------- ---------- --------- ---------- ------------- -------------------
         1          1         19   52428800          2 YES       INACTIVE       189209640 2013/08/26 22:00:54
         2          1         20   52428800          2 NO        CURRENT        189295930 2013/08/27 02:00:13

SQL>

删除多余的UNDO表空间:

SQL> select tablespace_name,contents from dba_tablespaces where contents='UNDO';

TABLESPACE_NAME                                                                            CONTENTS
------------------------------------------------------------------------------------------ ---------------------------
UNDOTBS1                                                                                   UNDO
UNDOTBS2                                                                                   UNDO

SQL> show parameter undo

NAME                                 TYPE                              VALUE
------------------------------------ --------------------------------- ------------------------------
undo_management                      string                            AUTO
undo_retention                       integer                           86400
undo_tablespace                      string                            UNDOTBS1
SQL> drop tablespace undotbs2 including contents and datafiles;

Tablespace dropped.

SQL> select tablespace_name,contents from dba_tablespaces where contents='UNDO';

TABLESPACE_NAME                                                                            CONTENTS
------------------------------------------------------------------------------------------ ---------------------------
UNDOTBS1                                                                                   UNDO

SQL> show parameter undo

NAME                                 TYPE                              VALUE
------------------------------------ --------------------------------- ------------------------------
undo_management                      string                            AUTO
undo_retention                       integer                           86400
undo_tablespace                      string                            UNDOTBS1
SQL>

临时表空间的处理,由于在第11步骤中,RESETLOGS方式启库的时候,从告警日志文件中看到下述信息,数据库自动重新创建临时文件,并且从数据库中可以验证到,故不需重新创建临时表空间:

Mon Aug 26 17:16:42 CST 2013
File 201 not verified due to error ORA-01157
Mon Aug 26 17:16:42 CST 2013
Dictionary check complete
Mon Aug 26 17:16:42 CST 2013
SMON: enabling tx recovery
Mon Aug 26 17:16:43 CST 2013
Re-creating tempfile +DATA/zldb/tempfile/temp.262.793214975 as /u01/app/oradata/zldb/ZLDB/datafile/o1_mf_temp_91p77vly_.tmp
Database Characterset is ZHS16GBK
Opening with internal Resource Manager plan
SQL> select name from v$tempfile;

NAME
------------------------------------------------------------
/u01/app/oradata/zldb/ZLDB/datafile/o1_mf_temp_91p77vly_.tmp

SQL>

小结:

1 数据库上的各种操作要谨慎,尤其尤其是生产库。如果不是项目组的那个误操作,也不会促成这篇文字;当然,插曲1中提到的那个listener参数被误修改就是另外一种误修改;

2 数据库的备份很重要,如果该库没做备份的话,估计恢复数据就是难上加难的事儿了;

顶一下
(3)
60%
踩一下
(2)
40%

8 篇回应 (访客:4 篇, 博主:4 篇)

  1. gjw1987b 2013-28-08

    非常详细
    支持!

    #-49楼
    • admin 2013-28-08

      过奖过奖。只是把当时的场景给还原出来,供大家分享。

  2. kommy 2013-28-08

    插曲1中LOCAL_LISTENER在10G中必须修改的吧,这个是10G RAC下监听的一个BUG

    #-48楼
    • admin 2013-28-08

      是的。这个要修改。不过从alert日志里看到的信息,Node1.local_listener='(ADDRESS =(PROTOCOL = TCP)(HOST = 192.168.33.31)(PORT = 22))’应该是人为修改的。

  3. zeyuan 2013-6-09

    如果单机环境是否可以如下2种操作方法:
    1.使用误操作执行之前的最近一次的有效备份,以及从备份以来到误操作之前的所有归档日志:
    alter database mount;
    recovery database until cancel
    alter database open read only
    exp table
    shutdown immediate;
    使用全部归档+redo
    alter database mount;
    recovery database until cancel
    alter database open resetlogs
    2.如果DB启用了闪回功能,且误操作的日志未被覆盖,使用flashback log:
    alter database mount
    flashback database to timestamp…
    alter database open read only
    exp table
    recovery database

    #-47楼
    • admin 2013-9-09

      @zeyuan
      你说的第2种方法可行。
      第1种思路有问题。首先,recovery database until cancel之后,alter database open read only肯定行不通。其次,接下来的recovery database until cancel,再alter database open resetlogs的话,不是要丢失数据么?

  4. zeyuan 2013-10-09

    @adim我思路确实错了,
    1.until cancel,后打开数据库必须用resetlogs,
    recovery database until cancel 后Resetlogs打开DB,前提DB正常关闭,归档都在,也属于完全恢复吧?
    2.我想在原库上操作,把原库恢复到误操作前状态,导出表后,在把库恢复到最新状态,用什么方法呢?resetlogs做恢复只能用一次。

    #-46楼
    • admin 2013-10-09

      @zeyuan
      1 只要是recover 之后,使用resetlogs方式启库的话,都属于不完全恢复;
      2 你说的这种情况,前提应该是数据库有启用FLASHBACK功能。可以整库闪回到误操作之前的某个时间点,然后read only方式启库,exp/expdp导出,然后重新将库启动到当前状态,最后imp/impdp导入数据即可。

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