RMAN 备份异机恢复 并创建新DBID
- 测试平台信息:
- Oracle:11gR2
- 操作系统:Redhat 5.5
- Target DB:dave
- 几点说明:
- (1)RMAN 异机恢复的时候,db_name必须相同。 如果说要想改成其他的实例名,可以在恢复成功后,用nid 命令修改。 实例名的信息会记录到控制文件里,所以如果在恢复的时候,如果实例名不一致,恢复的时候会报错。
- (2)如果恢复的路径和源库不一致,就需要在restore时用set 命令指定新位置。 并且使用switch datafile all将信息更新的到控制文件。
- 在做duplicate的时候,RMAN 会自动根据pfile中的log_file_name_convert和db_file_name_convert来进行set 的转换。 手工restore时,只能只只能使用set 命令。
- (3)异机恢复对相同目录和不同目录都做了说明。
- (4)最后测试了NID 修改DBID 和DBNAME.
- 一. Target 库准备工作:
- 1. 查询DBID
- SQL> select name,dbid from v$database;
- NAME DBID
- --------- ----------
- DAVE 808234286
- 2. 备份DB
- 关于RMAN 的shell 备份脚本,参考:
- Nocatalog 下的RMAN 增量备份 shell脚本
- 在这里我用0级和1级备份了下DB。
- [oracle@qs-dmm-rh1 backup]$ ls
- arch_0pm6qt8q_1_1_20110309 dave_lev0_0jm6qt77_1_1_20110309 dave_lev1_0um6qtcq_1_1_20110309
- arch_0qm6qt8q_1_1_20110309 dave_lev0_0km6qt77_1_1_20110309 dave_lev1_0vm6qtcq_1_1_20110309
- arch_13m6qtda_1_1_20110309 dave_lev0_0lm6qt77_1_1_20110309 dave_lev1_11m6qtd7_1_1_20110309
- arch_14m6qtda_1_1_20110309 dave_lev0_0nm6qt7c_1_1_20110309 dave_spfile_16m6qtde_1_1_20110309
- ctl_file_15m6qtdc_1_1_20110309 dave_lev1_0tm6qtcq_1_1_20110309
- 二. Auxiliary库准备工作:
- 1. 创建口令文件
- [oracle@qs-dmm-rh2 trace]$ orapwd file=?/dbs/orapwdave password=oracle
- 2. 创建相关的目录
- [oracle@qs-dmm-rh2 u01]$ mkdir oradata
- [oracle@qs-dmm-rh2 oradata]$ pwd
- /u01/oradata
- 3. 创建初始化参数
- 将Target 库的pfile 文件copy过来。
- 也可以使用RMAN 从我们Target库的备份集中恢复,因为我们之前备份过spfile。不过使用RMAN, DB要先启动到nomout 状态。 这个可以用默认的init.ora来启动。
- [oracle@qs-dmm-rh2 backup]$ export ORACLE_SID=dave
- [oracle@qs-dmm-rh2 backup]$ rman target /
- Recovery Manager: Release 11.2.0.1.0 - Production on Fri Mar 11 15:11:31 2011
- Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
- connected to target database: DAVE (not mounted)
- RMAN> restore spfile to pfile '/u01/app/oracle/product/11.2.0/dbhome_1/dbs/initdave2.ora' from '/u01/backup/dave_spfile_16m6qtde_1_1_20110309';
- Starting restore at 11-MAR-11
- using target database control file instead of recovery catalog
- allocated channel: ORA_DISK_1
- channel ORA_DISK_1: SID=19 device type=DISK
- channel ORA_DISK_1: restoring spfile from AUTOBACKUP /u01/backup/dave_spfile_16m6qtde_1_1_20110309
- channel ORA_DISK_1: SPFILE restore from AUTOBACKUP complete
- Finished restore at 11-MAR-11
- 如果修改数据文件保存的位置,那么要修改控制文件的相关的参数:
- *.control_files='/u01/oradata/control01.ctl','/u01/oradata/control02.ctl','/u01/oradata/control03.ctl'
- *.db_name='dave'
- 4. 将用pfile将Auxiliary库启动到nomout 状态
- SQL> startup nomount pfile=?/dbs/initdave.ora
- 5. 恢复控制文件
- [oracle@qs-dmm-rh2 dbs]$ export ORACLE_SID=dave
- [oracle@qs-dmm-rh2 dbs]$ rman target /
- Recovery Manager: Release 11.2.0.1.0 - Production on Fri Mar 11 15:25:55 2011
- Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
- connected to target database: DAVE (not mounted)
- RMAN> restore controlfile from '/u01/backup/ctl_file_15m6qtdc_1_1_20110309';
- Starting restore at 11-MAR-11
- using target database control file instead of recovery catalog
- allocated channel: ORA_DISK_1
- channel ORA_DISK_1: SID=20 device type=DISK
- channel ORA_DISK_1: restoring control file
- channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
- output file name=/u01/oradata/control01.ctl
- output file name=/u01/oradata/control02.ctl
- output file name=/u01/oradata/control03.ctl
- Finished restore at 11-MAR-11
- restore 的时候需要控制文件,控制文件恢复的位置,是我们在pfile中的control_files参数控制的。
- 6. 将DB 启动到mout状态
- RMAN> alter database mount;
- database mounted
- released channel: ORA_DISK_1
- 7. restore 数据库
- 7.1 恢复目录不同的情况:
- 因为我们的路径不同,所以我们需要使用set 命令转换一下路径。
- 到Target 库查询一下:
- SQL> select file_id,file_name from dba_data_files;
- FILE_ID FILE_NAME
- ---------- -------------------------------------------
- 4 /u01/app/oracle/oradata/dave/users01.dbf
- 3 /u01/app/oracle/oradata/dave/undotbs01.dbf
- 2 /u01/app/oracle/oradata/dave/sysaux01.dbf
- 1 /u01/app/oracle/oradata/dave/system01.dbf
- SQL> select file_id,file_name from dba_temp_files;
- FILE_ID FILE_NAME
- ---------- ------------------------------------------
- 1 /u01/app/oracle/oradata/dave/temp01.dbf
- 注意,restore 的时候不会对temp 表空间进行restore。所以等restore 之后,我们需要手工创建temp表空间。
- RMAN> run
- 2> {
- set newname for datafile 1 to "/u01/oradata/system01.dbf";
- 3> 4> set newname for datafile 2 to "/u01/oradata/sysaux01.dbf";
- 5> set newname for datafile 3 to "/u01/oradata/undotbs01.dbf";
- 6> set newname for datafile 4 to "/u01/oradata/users01.dbf";
- 7> restore database;
- 8> switch datafile all;
- 9> }
- 对switch datafile all的说明:
- --对于nocatalog 模式下,rman备份的信息是保存在控制文件里的,包括文件的路径信息。 这里的switch datafile all的作用,就是更新控制文件里的信息。
- executing command: SET NEWNAME
- released channel: ORA_DISK_1
- executing command: SET NEWNAME
- executing command: SET NEWNAME
- executing command: SET NEWNAME
- Starting restore at 11-MAR-11
- allocated channel: ORA_DISK_1
- channel ORA_DISK_1: SID=20 device type=DISK
- channel ORA_DISK_1: starting datafile backup set restore
- channel ORA_DISK_1: specifying datafile(s) to restore from backup set
- channel ORA_DISK_1: restoring datafile 00003 to /u01/oradata/undotbs01.dbf
- channel ORA_DISK_1: reading from backup piece /u01/backup/dave_lev0_0lm6qt77_1_1_20110309
- channel ORA_DISK_1: piece handle=/u01/backup/dave_lev0_0lm6qt77_1_1_20110309 tag=DAVE_LEV0
- channel ORA_DISK_1: restored backup piece 1
- channel ORA_DISK_1: restore complete, elapsed time: 00:00:03
- channel ORA_DISK_1: starting datafile backup set restore
- channel ORA_DISK_1: specifying datafile(s) to restore from backup set
- channel ORA_DISK_1: restoring datafile 00004 to /u01/oradata/users01.dbf
- channel ORA_DISK_1: reading from backup piece /u01/backup/dave_lev0_0nm6qt7c_1_1_20110309
- channel ORA_DISK_1: piece handle=/u01/backup/dave_lev0_0nm6qt7c_1_1_20110309 tag=DAVE_LEV0
- channel ORA_DISK_1: restored backup piece 1
- channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
- channel ORA_DISK_1: starting datafile backup set restore
- channel ORA_DISK_1: specifying datafile(s) to restore from backup set
- channel ORA_DISK_1: restoring datafile 00002 to /u01/oradata/sysaux01.dbf
- channel ORA_DISK_1: reading from backup piece /u01/backup/dave_lev0_0km6qt77_1_1_20110309
- channel ORA_DISK_1: piece handle=/u01/backup/dave_lev0_0km6qt77_1_1_20110309 tag=DAVE_LEV0
- channel ORA_DISK_1: restored backup piece 1
- channel ORA_DISK_1: restore complete, elapsed time: 00:00:15
- channel ORA_DISK_1: starting datafile backup set restore
- channel ORA_DISK_1: specifying datafile(s) to restore from backup set
- channel ORA_DISK_1: restoring datafile 00001 to /u01/oradata/system01.dbf
- channel ORA_DISK_1: reading from backup piece /u01/backup/dave_lev0_0jm6qt77_1_1_20110309
- channel ORA_DISK_1: piece handle=/u01/backup/dave_lev0_0jm6qt77_1_1_20110309 tag=DAVE_LEV0
- channel ORA_DISK_1: restored backup piece 1
- channel ORA_DISK_1: restore complete, elapsed time: 00:00:25
- Finished restore at 11-MAR-11
- datafile 1 switched to datafile copy
- input datafile copy RECID=5 STAMP=745522150 file name=/u01/oradata/system01.dbf
- datafile 2 switched to datafile copy
- input datafile copy RECID=6 STAMP=745522150 file name=/u01/oradata/sysaux01.dbf
- datafile 3 switched to datafile copy
- input datafile copy RECID=7 STAMP=745522150 file name=/u01/oradata/undotbs01.dbf
- datafile 4 switched to datafile copy
- input datafile copy RECID=8 STAMP=745522150 file name=/u01/oradata/users01.dbf
- 7.2 恢复目录相同
- 这种情况比较简单,直接:
- RMAN> restore database;
- 8. recover DB
- RMAN> recover database;
- Starting recover at 11-MAR-11
- using channel ORA_DISK_1
- channel ORA_DISK_1: starting incremental datafile backup set restore
- channel ORA_DISK_1: specifying datafile(s) to restore from backup set
- destination for restore of datafile 00001: /u01/oradata/system01.dbf
- channel ORA_DISK_1: reading from backup piece /u01/backup/dave_lev1_0tm6qtcq_1_1_20110309
- channel ORA_DISK_1: piece handle=/u01/backup/dave_lev1_0tm6qtcq_1_1_20110309 tag=DAVE_LEV1
- channel ORA_DISK_1: restored backup piece 1
- channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
- channel ORA_DISK_1: starting incremental datafile backup set restore
- channel ORA_DISK_1: specifying datafile(s) to restore from backup set
- destination for restore of datafile 00002: /u01/oradata/sysaux01.dbf
- channel ORA_DISK_1: reading from backup piece /u01/backup/dave_lev1_0um6qtcq_1_1_20110309
- channel ORA_DISK_1: piece handle=/u01/backup/dave_lev1_0um6qtcq_1_1_20110309 tag=DAVE_LEV1
- channel ORA_DISK_1: restored backup piece 1
- channel ORA_DISK_1: restore complete, elapsed time: 00:00:02
- channel ORA_DISK_1: starting incremental datafile backup set restore
- channel ORA_DISK_1: specifying datafile(s) to restore from backup set
- destination for restore of datafile 00003: /u01/oradata/undotbs01.dbf
- channel ORA_DISK_1: reading from backup piece /u01/backup/dave_lev1_0vm6qtcq_1_1_20110309
- channel ORA_DISK_1: piece handle=/u01/backup/dave_lev1_0vm6qtcq_1_1_20110309 tag=DAVE_LEV1
- channel ORA_DISK_1: restored backup piece 1
- channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
- channel ORA_DISK_1: starting incremental datafile backup set restore
- channel ORA_DISK_1: specifying datafile(s) to restore from backup set
- destination for restore of datafile 00004: /u01/oradata/users01.dbf
- channel ORA_DISK_1: reading from backup piece /u01/backup/dave_lev1_11m6qtd7_1_1_20110309
- channel ORA_DISK_1: piece handle=/u01/backup/dave_lev1_11m6qtd7_1_1_20110309 tag=DAVE_LEV1
- channel ORA_DISK_1: restored backup piece 1
- channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
- starting media recovery
- channel ORA_DISK_1: starting archived log restore to default destination
- channel ORA_DISK_1: restoring archived log
- archived log thread=1 sequence=7
- channel ORA_DISK_1: reading from backup piece /u01/backup/arch_13m6qtda_1_1_20110309
- channel ORA_DISK_1: piece handle=/u01/backup/arch_13m6qtda_1_1_20110309 tag=ARC_BAK
- channel ORA_DISK_1: restored backup piece 1
- channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
- archived log file name=/u01/app/oracle/product/11.2.0/dbhome_1/dbs/arch1_7_745352047.dbf thread=1 sequence=7
- channel ORA_DISK_1: starting archived log restore to default destination
- channel ORA_DISK_1: restoring archived log
- archived log thread=1 sequence=8
- channel ORA_DISK_1: reading from backup piece /u01/backup/arch_14m6qtda_1_1_20110309
- channel ORA_DISK_1: piece handle=/u01/backup/arch_14m6qtda_1_1_20110309 tag=ARC_BAK
- channel ORA_DISK_1: restored backup piece 1
- channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
- archived log file name=/u01/app/oracle/product/11.2.0/dbhome_1/dbs/arch1_8_745352047.dbf thread=1 sequence=8
- unable to find archived log
- archived log thread=1 sequence=9
- RMAN-00571: ===========================================================
- RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
- RMAN-00571: ===========================================================
- RMAN-03002: failure of recover command at 03/11/2011 17:32:00
- RMAN-06054: media recovery requesting unknown archived log for thread 1 with sequence 9 and starting SCN of 823627
- RMAN>
- 之后会报一个错误:
- RMAN-06054: media recovery requesting unknown archived log for thread 1 with sequence 9 and starting SCN of 823627
- 这里是提醒恢复到一个未知的scn号。在alter database mount之后,通过set until scn或者set until time命令设置恢复到的scn号或时间。就可以避免这个错误。
- 9. 用open resetlogs 打开数据库
- SQL> alter database open resetlogs;
- Database altered.
- 我测试的平台是11gR2的版本,在open resetlogs 之后,自动在原来默认的路径创建了temp 表空间和3组redo 文件。
- 如果恢复目录和原来相同,就不用修改。
- 如果目录不同,我们就需要把这些文件移到我们现在的data目录。
- 源目录:
- [oracle@qs-dmm-rh2 dave]$ pwd
- /u01/app/oracle/oradata/dave
- [oracle@qs-dmm-rh2 dave]$ ls
- redo01.log redo02.log redo03.log temp01.dbf
- 现在的目录:
- [oracle@qs-dmm-rh2 dave]$ cd /u01/oradata/
- [oracle@qs-dmm-rh2 oradata]$ ls
- control01.ctl control02.ctl control03.ctl sysaux01.dbf system01.dbf undotbs01.dbf users01.dbf
- (1)处理online redo log
- SQL> select group#,bytes/1024/1024||'M',status from v$log;
- GROUP# BYTES/1024/1024||'M' STATUS
- ---------- ----------------------------------------- ----------------
- 1 50M INACTIVE
- 2 50M CURRENT
- 3 50M UNUSED
- SQL> select group#,member from v$logfile;
- GROUP# MEMBER
- ---------- ---------------------------------------------------------------------
- 3 /u01/app/oracle/oradata/dave/redo03.log
- 2 /u01/app/oracle/oradata/dave/redo02.log
- 1 /u01/app/oracle/oradata/dave/redo01.log
- oracle 至少有2组redo log。 所以我们可以将已经完成归档的redo drop掉, 重新创建。
- SQL> alter database drop logfile group 3;
- Database altered.
- SQL> alter database add logfile group 3 ('/u01/oradata/redo03.log') size 50m;
- Database altered.
- SQL> alter system switch logfile;
- System altered.
- SQL> select group#,bytes/1024/1024||'M',status from v$log;
- GROUP# BYTES/1024/1024||'M' STATUS
- ---------- ----------------------------------------- ----------------
- 1 50M INACTIVE
- 2 50M ACTIVE
- 3 50M CURRENT
- SQL> alter database drop logfile group 1;
- Database altered.
- SQL> alter database add logfile group 1 ('/u01/oradata/redo01.log') size 50m;
- Database altered.
- SQL> alter system switch logfile;
- System altered.
- SQL> alter database drop logfile group 2;
- Database altered.
- SQL> alter database add logfile group 2 ('/u01/oradata/redo02.log') size 50m;
- Database altered.
- SQL> select group#,member from v$logfile;
- GROUP# MEMBER
- ---------- ---------------------------------------------------------------------
- 3 /u01/oradata/redo03.log
- 2 /u01/oradata/redo02.log
- 1 /u01/oradata/redo01.log
- (2)处理temp 临时表空间
- SQL> select name from v$tempfile;
- NAME
- --------------------------------------------------------------------------------
- /u01/app/oracle/oradata/dave/temp01.dbf
- --表空间offline
- SQL> alter database tempfile '/u01/app/oracle/oradata/dave/temp01.dbf' offline;
- Database altered.
- --在OS 级别移动temp 的数据文件
- SQL> !mv /u01/app/oracle/oradata/dave/temp01.dbf /u01/oradata/temp01.dbf
- --修改控制文件中temp文件的信息
- SQL> alter database rename file '/u01/app/oracle/oradata/dave/temp01.dbf' to '/u01/oradata/temp01.dbf';
- Database altered.
- --temp 表空间online
- SQL> alter database tempfile '/u01/oradata/temp01.dbf' online;
- Database altered.
- --验证
- SQL> select name from v$tempfile;
- NAME
- --------------------------------------------------------------------------------
- /u01/oradata/temp01.dbf
- 10. NID 修改DBID和DBNAME
- 先查看,这个和我们之前的一样
- SQL> select name,dbid from v$database;
- NAME DBID
- --------- ----------
- DAVE 808234286
- 几点说明:
- (1)在修改DBID期间仍然可能会遇到不可恢复的错误。所以修改之前备份数据库,特使是控制文件。因为nid 会修改控制文件中的信息。
- (2)需要将DB 启动到mount 状态才能修改。
- SQL> shutdown immediate
- SQL> startup mount;
- 在执行NID 命令之前:一定要关闭所有的session连接。
- nid 命令到执行的最后会关闭数据库,如果有session 连接,就会阻止这个操作,修改dbid就会被挂死。如果中断这个操作。修改就会失败,数据库就不能mount。需要恢复。
- (1)只改DBID, 不改db_name
- [oracle@qs-dmm-rh2 trace]$ nid target=sys/oracle
- DBNEWID: Release 11.2.0.1.0 - Production on Fri Mar 11 18:36:33 2011
- Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
- Connected to database DAVE (DBID=808234286)
- Connected to server version 11.2.0
- Control Files in database:
- /u01/oradata/control01.ctl
- /u01/oradata/control02.ctl
- /u01/oradata/control03.ctl
- Change database ID of database DAVE? (Y/[N]) => y
- Proceeding with operation
- Changing database ID from 808234286 to 808418162
- Control File /u01/oradata/control01.ctl - modified
- Control File /u01/oradata/control02.ctl - modified
- Control File /u01/oradata/control03.ctl - modified
- Datafile /u01/app/oracle/oradata/dave/system01.db - dbid changed
- Datafile /u01/app/oracle/oradata/dave/sysaux01.db - dbid changed
- Datafile /u01/app/oracle/oradata/dave/undotbs01.db - dbid changed
- Datafile /u01/app/oracle/oradata/dave/users01.db - dbid changed
- Datafile /u01/app/oracle/oradata/dave/temp01.db - dbid changed
- Control File /u01/oradata/control01.ctl - dbid changed
- Control File /u01/oradata/control02.ctl - dbid changed
- Control File /u01/oradata/control03.ctl - dbid changed
- Instance shut down
- Database ID for database DAVE changed to 808418162.
- All previous backups and archived redo logs for this database are unusable.
- Database has been shutdown, open database with RESETLOGS option.
- Succesfully changed database ID.
- DBNEWID - Completed succesfully.
- 重启打开数据库:
- [oracle@qs-dmm-rh2 ~]$ export ORACLE_SID=dave
- [oracle@qs-dmm-rh2 ~]$ sqlplus / as sysdba;
- SQL*Plus: Release 11.2.0.1.0 Production on Fri Mar 11 18:37:57 2011
- Copyright (c) 1982, 2009, Oracle. All rights reserved.
- Connected to an idle instance.
- SQL> startup
- ORACLE instance started.
- Total System Global Area 196681728 bytes
- Fixed Size 1335444 bytes
- Variable Size 83890028 bytes
- Database Buffers 109051904 bytes
- Redo Buffers 2404352 bytes
- Database mounted.
- ORA-01589: must use RESETLOGS or NORESETLOGS option for database open
- SQL> alter database open resetlogs;
- Database altered.
- SQL> select name,dbid from v$database;
- NAME DBID
- --------- ----------
- DAVE 808418162
- SQL>
- (2)修改DBID 和DB_NAME
- 注意一点,修改DB_NAME 之前,要将spfile 创建成pfile,因为修改dbname之后,原来的参数文件就没用了。所以要保证最新的参数。 还有修改DB_NAME的值为最新值。 修改完之后,然后用这个新参数启动DB.
- [oracle@qs-dmm-rh2 trace]$ nid target=sys/oracle dbname=anqing
- DBNEWID: Release 11.2.0.1.0 - Production on Fri Mar 11 18:41:01 2011
- Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
- Connected to database DAVE (DBID=808418162)
- Connected to server version 11.2.0
- Control Files in database:
- /u01/oradata/control01.ctl
- /u01/oradata/control02.ctl
- /u01/oradata/control03.ctl
- Change database ID and database name DAVE to DBA? (Y/[N]) => y
- Proceeding with operation
- Changing database ID from 808418162 to 1204743549
- Changing database name from DAVE to DBA
- Control File /u01/oradata/control01.ctl - modified
- Control File /u01/oradata/control02.ctl - modified
- Control File /u01/oradata/control03.ctl - modified
- Datafile /u01/app/oracle/oradata/dave/system01.db - dbid changed, wrote new name
- Datafile /u01/app/oracle/oradata/dave/sysaux01.db - dbid changed, wrote new name
- Datafile /u01/app/oracle/oradata/dave/undotbs01.db - dbid changed, wrote new name
- Datafile /u01/app/oracle/oradata/dave/users01.db - dbid changed, wrote new name
- Datafile /u01/app/oracle/oradata/dave/temp01.db - dbid changed, wrote new name
- Control File /u01/oradata/control01.ctl - dbid changed, wrote new name
- Control File /u01/oradata/control02.ctl - dbid changed, wrote new name
- Control File /u01/oradata/control03.ctl - dbid changed, wrote new name
- Instance shut down
- Database name changed to DBA.
- Modify parameter file and generate a new password file before restarting.
- Database ID for database DBA changed to 1204743549.
- All previous backups and archived redo logs for this database are unusable.
- Database has been shutdown, open database with RESETLOGS option.
- Succesfully changed database name and ID.
- DBNEWID - Completed succesfully.
- 验证:
- SQL> select name,dbid from v$database;
- NAME DBID
- --------- ----------
- ANQING 676458969
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