Oracle DB 使用RMAN将数据库移植到ASM存储区

1. 完全关闭数据库。

2. 关闭数据库并修改服务器参数文件，以使用Oracle Managed Files (OMF)。

3. 编辑并执行以下RMAN 脚本：

STARTUP NOMOUNT;

RESTORE CONTROLFILE FROM '/u1/c1.ctl';

ALTER DATABASE MOUNT;

BACKUP AS COPY DATABASE FORMAT '+dgroup1';

SWITCH DATABASE TO COPY;

SQL "ALTER DATABASE RENAME '/u1/log1'TO '+dgroup1' ";

# Repeat RENAME command for all online redo log members

...

ALTER DATABASE OPEN RESETLOGS;

SQL "ALTER DATABASE TEMPFILE '/u1/temp1' DROP";

 

 

• 将数据库移植到ASM 存储区

由于ASM 文件无法通过正常的操作系统界面访问，因此RMAN 是复制ASM 文件的唯一途径。虽然由于表空间的历史原因，表空间中的文件既可以是ASM 文件，也可以

是非ASM 文件，但是RMAN 命令会将非ASM 文件移到ASM 磁盘组中。通过以下过程，可以将整个数据库移到ASM 磁盘组中：（假定你使用的是服务器参数文件。）

1. 使用V$CONTROLFILE和V$LOGFILE，获取当前控制文件和联机重做日志的文件名。

2. 像平常一样关闭数据库。按如下所述，修改数据库的服务器参数文件：

- 将必要的OMF 目标参数设置为所需的ASM 磁盘组。

- 删除CONTROL_FILES参数。

3. 编辑和运行RMAN 命令文件，这将备份数据库、将当前数据文件移到备份中并重命名联机重做日志。使用BACKUP AS COPY命令只能移动表空间或数据文件。

4. 删除旧的数据库文件。

注：如果创建一个OMF 控制文件，并且有一个服务器参数文件，则会在该服务器参数文件中创建一个CONTROL_FILES初始化参数条目。

 

 

• 将表空间移植到ASM 存储中

移植表空间，使其可以使用ASM 存储。

1. 使用SQL*Plus，以 SYSDBA 用户身份连接到数据库实例，然后创建一个名为TBSASMMIG 的新的表空间。此表空间应当只包含一个存储于文件系统中的10 MB 

大小的文件（不使用ASM）。请确保连接的是 test0924（我本机的测试实例）实例，而不是ASM 实例。

2. 创建一个名为 T2、存储在新的表空间 TBSASMMIG 中的表。在 T2 中插入一行。 提交你所做的操作。

3. 将 TBSASMMIG 移植到ASM 存储中。完成操作后，请检查移植是否成功，并且该表空间中的表是否保持原样。

sys@TEST0924> select  FILE_NAME,TABLESPACE_NAME from dba_data_files;

FILE_NAME                                          TABLESPACE_NAME
-------------------------------------------------- ------------------------------
/u01/app/oracle/oradata/test0924/users01.dbf       USERS
/u01/app/oracle/oradata/test0924/sysaux01.dbf      SYSAUX
/u01/app/oracle/oradata/test0924/system01.dbf      SYSTEM
/u01/app/oracle/oradata/test0924/example01.dbf     EXAMPLE
/u01/app/oracle/oradata/test0924/undotbs01.dbf     UNDOTBS1

sys@TEST0924> create tablespace TBSASMMIG datafile '/u01/app/oracle/oradata/test0924/tbsasmmig01.dbf' size 10m;

Tablespace created.

sys@TEST0924> create table t2 (id number,name varchar2(20)) tablespace TBSASMMIG;

Table created.

sys@TEST0924> insert into t2 values (1,'a1');

1 row created.

sys@TEST0924> commit;

Commit complete.

sys@TEST0924> select file_id,file_name,tablespace_name from dba_data_files;

   FILE_ID FILE_NAME                                          TABLESPACE_NAME
---------- -------------------------------------------------- ------------------------------
         4 /u01/app/oracle/oradata/test0924/users01.dbf       USERS
         3 /u01/app/oracle/oradata/test0924/tbsasmmig01.dbf   TBSASMMIG
         2 /u01/app/oracle/oradata/test0924/sysaux01.dbf      SYSAUX
         1 /u01/app/oracle/oradata/test0924/system01.dbf      SYSTEM
         5 /u01/app/oracle/oradata/test0924/example01.dbf     EXAMPLE
         9 /u01/app/oracle/oradata/test0924/undotbs01.dbf     UNDOTBS1

6 rows selected.

[oracle@rtest ~]$ rman target /

Recovery Manager: Release 11.2.0.3.0 - Production on Sun Nov 3 17:02:51 2013

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

connected to target database: TEST0924 (DBID=2720875862)

RMAN> sql 'alter database datafile 3 offline';

sql statement: alter database datafile 3 offline

RMAN> backup as copy datafile 3 format '+DATA';

Starting backup at 03-NOV-13
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=127 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=191 device type=DISK
allocated channel: ORA_DISK_3
channel ORA_DISK_3: SID=157 device type=DISK
channel ORA_DISK_1: starting datafile copy
input datafile file number=00003 name=/u01/app/oracle/oradata/test0924/tbsasmmig01.dbf
output file name=+DATA/test0924/datafile/tbsasmmig.264.830538365 tag=TAG20131103T170603 RECID=13 STAMP=830538366
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:07
Finished backup at 03-NOV-13

Starting Control File and SPFILE Autobackup at 03-NOV-13
piece handle=/u01/app/oracle/fast_recovery_area/TEST0924/autobackup/2013_11_03/o1_mf_s_830538370_97fl6mr9_.bkp comment=NONE
Finished Control File and SPFILE Autobackup at 03-NOV-13

RMAN> switch datafile 3 to copy;

datafile 3 switched to datafile copy "+DATA/test0924/datafile/tbsasmmig.264.830538365"

RMAN> recover datafile 3;

Starting recover at 03-NOV-13
using channel ORA_DISK_1
using channel ORA_DISK_2
using channel ORA_DISK_3

starting media recovery
media recovery complete, elapsed time: 00:00:00

Finished recover at 03-NOV-13

RMAN> sql 'alter database datafile 3 online';

sql statement: alter database datafile 3 online


sys@TEST0924> select file_id,file_name,tablespace_name from dba_data_files;

   FILE_ID FILE_NAME                                          TABLESPACE_NAME
---------- -------------------------------------------------- ------------------------------
         4 /u01/app/oracle/oradata/test0924/users01.dbf       USERS
         3 +DATA/test0924/datafile/tbsasmmig.264.830538365    TBSASMMIG
         2 /u01/app/oracle/oradata/test0924/sysaux01.dbf      SYSAUX
         1 /u01/app/oracle/oradata/test0924/system01.dbf      SYSTEM
         5 /u01/app/oracle/oradata/test0924/example01.dbf     EXAMPLE
         9 /u01/app/oracle/oradata/test0924/undotbs01.dbf     UNDOTBS1

6 rows selected.

sys@TEST0924> select * from t2
  2  ;

        ID NAME
---------- --------------------
         1 a1

 

另一种转换方法：

RMAN> backup tablespace users;

Starting backup at 24-OCT-13
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=163 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=226 device type=DISK
allocated channel: ORA_DISK_3
channel ORA_DISK_3: SID=9 device type=DISK
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00004 name=/u01/app/oracle/oradata/test0924/users01.dbf
channel ORA_DISK_1: starting piece 1 at 24-OCT-13
channel ORA_DISK_1: finished piece 1 at 24-OCT-13
piece handle=/u01/app/oracle/fast_recovery_area/TEST0924/backupset/2013_10_24/o1_mf_nnndf_TAG20131024T101748_96lc0dxh_.bkp tag=TAG20131024T101748 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:07
Finished backup at 24-OCT-13

Starting Control File and SPFILE Autobackup at 24-OCT-13
piece handle=/u01/app/oracle/fast_recovery_area/TEST0924/autobackup/2013_10_24/o1_mf_s_829649875_96lc0obm_.bkp comment=NONE
Finished Control File and SPFILE Autobackup at 24-OCT-13

RMAN> run
2> {sql 'alter tablespace users offline immediate';
3> set newname for datafile 4 to '+DATA';
4> restore tablespace users;
5> switch datafile 4;
6> recover tablespace users;
7> sql 'alter tablespace users online';
8> }

sql statement: alter tablespace users offline immediate

executing command: SET NEWNAME

Starting restore at 24-OCT-13
using channel ORA_DISK_1
using channel ORA_DISK_2
using channel ORA_DISK_3

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 +DATA
channel ORA_DISK_1: reading from backup piece /u01/app/oracle/fast_recovery_area/TEST0924/backupset/2013_10_24/o1_mf_nnndf_TAG20131024T101748_96lc0dxh_.bkp
channel ORA_DISK_1: piece handle=/u01/app/oracle/fast_recovery_area/TEST0924/backupset/2013_10_24/o1_mf_nnndf_TAG20131024T101748_96lc0dxh_.bkp tag=TAG20131024T101748
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:07
Finished restore at 24-OCT-13

datafile 4 switched to datafile copy
input datafile copy RECID=6 STAMP=829650049 file name=+DATA/test0924/datafile/users.260.829650045

Starting recover at 24-OCT-13
using channel ORA_DISK_1
using channel ORA_DISK_2
using channel ORA_DISK_3

starting media recovery
media recovery complete, elapsed time: 00:00:01

Finished recover at 24-OCT-13

sql statement: alter tablespace users online



sys@TEST0924> select file_name from dba_data_files;

FILE_NAME
----------------------------------------------------------------------------------------------------
+DATA/test0924/datafile/users.260.829650045
/u01/app/oracle/oradata/test0924/sysaux01.dbf
/u01/app/oracle/oradata/test0924/system01.dbf
/u01/app/oracle/oradata/test0924/example01.dbf
/u01/app/oracle/oradata/test0924/undotbs02.dbf
/u01/app/oracle/oradata/test0924/undotbs01.dbf
/u01/app/oracle/oradata/test0924/inventory01.dbf

7 rows selected.