利用rman copy的方法實現儲存上裸裝置資料檔案的遷移
背景:有時為了應用的需要，不得不把一些裸裝置資料檔案遷移到新的儲存上或者更快的儲存上來滿足應用的要求。
下面就是實驗來測試控制檔案，資料檔案，臨時資料檔案，redo檔案遷移到新的儲存方法

原庫存放環境
[oracle@single ~]$ sqlplus "/as sysdba"

SQL*Plus: Release 10.2.0.3.0 - Production on 星期三 5月 6 02:56:14 2009

SQL> select name from v$controlfile;

NAME
--------------------------------------------------------------------------------
/dev/raw/raw2
/dev/raw/raw3

SQL> select name from v$datafile;

NAME
--------------------------------------------------------------------------------
/dev/raw/raw7
/dev/raw/raw11
/dev/raw/raw10
/dev/raw/raw9

SQL> select name from v$tempfile;

NAME
--------------------------------------------------------------------------------
/dev/raw/raw8

SQL> select member from v$logfile;

MEMBER
--------------------------------------------------------------------------------
/dev/raw/raw4
/dev/raw/raw5

1.建好和原來裸裝置一樣大小的lv，建議比原來lv大一些配製好許可權屬性為oracle:dba
1.1原來儲存的控制檔案     新儲存的控制檔案
   /dev/raw/raw2            /dev/raw/raw22
   /dev/raw/raw3            /dev/raw/raw3
1.2原來儲存的資料檔案     新儲存的資料檔案
   /dev/raw/raw7            /dev/raw/raw27
   /dev/raw/raw11           /dev/raw/raw31
   /dev/raw/raw10           /dev/raw/raw30
   /dev/raw/raw9            /dev/raw/raw29
1.3原來儲存的日誌檔案    新儲存的日誌檔案
   /dev/raw/raw4            /dev/raw/raw24
   /dev/raw/raw5            /dev/raw/raw25
1.4原來儲存的臨時檔案    新儲存的臨時檔案
   /dev/raw/raw8            /dev/raw/raw28

2. 遷移資料檔案到新的儲存上

2.1 啟動資料庫到mount狀態
SQL> startup mount
ORACLE instance started.

Total System Global Area 192937984 bytes
Fixed Size                  1260840 bytes
Variable Size              67109592 bytes
Database Buffers          121634816 bytes
Redo Buffers                2932736 bytes
Database mounted.
SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Production
With the Partitioning, OLAP and Data Mining options

2.2 用rman target /方式進入
[oracle@single ~]$ rman target /

Recovery Manager: Release 10.2.0.3.0 - Production on 星期三 5月 6 03:24:27 2009

connected to target database: ORCL (DBID=1213870770, not open)

RMAN> copy datafile '/dev/raw/raw7' to '/dev/raw/raw27';

Starting backup at 06-5月 -09
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: starting datafile copy
input datafile fno=00001 name=/dev/raw/raw7
output filename=/dev/raw/raw27 tag=TAG20090506T032607 recid=1 stamp=686114794
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:35
Finished backup at 06-5月 -09

RMAN> copy datafile '/dev/raw/raw9' to '/dev/raw/raw29';

Starting backup at 06-5月 -09
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
input datafile fno=00004 name=/dev/raw/raw9
output filename=/dev/raw/raw29 tag=TAG20090506T032716 recid=2 stamp=686114837
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:02
Finished backup at 06-5月 -09

RMAN> copy datafile '/dev/raw/raw10' to '/dev/raw/raw30';

Starting backup at 06-5月 -09
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
input datafile fno=00003 name=/dev/raw/raw10
output filename=/dev/raw/raw30 tag=TAG20090506T032746 recid=3 stamp=686114875
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:16
Finished backup at 06-5月 -09

RMAN> copy datafile '/dev/raw/raw11' to '/dev/raw/raw31';

Starting backup at 06-5月 -09
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
input datafile fno=00002 name=/dev/raw/raw11
output filename=/dev/raw/raw31 tag=TAG20090506T032822 recid=4 stamp=686114915
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:15
Finished backup at 06-5月 -09

RMAN>

2.3 進入sqlplus,更改檔名寫入到控制檔案中

[oracle@single ~]$ sqlplus "/as sysdba"

SQL*Plus: Release 10.2.0.3.0 - Production on 星期三 5月 6 03:29:28 2009

Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Production
With the Partitioning, OLAP and Data Mining options

SQL> alter database rename file '/dev/raw/raw7' to '/dev/raw/raw27';

Database altered.

SQL> alter database rename file '/dev/raw/raw9' to '/dev/raw/raw29';

Database altered.

SQL> alter database rename file '/dev/raw/raw10' to '/dev/raw/raw30';

Database altered.

SQL> alter database rename file '/dev/raw/raw11' to '/dev/raw/raw31';

Database altered.

SQL> select name from v$datafile;

NAME
--------------------------------------------------------------------------------
/dev/raw/raw27
/dev/raw/raw31
/dev/raw/raw30
/dev/raw/raw29

SQL> alter database open;

Database altered.

SQL>

遷移資料檔案到新的儲存上成功

3.遷移控制檔案到新的儲存上

3.1.備份控制檔案
startup mount
RMAN> backup current controlfile format '/home/oracle/crontrol.bak';

Starting backup at 06-5月 -09
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: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
including current control file in backupset
channel ORA_DISK_1: starting piece 1 at 06-5月 -09
channel ORA_DISK_1: finished piece 1 at 06-5月 -09
piece handle=/home/oracle/crontrol.bak tag=TAG20090506T033405 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:05
Finished backup at 06-5月 -09

3.2.關閉庫修改控制檔案引數檔案
sqlplus "/as sysdba"
shutdown immediate
create pfile from spfile;
[oracle@single dbs]$ vi initorcl.ora

###########################################
control_files=("/dev/raw/raw22", "/dev/raw/raw23")
指向新的引數檔案lv,並且儲存

create spfile from pfile;
QL> startup nomount;
ORACLE instance started.

Total System Global Area 192937984 bytes
Fixed Size                  1260840 bytes
Variable Size              67109592 bytes
Database Buffers          121634816 bytes
Redo Buffers                2932736 bytes
SQL> show parameter cont

NAME                                 TYPE
------------------------------------ ----------------------
VALUE
------------------------------
control_file_record_keep_time        integer
7
control_files                        string
/dev/raw/raw22, /dev/raw/raw23
global_context_pool_size             string

3.3恢復控制檔案到新的儲存上,並且mount和用resetlogs方式開啟資料庫
[oracle@single dbs]$ rman target /

Recovery Manager: Release 10.2.0.3.0 - Production on 星期三 5月 6 03:38:47 2009

connected to target database: orcl (not mounted)

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

Starting restore at 06-5月 -09
using channel ORA_DISK_1

channel ORA_DISK_1: restoring control file
channel ORA_DISK_1: restore complete, elapsed time: 00:00:04
output filename=/dev/raw/raw22
output filename=/dev/raw/raw23
Finished restore at 06-5月 -09

RMAN> alter database mount;

database mounted
released channel: ORA_DISK_1

RMAN> alter database open resetlogs;

database opened

[oracle@single dbs]$ sqlplus "/as sysdba"

SQL*Plus: Release 10.2.0.3.0 - Production on 星期三 5月 6 03:42:02 2009

Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Production
With the Partitioning, OLAP and Data Mining options

SQL> select name from v$controlfile;

NAME
--------------------------------------------------------------------------------
/dev/raw/raw22
/dev/raw/raw23

可以看到控制檔案遷移到新的儲存上已經成功

4.遷移redo檔案到新的儲存上

SQL>alter database add logfile '/dev/raw/raw24' size 50m;

Database altered.

SQL>alter database add logfile '/dev/raw/raw25' size 50m;

Database altered.
QL> alter database drop logfile group 1;

Database altered.

SQL> alter system switch logfile;

System altered.

SQL> alter system switch logfile;

System altered.

SQL> alter database drop logfile group 2;

Database altered.

SQL> select member from v$logfile;

MEMBER
--------------------------------------------------------------------------------
/dev/raw/raw24
/dev/raw/raw25

SQL>

可以看到redo已經遷移到新的儲存上

5.遷移臨時資料檔案

SQL> create TEMPORARY TABLESPACE temp1 tempfile '/oradata/temp01.dbf' size 50m;

Tablespace created.

alter database default temporary tablespace TEMP1;

drop TABLESPACE TEMP;

CREATE TEMPORARY TABLESPACE TEMP TEMPFILE
'/dev/raw/raw28' SIZE 500M AUTOEXTEND OFF
EXTENT MANAGEMENT LOCAL UNIFORM. SIZE 1M
BLOCKSIZE 8K;

SQL> alter database default temporary tablespace TEMP;

Database altered.

SQL> drop tablespace temp1;

Tablespace dropped.

SQL> select name from v$tempfile;

NAME
--------------------------------------------------------------------------------
/dev/raw/raw28

SQL>

可以看到臨時資料檔案已經遷移到新的儲存上

RMAN COPY實現ORACLE資料庫儲存遷移的方案

RMAN COPY實現ORACLE資料庫儲存遷移的方案

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