December 1, 2005
我的DBA飞走了
作者:eygle
出处:http://blog.eygle.com
从开始广告再招一名DBA到现在已经快半个月了,结果这个DBA还是没有找到.
前天谈好了的一个朋友,HR约了没有约到,今天告诉我不来了.
只好打开信箱从头开始翻简历.
真是郁闷!
Posted by eygle at 3:30 PM | Comments (15)
Oracle HowTo:如何通过RMAN进行裸设备和文件系统之间的数据文件迁移
作者:eygle
出处:http://blog.eygle.com
因为一个朋友问起，做个范例简单介绍如何使用Rman进行数据文件的裸设备和文件系统转换。1.使用裸设备建立EYGLE测试表空间
[oracle@danaly ~]$ sqlplus "/ as sysdba"
SQL*Plus: Release 10.2.0.1.0 - Production on Wed Nov 30 14:41:53 2005
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, Oracle Label Security, OLAP and Data Mining Scoring Engine options
SQL> create tablespace eygle
2 datafile '/dev/cciss/c0d0p11' size 10M;
Tablespace created.
SQL> create table eygle tablespace eygle as select * from dba_objects;
Table created.
SQL> select count(*) from eygle;
COUNT(*)
----------
50420
SQL> alter tablespace eygle offline;
Tablespace altered.
SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, Oracle Label Security, OLAP and Data Mining Scoring Engine options
|
2.使用RMAN的COPY功能备份裸设备文件为文件系统文件
[oracle@danaly ~]$ rman target / Recovery Manager: Release 10.2.0.1.0 - Production on Wed Nov 30 16:00:42 2005 Copyright (c) 1982, 2005, Oracle. All rights reserved. connected to target database: DANALY (DBID=3965153484) RMAN> copy datafile '/dev/cciss/c0d0p11' to '/opt/oracle/eygle01.dbf'; Starting backup at 30-NOV-05 using target database control file instead of recovery catalog allocated channel: ORA_DISK_1 channel ORA_DISK_1: sid=137 devtype=DISK channel ORA_DISK_1: starting datafile copy input datafile fno=00002 name=/dev/cciss/c0d0p11 output filename=/opt/oracle/eygle01.dbf tag=TAG20051130T160137 recid=2 stamp=575740898 channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:02 Finished backup at 30-NOV-05 RMAN> exit Recovery Manager complete. |
3.通过rename修改文件位置
[oracle@danaly ~]$ sqlplus "/ as sysdba" SQL*Plus: Release 10.2.0.1.0 - Production on Wed Nov 30 16:01:54 2005 Copyright (c) 1982, 2005, Oracle. All rights reserved. Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production With the Partitioning, Oracle Label Security, OLAP and Data Mining Scoring Engine options SQL> alter database rename file '/dev/cciss/c0d0p11' to '/opt/oracle/eygle01.dbf'; Database altered. SQL> alter tablespace eygle online; Tablespace altered. SQL> select file_name from dba_data_files where tablespace_name='EYGLE'; FILE_NAME -------------------------------------------------------------------------------- /opt/oracle/eygle01.dbf |
4.进行数据修改
SQL> insert into eygle as select * from eygle;
insert into eygle as select * from eygle
*
ERROR at line 1:
ORA-00926: missing VALUES keyword
SQL> insert into eygle select * from eygle;
insert into eygle select * from eygle
*
ERROR at line 1:
ORA-01653: unable to extend table SYS.EYGLE by 128 in tablespace EYGLE
SQL> alter database datafile '/opt/oracle/eygle01.dbf' resize 20m;
Database altered.
SQL> insert into eygle select * from eygle;
50420 rows created.
SQL> commit;
Commit complete.
SQL> alter tablespace eygle offline;
Tablespace altered.
SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, Oracle Label Security, OLAP and Data Mining Scoring Engine options
|
5.从文件系统迁移文件至裸设备
[oracle@danaly ~]$ rman target /
Recovery Manager: Release 10.2.0.1.0 - Production on Wed Nov 30 16:08:51 2005
Copyright (c) 1982, 2005, Oracle. All rights reserved.
connected to target database: DANALY (DBID=3965153484)
RMAN> copy datafile '/opt/oracle/eygle01.dbf' to '/dev/cciss/c0d0p11';
Starting backup at 30-NOV-05
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=135 devtype=DISK
channel ORA_DISK_1: starting datafile copy
input datafile fno=00002 name=/opt/oracle/eygle01.dbf
output filename=/dev/cciss/c0d0p11 tag=TAG20051130T160935 recid=3 stamp=575741376
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:01
Finished backup at 30-NOV-05
RMAN> exit
Recovery Manager complete.
[oracle@danaly ~]$ sqlplus "/ as sysdba"
SQL*Plus: Release 10.2.0.1.0 - Production on Wed Nov 30 16:09:48 2005
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, Oracle Label Security, OLAP and Data Mining Scoring Engine options
SQL> alter database rename file '/opt/oracle/eygle01.dbf' to '/dev/cciss/c0d0p11';
Database altered.
SQL> alter tablespace eygle online;
Tablespace altered.
SQL> select count(*) from eygle;
COUNT(*)
----------
100840
SQL>
|
rman使得对于裸设备的操作大大简化。
Posted by eygle at 7:01 AM | Comments (3)