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HomeDatabaseMysql TutorialEXP/IMP迁移数据

EXP/IMP对于小数据量的数据库,是一个不错的迁移工具。 迁移数据过程如下,分两大步,导出和导入。

项目背景:

原来的数据库服务器运行在HP DL388G7服务器上面,内存32G,,由于业务增长,内存吃紧,加上时不时出现服务器硬件故障,由于是单实例单服务器,存在单点发现,于是打算采取一些措施改善一下:

1)升级服务器内存

2)并搭建服务器操作系统级别的双机

3)迁移数据库数据到新服务器

前面已经写过升级服务器内存相关的文章,题目为“数据库服务器升级内存需要考虑的问题”,链接如下:

——————————————————————————————————————————————————————————

 

EXP/IMP对于小数据量的数据库,是一个不错的迁移工具。 迁移数据过程如下,分两大步,导出和导入。

 

一、导出过程 1、准备好导出脚本:

more / exp20130118/exp.sh

date

expdp bv/bv32EBAI2 DIRECTORY=DATA_PUMP_DIR2 DUMPFILE=exp_2013-1-19.dmp LOGFILE=exp_2013-1-19.log SCHEMAS=bv

date

 

2、创建导出目录:

exp目标目录放在本地还是存储,放哪个目录?是否创建directory

SQL> select * from dba_directories;

OWNER DIRECTORY_NAME DIRECTORY_PATH

SYS DATA_PUMP_DIR /Oracle/product/10.2/db/rdbms/log/

SYS DATA_PUMP_DIR1 /exp

SYS ORACLE_OCM_CONFIG_DIR /oracle/product/10.2/db/ccr/state

 

create directory data_pump_dir2 as ' /exp20130118';

3、导出dmp文件

找一个业务不繁忙的时间,执行导出脚本即可。

 

二、导入过程 1、创建表空间、用户

说明:

1google网上大多数文章都说,如果用exp/imp方式迁移数据,在新服务器上,只需要创建一个用户用于导入就可以,但是我第一次导入时只创建一个用户,就会报一大堆错,最后还是创建所有用户,知道的同学告诉我一声,谢谢。

2)我这里偷点懒,直接用toad拷贝创建用户的语句,连加密的密码也有了,方便。

 

Toad里边拷贝创建表空间和用户的脚本,直接粘贴进行初始化准备工作。表空间主要是看看和用户相关的都有哪些表空间,可以用sql语句查询;用户就得一个一个看。

 

11创建一个参数文件

CREATE PROFILE LIMIT_SESSION LIMIT

SESSIONS_PER_USER 30

CPU_PER_SESSION DEFAULT

CPU_PER_CALL DEFAULT

CONNECT_TIME DEFAULT

IDLE_TIME DEFAULT

LOGICAL_READS_PER_SESSION DEFAULT

LOGICAL_READS_PER_CALL DEFAULT

COMPOSITE_LIMIT DEFAULT

PRIVATE_SGA DEFAULT

FAILED_LOGIN_ATTEMPTS DEFAULT

PASSWORD_LIFE_TIME DEFAULT

PASSWORD_REUSE_TIME DEFAULT

PASSWORD_REUSE_MAX DEFAULT

PASSWORD_LOCK_TIME DEFAULT

PASSWORD_GRACE_TIME DEFAULT

PASSWORD_VERIFY_FUNCTION DEFAULT;

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