使用imp/impdb和管道实现数据库的快速迁移-Mysql Tutorial-php.cn

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使用imp/impdb和管道实现数据库的快速迁移

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Jun 07, 2016 pm 05:20 PM

A、使用impdp和network_link 1,在目标数据库创建 db linkcreate public database link hrtestdb connect to system identified

A、使用impdp和network_link

1,在目标数据库创建 db link
create public database link hrtestdb connect to system identified by 1234 using 'hrtestdb';

impdp system/1234 network_link=hrtestdb schemas=BMCCZHPUSR;

2,在目标库创建相关表空间，防止导入报错

3，，impdp导入

不同用户之间的导入使用remap_schema参数
impdp wj/wj#201209 network_link=hrtestdb schemas=BMCCZHPUSR remap_schema=BMCCZHPUSR:wj

B、使用imp和管道技术
如果涉及9i及以下版本，没有expdp命令，只有export命令，就需要手工创建管道来实现

具体过程如下
1，新建管道

mknod /tmp/exp.pipe p

2,exp导出数据，此时命令会停止，等待imp命令
exp system/1234 file=/tmp/exp.pipe tables=BMCCZHPUSR.RESUME_STUDY

3，本机上运行imp命令，导入数据到目标数据库
imp wj/wj@epmdb file=/tmp/exp.pipe BUFFER=159715200 IGNORE=Y COMMIT=Y FROMUSER=BMCCZHPUSR touser=wj;

4，删除管道文件
rm –rf /tmp/exp.pipe

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