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使用可传输表空间的特性复制数据

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Jun 07, 2016 pm 05:05 PM

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可传输表空间的限制：传输表空间技术不能应用于system表空间或sys用户拥有的对象。在传输表空间中，要求表空间为自包含的，自包含

可传输表空间的限制：传输表空间技术不能应用于system表空间或sys用户拥有的对象。在传输表空间中，要求表空间为自包含的，自包含表示用于传输的内部表空间集没有引用指向外部表空间集。

可传输表空间实验环境

OS IP SID 存储方式表空间用户表

源数据库 RedHat5.4 10.10.10.8 orcl 文件系统 tb1，tb2 u1，u2

t1，t2

目标数据库 redhat5.4 10.10.10.7 orcl ASM —— u1，u2 ——

说明：在源数据库上用户u1使用的是tb1表空间，里面有一张t1表。使用exp/imp来传输；在源数据库上用户u2使用的是tb2表空间，里面有一张t2表。使用expdp/impdp来传输。

下面给出创建测试环境的脚本（源数据库上面执行的操作）

可传输表空间实战

1.确认要传输表空间的平台是否兼容（源数据库和目标数据库上面都一样，因为都是redhat5.4的OS）

2.确认传输的表空间是否自包含（源数据库上面执行的操作）

说明：严格方式不只检查表空间集引用的对象（比如表）是否自包含，同时会检查被其它表空间引用的对象(比如索引等)，引用者是否在表空间集中。如果待传输表空间是非自包含，可以将多个表空间一起传输。

3.将待传输表空间设置为只读（源数据库上面执行的操作）

4.导出表空间集元数据（源数据库上面执行的操作）

5.转换字节顺序，如果两个平台的字节顺序不一样，中间需要一个转换过程，可以使用rman。（可选操作，，这里并没有执行。）

说明：这就是第一步检查的目的，虽然这里并不需要转换。这里给出的只是转换的方法。

6.复制元数据和数据文件到目标数据库（目标数据库上面执行的操作）

7.修改源数据库的表空间为读写（源数据库上面执行的操作）

8.检查源表空间和目标数据库的块大小是否一样

源数据库

目标数据库

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