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本文通过实践演示，完整模拟一下使用 EXPDP/IMPDP 工具实现传输表空间的过程，供参考。
任务描述：将 secdb1 实例上的 sec 用户表空间 tbs_sec 的数据传输到 secdb2 实例上 secooler 用户下。
1.secdb1 实例环境准备
1）创建待操作的表空间
sys@secdb1> create tablespace tbs_sec datafile ‘/u01/app/Oracle/oradata/secdb1/dfile/tbs_sec_01.dbf’ size 5 m autoextend on;
Tablespace created.
2）重新创建 sec 用户并授权
sys@secdb1> drop user sec cascade;
User dropped.
sys@secdb1> create user sec identified by sec default tablespace tbs_sec;
User created.
sys@secdb1> grant connect,resource to sec;
Grant succeeded.
3）在 sec 用户下简单创建一张表并初始化一条记录
sys@secdb1> conn sec/sec
Connected.
sec@secdb1> create table t(x int);
Table created.
sec@secdb1> insert into t values (1);
1 row created.
sec@secdb1> commit;
Commit complete.
sec@secdb1> select * from t;
X
———-
1
2. 检 tbs_sec 表空间是否“自包含”
sys@secdb1> EXECUTE DBMS_TTS.TRANSPORT_SET_CHECK(‘tbs_sec’,true);
PL/SQL procedure successfully completed.
sys@secdb1> SELECT * FROM TRANSPORT_SET_VIOLATIONS;
no rows selected
OK，没有问题。
3. 将表空间调整到只读状态
sys@secdb1> ALTER TABLESPACE tbs_sec read only;
Tablespace altered.
4. 使用 EXPDP 工具完成表空间元素据导出
sys@secdb1> create directory dir_home as ‘/home/oracle’;
Directory created.
sys@secdb1> grant read,write on directory dir_home to public;
Grant succeeded.
[oracle@seclinux ~]$ expdp system/oracle1 directory=dir_home dumpfile=tbs_sec.dmp transport_tablespaces=tbs_sec transport_full_check=y
Export: Release 10.2.0.1.0 – Production on Saturday, 23 July, 2010 22:23:21
Copyright (c) 2003, 2005, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 – Production
With the Partitioning, OLAP and Data Mining options
Starting “SYSTEM”.”SYS_EXPORT_TRANSPORTABLE_01″: system/******** directory=dir_home dumpfile=tbs_sec.dmp transport_tablespaces=tbs_sec transport_full_check=y
Processing object type TRANSPORTABLE_EXPORT/PLUGTS_BLK
Processing object type TRANSPORTABLE_EXPORT/TABLE
Processing object type TRANSPORTABLE_EXPORT/POST_INSTANCE/PLUGTS_BLK
Master table “SYSTEM”.”SYS_EXPORT_TRANSPORTABLE_01″ successfully loaded/unloaded
******************************************************************************
Dump file set for SYSTEM.SYS_EXPORT_TRANSPORTABLE_01 is:
/home/oracle/tbs_sec.dmp
Job “SYSTEM”.”SYS_EXPORT_TRANSPORTABLE_01″ successfully completed at 22:23:39
5. 将 tbs_sec 表空间对应的数据文件拷贝到 secdb2 实例对应的目录
[oracle@seclinux ~]$ cp /u01/app/oracle/oradata/secdb1/dfile/tbs_sec_01.dbf /u01/app/oracle/oradata/secdb2/tbs_sec_01.dbf
6. 在 secdb2 实例上使用 IMPDP 工具完成表空间的导入
sys@secdb2> create user secooler identified by secooler;
User created.
sys@secdb2> grant connect,resource to secooler;
Grant succeeded.
sys@secdb2> create directory dir_home as ‘/home/oracle’;
Directory created.
sys@secdb2> grant read,write on directory dir_home to public;
Grant succeeded.
[oracle@seclinux ~]$ impdp system/oracle1 DUMPFILE=tbs_sec.dmp DIRECTORY=dir_home TRANSPORT_DATAFILES=/u01/app/oracle/oradata/secdb2/tbs_sec_01.dbf REMAP_SCHEMA=(sec:secooler)
Import: Release 10.2.0.1.0 – Production on Saturday, 23 July, 2010 22:34:48
Copyright (c) 2003, 2005, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 – Production
With the Partitioning, OLAP and Data Mining options
Master table “SYSTEM”.”SYS_IMPORT_TRANSPORTABLE_01″ successfully loaded/unloaded
Starting “SYSTEM”.”SYS_IMPORT_TRANSPORTABLE_01″: system/******** DUMPFILE=tbs_sec.dmp DIRECTORY=dir_home TRANSPORT_DATAFILES=/u01/app/oracle/oradata/secdb2/tbs_sec_01.dbf REMAP_SCHEMA=(sec:secooler)
Processing object type TRANSPORTABLE_EXPORT/PLUGTS_BLK
Processing object type TRANSPORTABLE_EXPORT/TABLE
Processing object type TRANSPORTABLE_EXPORT/POST_INSTANCE/PLUGTS_BLK
Job “SYSTEM”.”SYS_IMPORT_TRANSPORTABLE_01″ successfully completed at 22:34:52
7. 在 secdb2 实例上验证数据导入效果
sys@secdb2> conn secooler/secooler
Connected.
secooler@secdb2> select * from cat;
TABLE_NAME TABLE_TYPE
—————————— ———–
T TABLE
secooler@secdb2> select * from t;
X
———-
1
sys@secdb2> select owner,tablespace_name from dba_tables where wner=’SECOOLER’ and table_name=’T’;
OWNER TABLESPACE_NAME
—————————— ——————————
SECOOLER TBS_SEC
OK，使命完成。
8. 最后记得将 secdb1 实例中 tbs_sec 表空间置为可读写模式
sys@secdb1> ALTER TABLESPACE tbs_sec read write;
Tablespace altered.
9. 小结
使用 EXPDP/IMPDP 传输表空间功能可以比较便捷高效的完成数据迁移，善用之。
有关使用 EXP/IMP 工具完成传输表空间的操作方法，请参考如下文章，大同小异。
《【实验】利用可传输表空间技术实现数据的高效迁移》（http://www.linuxidc.com/Linux/2016-08/133898.htm）
更多 Oracle 相关信息见Oracle 专题页面 http://www.linuxidc.com/topicnews.aspx?tid=12
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