背景介绍>利用db_link直接pump抽取，减少转储文件集。
前提： 授权> grant create public database link,create database link to myAccount;
1.创建dblink
SQL> create database link demob connect to dblink identified by dblink using '(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = 10.100.25.14)(PORT = 1521))(CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = orcl)))';
Database link created.
参数说明>
demob --link_name
dblink -- 远程数据库的用户账号与密码
(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = 10.100.25.14)(PORT = 1521))(CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = orcl))) -- 远程数据库的tnsnames.ora
------------------------------------------------------------------------------------------------------------------------------
2.使用dblink
SQL> select * from dblink.dblink@demob;
ID
----------
1
2
参数说明
@demob --dblink_name
___________________________________________________________________________________________________
3.远程数据库（要被导出数据库）授权
SQL> grant exp_full_database to dblink;
Grant succeeded.
SQL>grant imp_full_database to dblink;
Grant succeeded.
——————————————————————————————————————————————————————————————
4.在导入数据库中创建parfile文件。
[oracle@11g ~]$ pwd
/home/oracle
[oracle@11g ~]$ ls
app database imp.txt oradiag_oracle oraInventory
[oracle@11g ~]$ cat imp.txt
network_link=demob （db_link的名字）
schemas=dblink （要被导入用户名）
————————————————————————————————————————————————————————————————
5.目标数据库进行导入。
[oracle@11g ~]$ impdp \'sys/oracle as sysdba\' parfile=/home/oracle/imp.txt
Import: Release 11.2.0.1.0 - Production on Fri Oct 17 15:13:07 2014
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
FLASHBACK automatically enabled to preserve database integrity.
Starting "SYS"."SYS_IMPORT_SCHEMA_01": "sys/******** AS SYSDBA" parfile=/home/oracle/imp.txt
Estimate in progress using BLOCKS method...
Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 64 KB
Processing object type SCHEMA_EXPORT/USER
Processing object type SCHEMA_EXPORT/SYSTEM_GRANT
Processing object type SCHEMA_EXPORT/ROLE_GRANT
Processing object type SCHEMA_EXPORT/DEFAULT_ROLE
Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA
Processing object type SCHEMA_EXPORT/TABLE/TABLE
. . imported "DBLINK"."DBLINK" 2 rows
Job "SYS"."SYS_IMPORT_SCHEMA_01" successfully completed at 15:14:05
———————————————————————————————————————————————————————————————————————————————
6.登录检查
[oracle@11g ~]$ sqlplus dblink/dblink
SQL*Plus: Release 11.2.0.1.0 Production on Fri Oct 17 15:14:46 2014
Copyright (c) 1982, 2009, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
成功结束。
