Import Data over network link in oracle 11g

Question

We want to take export of the OND schema in production database and
import it to the OND schema in UAT database over a network
link by using data pump,in Oracle 11g.Kindly share the steps.

Answer 1

Scenario:
Directly importing the TEST01 schema in the production database (oraodrmu) to test database oraodrmt, over
a network by using database link and data pump in Oracle 11g.
Note: When you perform an import over a database link, the import source is a database, not a dump file set, and the data is imported to the connected database instance.
Because the link can identify a remotely networked database, the terms database link and network link are used interchangeably.
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STEP-1 (IN PRODUCTION DATABASE - oraodrmu)
=================================================================
[root@szoddb01]>su - oraodrmu
Enter user-name: /as sysdba
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> grant resource to test01;
Grant succeeded.
SQL> grant imp_full_database to test01;
Grant succeeded.
SQL> select owner,object_type,status,count(*) from dba_objects where owner='TEST01' group by owner,object_type,status;
OWNER OBJECT_TYPE STATUS COUNT(*)
TEST01 PROCEDURE     VALID 2
TEST01 TABLE VALID 419
TEST01 SEQUENCE VALID 3
TEST01 FUNCTION VALID 8
TEST01 TRIGGER VALID 3
TEST01 INDEX VALID 545
TEST01 LOB VALID 18
7 rows selected.
SQL>
SQL> set pages 999
SQL> col "size MB" format 999,999,999
SQL> col "Objects" format 999,999,999
SQL> select obj.owner "Owner"
2 , obj_cnt "Objects"
3 , decode(seg_size, NULL, 0, seg_size) "size MB"
4 from (select owner, count(*) obj_cnt from dba_objects group by owner) obj
5 , (select owner, ceil(sum(bytes)/1024/1024) seg_size
6 from dba_segments group by owner) seg
7 where obj.owner = seg.owner(+)
8 order by 3 desc ,2 desc, 1
9 /
Owner Objects size MB
OND                    8,097     284,011
SYS                    9,601     1,912
TEST01                    998     1,164
3 rows selected.
SQL> exit
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STEP-2 (IN TEST DATABASE - oraodrmt)
=================================================================
[root@szoddb01]>su - oraodrmt
[oraodrmt@szoddb01]>sqlplus
SQL*Plus: Release 11.2.0.2.0 Production on Mon Dec 3 18:40:16 2012
Copyright (c) 1982, 2010, Oracle. All rights reserved.
Enter user-name: /as sysdba
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select name,open_mode from v$database;
NAME OPEN_MODE
ODRMT READ WRITE
SQL> create tablespace test_test datafile '/trn_u04/oradata/odrmt/test01.dbf' size 2048m;
Tablespace created.
SQL> create user test01 identified by test123 default tablespace test_test;
User created.
SQL> grant resource, create session to test01;
Grant succeeded.
SQL> grant EXP_FULL_DATABASE to test01;
Grant succeeded.
SQL> grant imp_FULL_DATABASE to test01;
Grant succeeded.
Note: ODRMU is the DNS hoste name.We can test the connect with: [oraodrmt@szoddb01]>sqlplus test01/test01@odrmu
SQL> create directory test_network_dump as '/dbdump/test_exp';
Directory created.
SQL> grant read,write on directory test_network_dump to test01;
Grant succeeded.
SQL> conn test01/test123
Connected.
SQL> create DATABASE LINK remote_test CONNECT TO test01 identified by test01 USING 'ODRMU';
Database link created.
For testing the database link we can try the below sql:
SQL> select count(*) from OA_APVARIABLENAME@remote_test;
COUNT(*)
59
SQL> exit
[oraodrmt@szoddb01]>impdp test01/test123 network_link=remote_test directory=test_network_dump remap_schema=test01:test01 logfile=impdp__networklink_grms.log;
[oraodrmt@szoddb01]>
Import: Release 11.2.0.2.0 - Production on Mon Dec 3 19:42:47 2012
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Starting "TEST01"."SYS_IMPORT_SCHEMA_01": test01/******** network_link=remote_test directory=test_network_dump remap_schema=test01:test01 logfile=impdp_grms_networklink.log
Estimate in progress using BLOCKS method...
Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 318.5 MB
Processing object type SCHEMA_EXPORT/USER
ORA-31684: Object type USER:"TEST01" already exists
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/SEQUENCE/SEQUENCE
Processing object type SCHEMA_EXPORT/TABLE/TABLE
. . imported "TEST01"."SY_TASK_HISTORY" 779914 rows
. . imported "TEST01"."JCR_JNL_JOURNAL" 603 rows
. . imported "TEST01"."GX_GROUP_SHELL" 1229 rows
Job "TEST01"."SYS_IMPORT_SCHEMA_01" completed with 1 error(s) at 19:45:19
[oraodrmt@szoddb01]>sqlplus
SQL*Plus: Release 11.2.0.2.0 Production on Mon Dec 3 19:46:04 2012
Copyright (c) 1982, 2010, Oracle. All rights reserved.
Enter user-name: /as sysdba
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select owner,object_type,status,count(*) from dba_objects where owner='TEST01' group by owner,object_type,status;
OWNER OBJECT_TYPE STATUS COUNT(*)
TEST01 PROCEDURE          VALID 2
TEST01 TABLE               VALID 419
TEST01 SEQUENCE          VALID 3
TEST01 FUNCTION          VALID 8
TEST01 TRIGGER          VALID 3
TEST01 INDEX               VALID 545
TEST01 LOB               VALID 18
TEST01 DATABASE LINK          VALID 1
8 rows selected.
SQL>
SQL> set pages 999
SQL> col "size MB" format 999,999,999
SQL> col "Objects" format 999,999,999
SQL> select obj.owner "Owner"
2 , obj_cnt "Objects"
3 , decode(seg_size, NULL, 0, seg_size) "size MB"
4 from (select owner, count(*) obj_cnt from dba_objects group by owner) obj
5 , (select owner, ceil(sum(bytes)/1024/1024) seg_size
6 from dba_segments group by owner) seg
7 where obj.owner = seg.owner(+)
8 order by 3 desc ,2 desc, 1
9 /
Owner Objects size MB
OND                8,065          247,529
SYS               9,554          6,507
TEST01               999          1,164
13 rows selected.
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STEP-3 FOR REMOVING THE DATABASE LINK
=================================================================
[oraodrmt@szoddb01]>sqlplus
SQL*Plus: Release 11.2.0.2.0 Production on Mon Dec 3 19:16:01 2012
Copyright (c) 1982, 2010, Oracle. All rights reserved.
Enter user-name: /as sysdba
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> drop database link remote_test;
Database link dropped.