logical backup

LOGICAL BACKUP

Posted by Narashim Reddy .R on August 16, 2009

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Levels of Logical backup:

1.Database

2.Tablespace, Transport tablespace

3.User/Schema

4.Object(table)

[oracle@ reddy ~]$ exp help=y

Note:To take Logical Backup Database must be open.

To export the entire database to a single file dba.dmp in the current

directory:

[oracle@ reddy ~]$ exp system/manager full=y

file=dba.dmp log=dba.log consistent=y

To import the full database exported in the example above

[oracle@ reddy ~]$ imp system/manager full=y file=dba.dmp

To Dump a single schema to disk (we use the Scott example schema here)

login to server which has an Oracle client:

[oracle@ reddy ~]$ exp system/manager file=scott.dmp owner=scott

Export: Release 10.2.0.1.0 Production on Fri Nov 7 15:41:31 2008

Copyright (c) 1982, 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

Export done in US7ASCII character set and AL16UTF16 NCHAR character set

About to export specified users

. exporting pre-schema procedural objects and actions

. exporting foreign function library names for user SCOTT

. exporting PUBLIC type synonyms

. exporting private type synonyms

. exporting object type definitions for user SCOTT

About to export SCOTTs objects

. exporting database links

. exporting sequence numbers

. exporting cluster definitions

. about to export SCOTTs tables via Conventional Path

. . exporting table BONUS 0 rows exported

. . exporting table DEPT 4 rows exported

. . exporting table EMP 14 rows exported

. . exporting table SALGRADE 5 rows exported

. exporting synonyms

. exporting views

. exporting stored procedures

. exporting operators

. exporting referential integrity constraints

. exporting triggers

. exporting indextypes

. exporting bitmap, functional and extensible indexes

. exporting posttables actions

. exporting materialized views

. exporting snapshot logs

. exporting job queues

. exporting refresh groups and children

. exporting dimensions

. exporting post-schema procedural objects and actions

. exporting statistics

Export terminated successfully without warnings.

To import all the tables from the exported dump file to the same

schema(scott schema for example) :

[oracle@ reddy ~]$ sqlplus scott/tiger

SQL*Plus: Release 10.2.0.1.0 Production on Fri Nov 7 15:56:58 2008


Connected to:

Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 Production


SQL> select * from tab;

TNAME TABTYPE CLUSTERID

- -

DEPT TABLE

EMP TABLE

BONUS TABLE

SALGRADE TABLE

SQL> drop table salgrade;

Table dropped.

SQL> drop table bonus;

Table dropped.

SQL> drop table emp;

Table dropped.

SQL> drop table dept;

Table dropped.

SQL> !

[oracle@ reddy ~]$ imp system/manager file=scott.dmp fromuser=scott

touser=scott

Import: Release 10.2.0.1.0 Production on Fri Nov 7 16:01:55 2008



Production


Export file created by EXPORT:V10.02.01 via conventional path

import done in US7ASCII character set and AL16UTF16 NCHAR character set

. importing SCOTTs objects into SCOTT

. . importing table BONUS 0 rows imported

. . importing table DEPT 4 rows imported

. . importing table EMP 14 rows imported

. . importing table SALGRADE 5 rows imported

About to enable constraints

Import terminated successfully without warnings.




Connected to:





- -

DEPT TABLE

BONUS TABLE

EMP TABLE

SALGRADE TABLE

To import all the tables from the exported dump file to the different

schema:

[oracle@ reddy ~]$ sqlplus reddy/ reddy



Connected to:




no rows selected

SQL> !

[oracle@ reddy ~]$ imp system/manager file=scott.dmp fromuser=scott touser=

reddy




Production




. importing SCOTTs objects into reddy

. . importing table BONUS 0 rows imported



. . importing table SALGRADE 5 rows imported



[oracle@ reddy ~]$ exit

exit

SQL> show user

USER is reddy



- -

DEPT TABLE

BONUS TABLE

EMP TABLE

SALGRADE TABLE

To export specific tables to disk.

Login to server which has an Oracle client:

[oracle@ reddy ~]$ exp system/manager

file=expdat.dmp tables=(scott.emp,scott.dept)

Export: Release 10.2.0.1.0 Production on Fri Nov 7 16:53:04 2008



Production



About to export specified tables via Conventional Path

Current user changed to SCOTT




To import the dept and emp tables from the scott schema:




Connected to:





- -

DEPT TABLE

BONUS TABLE

EMP TABLE

SALGRADE TABLE


Table dropped.


Table dropped.

SQL> !

[oracle@ reddy ~]$ imp system/manager file=expdat.dmp fromuser=scott

tables=(dept,emp)




Production




. importing SYSTEMs objects into SYSTEM

. importing SCOTTs objects into SCOTT








Connected to:





- -

DEPT TABLE

BONUS TABLE

EMP TABLE

SALGRADE TABLE

To import tables and change the owner:

SQL> conn reddy/ reddy

Connected.


no rows selected

SQL> !

[oracle@ reddy ~]$ imp system/manager file=expdat.dmp fromuser=scott

touser= reddy tables=(dept,emp)




Production




. importing SCOTTs objects into reddy








Connected to:



SQL> show user

USER is reddy



- -

EMP TABLE

DEPT TABLE

To export specific tablespaces to disk.

Login to server which has an Oracle client:

SQL> show user

USER is SYS

SQL> select tablespace_name from dba_tablespaces;

TABLESPACE_NAME

SYSTEM

UNDOTBS1

SYSAUX

TEMP

USERS

TMP2

6 rows selected.

SQL> !

[oracle@ reddy ~]$ exp system/manager file=anil.dmp tablespaces=users;

Export: Release 10.2.0.1.0 Production on Sat Nov 8 12:09:46 2008



Production



About to export selected tablespaces

For tablespace USERS


. exporting table definitions

. . exporting table A1 14 rows exported

. . exporting table A2 4 rows exported






To import all the tables from the exported dump file to the schema:

[oracle@ reddy ~]$ exit

exit

SQL> conn anil/anil

Connected.



- -

A1 TABLE

A2 TABLE

SQL> drop table a1;

Table dropped.

SQL> drop table a2;

Table dropped.


Connected.



- -

EMP TABLE

DEPT TABLE


Table dropped.


Table dropped.

SQL> conn sys as sysdba

Enter password:

Connected.

SQL> !

[oracle@ reddy ~]$ sqlplus anil/anil

SQL*Plus: Release 10.2.0.1.0 Production on Sat Nov 8 12:25:02 2008


Connected to:




no rows selected


Connected.


no rows selected

SQL> !

[oracle@ reddy ~]$ imp system/manager file=anil.dmp tablespaces=users full=y

Import: Release 10.2.0.1.0 Production on Sat Nov 8 12:26:12 2008



Production




. importing SYSTEMs objects into SYSTEM

. importing ANILs objects into ANIL

. . importing table A1 14 rows imported

. . importing table A2 4 rows imported

. importing reddys objects into reddy




[oracle@ reddy ~]$ sqlplus anil/anil

SQL*Plus: Release 10.2.0.1.0 Production on Wed Nov 12 12:46:01 2008


Connected to:





- -

A2 TABLE

A1 TABLE

SQL> !


SQL*Plus: Release 10.2.0.1.0 Production on Wed Nov 12 12:46:29 2008


Connected to:





- -

DEPT TABLE

EMP TABLE

TRANSPORTABLE TABLESPACE:

SQL> create user anil7 identified by anil7

2 default tablespace test

3 quota unlimited on test;

User created.

SQL> grant connect,resource,create table to anil7;

Grant succeeded.

SQL> connect anil7

Enter password:

Connected.

SQL> create table test7 (c1 number) tablespace test;

Table created.

SQL> begin

2 for i in 1..10000 loop

3 insert into test7 values(i);

4 end loop;

5 end;

6 /

PL/SQL procedure successfully completed.

SQL> select count(*) from test7;

COUNT(*)

-

10000

SQL> commit;

Commit complete.

SQL> execute dbms_tts.TRANSPORT_SET_CHECK(TEST,TRUE);

PL/SQL procedure successfully completed.

SQL> select * from transport_set_violations;

no rows selected, then it is self contained(not violating).

SQL> alter tablespace test read only;

Tablespace altered.

SQL> !

[oracle@ reddy ~]$ exp file=test.dmp transport_tablespace=y

tablespaces=TEST;

Export: Release 10.2.0.1.0 Production on Thu Dec 11 16:27:23 2008


Username: sys as sysdba

Password:


Production



Note: table data (rows) will not be exported

About to export transportable tablespace meta data.

For tablespace TEST


. exporting table definitions

. . exporting table TEST7



. end transportable tablespace metadata export


[oracle@ reddy ~]$ scp test.dmp 192.168.1.9:/home/oracle/

[email protected] password:

test.dmp 100% 16KB 16.0KB/s 00:00

[oracle@ reddy ~]$ scp /home/oracle/tarun/datafiles/test01.dbf

192.168.1.9:/home/oracle/tarun4/datafiles/

[email protected] password:

test01.dbf 100% 40MB 10.0MB/s 00:04

SQL> alter tablespace test read write;

Tablespace altered.

Importing Tablespace in Destination System:

SQL> create user anil7 identified by anil7;

User created.

SQL> grant dba to anil7;

Grant succeeded.

SQL> !

[oracle@ reddy ~]$ imp file=test.dmp transport_tablespace=y

tablespaces=TEST datafiles=/home/oracle/tarun4/datafiles/test01.dbf;

Import: Release 10.2.0.1.0 Production on Thu Dec 11 16:30:07 2008


Username: sys as sysdba

Password:


Production



About to import transportable tablespace(s) metadata


. importing SYSs objects into SYS


. importing ANIL7s objects into ANIL7

. . importing table TEST7



SQL> alter tablespace test read write;

Tablespace altered.

SQL> conn anil7

Enter password:

Connected.



- -

TEST7 TABLE

SQL> select count(*) from test7;

COUNT(*)

-

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