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Saturday, March 19, 2016

ENABLE REAL TIME APPLY ON STANDBY DATABASE

*********************************************************************
    REAL TIME APPLY OF ARCHIVE LOG FILES IN READ ONLY MODE:
*********************************************************************

SQL> select PROTECTION_MODE,PROTECTION_LEVEL FROM V$DATABASE;

PROTECTION_MODE      PROTECTION_LEVEL
-------------------- --------------------
MAXIMUM PERFORMANCE  MAXIMUM PERFORMANCE

SQL> archive log list;
Database log mode           Archive Mode
Automatic archival           Enabled
Archive destination           /u01/app/oracle/oraarch/
Oldest online log sequence     250
Next log sequence to archive   0
Current log sequence           252

SQL> recover managed standby database using current logfile disconnect from session;
Media recovery complete.
SQL> alter database open read only;

Database altered.


***********************************************************************************
    NOW ON PRIMARY DATABASE I CREATE TABLE IN ONE OF USER ADD INSERT SOME DATA
***********************************************************************************

[oracle@Linux01 Desktop]$ sqlplus /"As sysdba"

SQL> select name,open_mode,db_unique_name,PROTECTION_MODE,PROTECTION_LEVEL FROM V$DATABASE;

NAME          OPEN_MODE                   DB_UNIQUE_NAME   PROTECTION_MODE        PROTECTION_LEVEL
--------     --------------------    ---------         --------------------         ---------
ORCL          READ ONLY WITH APPLY     ORCLSTB1        MAXIMUM PERFORMANCE      MAXIMUM PERFORMAN



SQL> conn atoorpu/XXXXX;
Connected.
SQL> create table abcd (name varchar2(20));

Table created.

SQL> insert into abcd values ('arvind');

1 row created.

SQL> commit;

Commit complete.


SQL> alter system switch logfile;

System altered.

SQL> insert into abcd values ('reddy');

1 row created.

SQL> commit;

Commit complete.

SQL> create table abcds as select * from abcd;

Table created.

***********************************************************************************
    NOW ON STANDBY DATABASE LETS QUERY SAME DATA SOME DATA
***********************************************************************************

[oracle@Linux02 Desktop]$ sqlplus /"As sysdba"

SQL> select name,open_mode,db_unique_name,PROTECTION_MODE,PROTECTION_LEVEL FROM V$DATABASE;

NAME          OPEN_MODE                   DB_UNIQUE_NAME   PROTECTION_MODE        PROTECTION_LEVEL
--------     --------------------    ---------         --------------------         ---------
ORCL          READ ONLY WITH APPLY     ORCLSTB1        MAXIMUM PERFORMANCE      MAXIMUM PERFORMAN

SQL> conn atoorpu/XXXXX;
Connected.
SQL> select * from abcd;

NAME
--------------------
arvind

SQL> select * from abcd;

NAME
--------------------
arvind
reddy

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