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ADVANCE REPLICATION
Oracle Coretech Surabaya (OCS) One Day Seminar
Surabaya, August 30th 2008
AGENDA
• Introduction
• Master – View Replication
•
•
•
•
Multimaster & Hybrid
Case 1 (Master – View with subset)
Case 2 (Full Schema & Cross OS & DB)
Troubleshoot
Overview Of Replication
Site #1
Site #2
Replicate
Transaction
User
Database
Replica
Database
Overview Of Replication
• Replication is the process of copying and
maintaining database objects, such as
tables,in multiple databases that make up
a distributed database system.
Application
Replication typically apply for multiple site
enterpise application.
 Central – remote site application
 Autonomous remote sites
 Data integration consistency
Advance Replication Benefit
Oracle Advance Replication benefit:
 Failover
 Load Balancing (Site Autonomy)
 Interoperability (Can replicate data beetween
different platform)
 Enable Data Subsetting
Oracle HA Road Map
Integration
8i
9i
10g
11g
Basic Replication
Advanced Replication
Oracle Streams
High Availability (HA)
Basic readable standby database (Physical
Standby - Redo Apply)
Data Guard + SQL Apply (Logical
Standby)
Data Guard + Fast-start failover +
Reinstante
Active Data Guard
Prerequites Knowledge
Oracle Database Administrator (DBA) I :
…
6. Database User Account :
7. Managing Schema Object :
–
–
–
–
Table
Index
View
….
11. Configuring Oracle Network Env.
Materialized View (MV)
• View = stored select … query
• MView = View which is materialized from
a single point of time = snapshot  table
MATERIALIZED VIEW
SNAPSHOT
7.0 – 7.3
8.0
8i
9i
10g
11g
Create Materialized View
Updatable View :
CREATE VIEW HR.V_COUNTRIES AS
select * from hr.countries;
Read Only MV :
CREATE MATERIALIZED VIEW HR. MV_COUNTRIES AS
select * from hr.countries;
Create Materialized View (2)
Read Only View :
CREATE VIEW HR.V_COUNTRIES2 AS
select * from hr.countries WITH READ ONLY;
Updatable MV :
CREATE MATERIALIZED VIEW HR. MV_COUNTRIES2 FOR UPDATE AS
select * from hr.countries;
View Vs MV
SQL> Select TNAME, TAB from tab
TNAME
TAB
================ =====
COUNTRIES
TABLE
MV_COUNTRIES
TABLE
V_COUNTRIES
VIEW
like '%COUNTRIES';
SQL> select MVIEW_NAME, UPDATABLE from user_mviews;
MVIEW_NAME
U
====================
=
MV_COUNTRIES
N
MV_COUNTRIES2
Y
Refresh
• Refresh Type
 Complete
 Fast
 Force
• Refresh Method
 Primary Key
 Row ID
Refresh
• Refresh Interval




on demand
on commit
automatically on
never
Database Link
Private & Fixed User
CREATE DATABASE LINK hr.target_db CONNECT TO
hr IDENTIFIED BY hr123 USING net_target;
Public & Connected User
CREATE DATABASE LINK PUBLIC target_db USING
net_target;
Current User
CREATE DATABASE LINK target_db CONNECT TO
CURRENT_USER USING net_target;
Materialized View Log
CREATE MATERIALIZED VIEW LOG ON
Hr.countries WITH PRIMARY KEY (country_id)
Refresh Group
EXEC DBMS_REFRESH.MAKE
('group1', ‘mv_countries', SYSDATE,
'next_day(trunc(sysdate), '/*1:Hrs*/
sysdate + 1/24', FALSE, TRUE);
Advance Replication Type
• Materialized View Replication
(Master – View )
• Multimaster Replication
• Hybrid
Materialized View
(Master – View)
Master
Site
Materialized View
Site
Multimaster
• peer-to-peer or n-way replication
• equally participating in an update-anywhere
model
Master
Site
tables
Replication
group
orcl.site1
tables
tables
Replication
group
Master
Site
orcl.site2
Master
Site
prod.site3
Replication
group
Hybrid
Master
Site
Master
Site
Master
Site
Mview
Site
Master – View
tables
Master
Site
mview log
Database link
Master Group
Database link
Materialized View
Site
mview
mview Group
Step 1
Master Site Setup
• Create replication user adminitrator
• Create materialized view user
administrator
Step 2
Master Site Group
• Create Master Site Group
Step 3
Materialized view Log
• Define tables to replicate then create
materialized view log
• Add to Master Site Group
Step 4
Materialized View Site Setup
• Create materialized view user
administrator
• Create Database link to master
Step 5
Materialized View Group
• Create Materialized View Group
Step 6
Materialized View
• Create Materialized View
• Add to Materialized View Group
Master – View
using prebuilt table
tables
Master
Site
mview log
Database link
Master Group
Database link
Materialized View
Site
Prebuilt tables
mview Group
ADVANCE REPLICATION