1. Using EDB Postgres Replication Server to Offload Oracle Reporting Workloads to Postgres
Matthew Lewandowski

2. Why offload reporting workloads from Oracle to Postgres?
Reduce Oracle licensing cost
free up existing Oracle licenses for other more critical uses
help provide a safeguard against violation of existing Oracle licensing constraints
possibly reduce the need for purchasing additional Oracle components or features
Facilitate integration of data in Oracle databases with data in Postgres databases and other sources
Ease transition of migrating existing applications from Oracle to Postgres
reduce risk
increase schedule flexibility
support a graceful switchover
Possible performance benefits
allow OLTP system to be tuned for optimal transaction performance
allow reporting system to be tuned for optimal query performance

3. What is EDB Postgres Replication Server?
EDB Postgres Replication Server is a tool provided by EnterpriseDB for near real-time replication of data from one database to another
SMR for Reporting Offload to Postgres
Oracle
SQL Server
PostgreSQL
Advanced Server
READ/WRITE
MASTER
Highlights
Single Master Replication (SMR) or Multi Master Replication (MMR)
* Oracle-to-Postgres Replication supported via SMR *
Filter only data you need replicated
Continuous, scheduled, or on demand
Available for use with any of the EnterpriseDB subscription offerings
Formerly known as xDB Replication Server
Data filtering
Scheduling
Near real- time replication
PostgreSQL
Advanced Server
READ
REPLICA

4. What are the components in an Oracle-to-Postgres Replication?
EDB Postgres Replication Server
Publication Server
Subscription Server
Config File
xDB Replication Console or
xDB Replication Server CLI
Metadata
Postgres Subscription Database Definition
Control Schema
Metadata Objects
Metadata
Oracle Publication Database Definition
Publication
Schema 1
Table A
Schema 2
Table X
Table Y
Subscription
Replication
Table A
Table X
Table Y
Oracle DB
Publication DB
Schema 1
Table A
Table B
Table C
Schema 2
Table X
Table Y
Table Z
Postgres DB
Subscription DB
Schema 0
Table 1
Table N

5. What are the steps to configure and perform an Oracle-to-Postgres Replication?
Prepare the publication database, by creating or configuring an Oracle user with necessary privileges for managing publication information and retrieving publication data
can connect to publication database
can create control schema objects
can read publication tables and views
can create triggers on publication tables
Prepare the subscription database
Create a new superuser or choose an existing superuser to be the subscription database user
Create or choose the subscription database
Add the Oracle database as a Single Master Replication (SMR) publication database
Create publication with tables from Oracle database
Add PostgreSQL or EDB Postgres Advanced Server subscription database
Create subscription in subscription database for replicating Oracle publication
Perform initial snapshot for subscription of Oracle publication
Perform or schedule synchronizations of subscription

6. EDB Replication Server
Demo Preparation
Publication Database
Database Type
Oracle
Host
Port
49161 (normally 1521 would be specified)
User hr
SID xe
EDB Replication Server
Publication Server
Host
localhost
Port
9051
User
admin
Subscription Database
Database Type
Postgres Plus Advanced Server
Host
localhost
Port
5450
User
subuser
Database
orarepdemo
Subscription Server
Host
localhost
Port
9052
User
admin

7. Thank You www.enterprisedb.com
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