Creating a distributed database in Oracle involves setting up multiple instances of the Oracle database, each running on a separate machine, and then configuring them to work together as a single, unified database. Here’s an example of how you might create a distributed database in Oracle:
- Install and configure multiple instances of the Oracle database on separate machines.
- Create a new database service for the distributed database using the
dbca(Database Configuration Assistant) command-line tool:
dbca -createDatabase -templateName General_Purpose.dbc -gdbname dbname -sid sid -responseFile NO_VALUE -characterSet AL32UTF8 -memoryPercentage 40 -emConfiguration NONE
- Create a new database link that connects the new service to the existing remote databases. This step can be done using the SQL
CREATE DATABASE LINKstatement:
CREATE DATABASE LINK remote_db CONNECT TO remote_user IDENTIFIED BY remote_password USING'remote_tns_service_name';
- Test the connection by running a query on the remote database via the new database link:
SELECT * FROM remote_table@remote_db;
- Configure the distributed database to use a distributed transaction manager, such as the Oracle Advanced Queuing (AQ) for distributed transactions.
- Configure the distributed database for distributed data management, such as by creating distributed tables and materialized views.
Please keep in mind that creating a distributed database is a complex task and this example code is just a basic demonstration of how you might create a distributed database in Oracle. Each step of the process has many additional settings, parameters, and dependencies that need to be configured correctly.
Also, I would like to mention that creating a distributed database in Oracle is an advance topic and should only be done by experienced DBAs, with an in-depth understanding of how Oracle databases works, with good knowledge of the platform, its features and performance characteristics, as well as with good knowledge of the problem domain to ensure the correct solution.