Portal Express, Version 6.0
Operating systems: i5/OS, Linux, Windows
Plan for databases
By default, IBM® WebSphere® Portal Express installs and uses IBM DB2 Universal Database™ Enterprise Server Edition. Installing with DB2 lets you quickly get WebSphere Portal Express installed and running in a production-level environment. Before using the product extensively, learn the benefits and limitations of using DB2.
With appropriate tuning, other databases can provide performance gains. Other databases support vertical and horizontal clusters and cloning. Use multiple databases for high performance and availability.
Other databases require increased CPU and memory resources and add complexity to the configuration environment.
When you choose to transfer data to another supported database, perform the database transfer before you use the portal extensively. Large amounts of data in the databases can cause the database transfer to fail if your Java heap size is not large enough. Because information is added to the databases as you use the portal, perform the database transfer as soon as it is practical to avoid problems in a production environment.
If you are transferring from a database other than the default database, you will need to edit the wpconfig_sourceDb.properties file to update it with the source database information. This file is a copy of the wpconfig_dbdomain.properties file that is created during installation, so the default values are for DB2.
You can install the database server on the same system as WebSphere Portal Express, or you can install the database server on a different, also referred to as a remote, system.
- Remote
- Using a remote database can have performance benefits. When you are deploying in a large scale environment, you can dedicate a server specifically to your database. As more users are accessing the portal, the portal application becomes database intensive. Database activity can take up CPU utilization and disk I/O time. Separating the database from the server that the portal is running on increases capacity.
If you install the database server on a remote system, you might be required to install database client software on the WebSphere Portal Express system so that the portal can communicate with the remote database server.
- Local
- Using a local database can make administering your environment easier.
links for reltable
http://www.ibm.com/software/data/cloudscape