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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
System administrationThese topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL OneDB™ database servers.
Administrator's GuideThe HCL OneDB™ Administrator's Guide provides the information required to administer HCL OneDB™.
High availability and scalabilityA successful production environment requires database systems that are always available, with minimal if any planned outages, and that can be scaled quickly and easily as business requirements change.
Strategies for high availability and scalabilityHCL OneDB™ database software can be customized to create the appropriate high availability and scalability solution to match your business goals and environment.
Components supporting high availability and scalabilityHCL OneDB™ database software can be customized to create systems that provide uninterrupted services, minimize maintenance and downtime, automatically redirect client connection requests to the most appropriate database servers, and distribute both processing and storage across hardware.
Advantages of data replication
Primary and secondary database servers

Primary and secondary database servers

When you configure a set of database servers to use data replication, one database server is called the primary database server, and the others are called secondary database servers. (In this context, a database server that does not use data replication is called a standard database server.) The secondary server can include any combination of the SD secondary, RS secondary, and HDR secondary servers.

As the following figure illustrates, the secondary database server is dynamically updated, with changes made to the data that the primary database server manages.

This figure is described in the surrounding text. — Figure 1: A primary and secondary database server in a data replication configuration

If one of the database servers fails, as the following figure shows, you can redirect the clients that use that database server to the other database server in the pair, which becomes the primary server.

This figure shows client computers redirected to the secondary database server after the primary database server fails. — Figure 2: Database servers and clients in a data replication configuration after a failure

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