What's New in Cluster Software Deployment and Performance?

This section describes the features of Oracle9i release 1 (9.0.1) as they pertain to application deployment and tuning in Real Application Clusters. This section contains the following topic:

• Oracle9i Release 1 (9.0.1) New Features for Application Deployment and Tuning in Real Application Clusters

  See Also: Oracle9i Real Application Clusters Concepts for a more complete explanation of new features for Real Application Clusters

Oracle9i Release 1 (9.0.1) New Features for Application Deployment and Tuning in Real Application Clusters

The Oracle9i release 1 (9.0.1) Real Application Clusters features and enhancements described in this section are part of an effort to simplify application deployment. Real Application Clusters is a new architecture offering scalability and high availability features that exceed the capabilities of previous Oracle cluster software releases.

• Cache Fusion's breakthrough technology simplifies the deployment for many types of online e-commerce and decision support (DSS) applications

  You can deploy a wide variety of application types on Real Application Clusters without significant code modifications.

  See Also: Part One, "Introduction to Real Application Clusters"

• Cache Fusion automatically controls resource assignments for files accessed by applications in Real Application Clusters environments

  You no longer have to assign locks to datafiles or partition your application when launching applications on Oracle cluster software. In addition, Real Application Clusters introduces direct cache-to-cache block transfers to improve performance.

  See Also: Part Two, "Scaling Applications and Designing Databases for Real Application Clusters"

• Three new views allow you to examine how Oracle is mastering resources:
  • V$GCSHVMASTER_INFO for Global Cache Service resources except those belonging to files mapped to a particular master

  • V$GCSPFMASTER_INFO for Global Cache Service resources belonging to files mapped to instances

  • V$HVMASTER_INFO for Global Enqueue Service resources

  These views track the current and previous master instances and the number of global cache (V$GCSHVMASTER_INFO) and global cache resources belonging to a file accessed frequently by a single instance (V$GCSPFMASTER_INFO), as well as the number of re-masterings of enqueue (V$HVMASTER_INFO) resources.

• Automatic undo management:
  • Oracle Corporation recommends that you deploy Real Application Clusters applications using automatic undo management. Automatic undo management minimizes the administrative overhead of managing undo tablespaces.

    See Also: Oracle9i Real Application Clusters Administration for more information on using automatic undo management