Learn about the Adaptive Server Enterprise Cluster Edition here.
The Cluster Edition allows a single installation, a private mode installation, and multiple installations of Adaptive Server to operate on multiple nodes as a shared-disk cluster environment with a single-system view. Each server runs on a separate node; called a "server instance" or "instance." You can use a single configuration file to determine the configuration for all instances (a shared installation), or each instance can use a separate configuration file (a private installation).
The Cluster Edition allows you to scale workloads using multiple physical and logical clusters. If an instance in a cluster fails, one or more of the still-running instances take over the workload of the failed instance. The cluster determines the instance to which each client connects. If one instance is overloaded, the cluster balances the load by shifting clients to other, more available instances.
The Cluster Edition provides a distributed architecture. Internode communication takes place via a network interconnection, rather than via shared memory. Applications that minimize internode messaging yield the best performance in the Cluster Edition environment.
The Cluster Edition supports a single-system presentation. That is, multiple instances that make up the cluster appear to clients as a single system. New client technologies allow clients to connect logically to a cluster while remaining physically connected to individual instances. This logical connection allows Adaptive Server to redirect clients to various instances in the cluster and to dynamically provide clients highly available failover data.
The Cluster Edition workload manager can customize workload management and failover for your business applications so that each performs most efficiently. The logical cluster provides individualized working environments.
See the Cluster Users Guide for detailed information about the Cluster Edition.