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VCS nodes host the service groups (managed applications). Each system is connected to networking hardware, and usually also to storage hardware. The systems contain components to provide resilient management of the applications, and start and stop agents.
Nodes can be individual systems, or they can be created with domains or partitions on enterprise-class systems. Individual cluster nodes each run their own operating system and possess their own boot device. Each node must run the same operating system within a single VCS cluster.
Clusters can have from 1 to 32 nodes. Applications can be configured to run on specific nodes within the cluster.