Cluster interprocess communication (CIPC) is a critical subsystem in the cluster architecture. Most cluster subsystems use CIPC to communicate with other instances in the cluster.
A high-speed CIPC network is necessary to gain acceptable
Cluster Edition performance.
Tasks running on instances within the cluster use CIPC to communicate with other tasks in other instances in the cluster. CIPC information specified in the cluster input file and stored on the quorum device is used to connect all instances in the cluster. Within the input file, CIPC supports a primary and an optional secondary interconnect. The secondary interconnection, if present, is used for buffer-cache transfers, reducing the load on the primary interconnection.
