OpenVMS Cluster Systems - OpenVMS Systems - HP

3
OpenVMS Cluster Interconnect Configurations
3.1 Overview
This chapter provides an overview of various types of OpenVMS Cluster
configurations and the ways they are interconnected.
References: For definitive information about supported OpenVMS Cluster
configurations, refer to:
• OpenVMS Cluster Software Software Product Description (SPD 29.78.xx)
• Guidelines for OpenVMS Cluster Configurations
All Alpha and VAX nodes in any type of OpenVMS Cluster must have direct
connections to all other nodes. Sites can choose to use one or more of the
following interconnects:
• LANs
ATM
Ethernet (10/100 and Gigabit Ethernet)
FDDI
• CI
• DSSI
• MEMORY CHANNEL
• SCSI (requires a second interconnect for node-to-node [SCS] communications)
• Fibre Channel (requires a second interconnect for node-to-node [SCS]
communications)
Processing needs and available hardware resources determine how individual
OpenVMS Cluster systems are configured. The configuration discussions in this
chapter are based on these physical interconnects.
3.2 OpenVMS Cluster Systems Interconnected by CI
The CI was the first interconnect used for OpenVMS Cluster communications.
The CI supports the exchange of information among VAX and Alpha nodes, and
HSC and HSJ nodes at the rate of 70 megabits per second on two paths.
OpenVMS Cluster Interconnect Configurations 3–1