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The System Architecture
system are also connected to an external LAN. The application nodes, used for running
parallel programs, are accessed through the RMS.
Figure 2.1: A Network of Nodes
ManagementNetwork
SwitchNetwork
SwitchNetworkControl
Terminal
Concentrator
InteractiveNodes
withLAN/FDDI
Interface
ApplicationNodes
...
QM-S16
Switch
All of the nodes are connected to a management network (normally, a 100 BaseT
Ethernet). They may also be connected to a Compaq AlphaServer SC Interconnect, to
provide high-performance user-space communications between application processes.
The RMS processes that manage the system reside either on an interactive node or on a
separate management server. This node, known as rmshost, holds the RMS database,
which stores all state for the RMS system.
For high-availability installations, the rmshost node should be an interactive node
rather than a management server. This will allow you to configure the system for
failover, as shown in Figure 2.2 (see Chapter 15 of the System Administration Guide for
details).
2-2 Overview of RMS