NonStop Systems Introduction for H-Series RVUs

The NonStop Operating System

NonStop Systems Introduction for H-Series RVUs—540083-001

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Transparent Access to Network Resources

You have seen that the NonStop operating system was specifically designed to blur

processor boundaries in a local multiple-processor system. The file system and

message system enable a process running in one processor to access the resources

of any other processor in the system.

Similarly, the Expand network extension of the NonStop operating system blurs node

boundaries within the network and enables the network to function as a single large

system. A process running in a local system can access processes, files, and devices

on other systems as easily as it can access resources on the local system. (Some

limitations exist for OSS processes accessing objects in the Guardian environment on

another node.)

However, system and Expand security mechanisms and other security products exist

to control access to network resources. These security tools provide authentication,

authorization, and auditing services for objects on the network and restrict the use of

each object to a given set of users.

Figure 6-12 on page 6-20 shows that authorized users can carry out operations in an

Expand network as easily as in a local system. Users can access network resources

Figure 6-11. Best-Path Routing in an Expand Network

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