NonStop Systems Introduction

The NonStop Kernel

NonStop Systems Introduction—527825-001

6-17

Transparent Access to Network Resources

You have seen that the NonStop Kernel 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 Kernel 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 6-10. Best-Path Routing in an Expand Network

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