Expand Configuration and Management Manual (H06.03+)

Subsystem Description
Expand Configuration and Management Manual—529522-002
17-7
Expand Manager Process ($ZEXP)
Network Utility Process Functions
The network utility process, $ZNUP, answers requests that must wait for system
information. It also responds to requests for the time at remote systems, the process
information of remote processes, device-information requests, and traffic statistics.
The network utility process runs as logical device number 4.
Expand Manager Process ($ZEXP)
The Expand manager process, $ZEXP, provides the interface between the Expand
subsystem and the Subsystem Control Point (SCP). The Expand manager process
must be started and named $ZEXP. SCP is the managing process for the Subsystem
Control Facility (SCF). The Expand manager process directs SCF commands to the
appropriate Expand line-handler process and forwards responses from Expand line-
handler processes to the appropriate user.
Components Summary
Figure 17-1 illustrates an Expand network environment.
Note. The SCF interface to the Expand subsystem is described in Section 14, Subsystem
Control Facility (SCF) Commands.
Figure 17-1. Expand Network Environment
010CDT .CDD
Kernel
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$ZNUP
$NCP
$ZEXP
File
System
Requester
Application
Message
System
Server
Application
Kernel
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$ZNUP
$NCP
$ZEXP
File
System
Requester
Application
Message
System
Server
Application
Expand Line-
Handler
Process
Node \A
Node \B
Expand Line-
Handler
Process