TS/MP System Management Manual (G06.24+, H06.03+)

Configuring Objects in a PATHMON Environment
NonStop TS/MP System Management Manual—541819-001
3-27
Understanding the Effects of Link Configuration
because the PATHMON process cannot create another server process to satisfy the
link requests. This situation is illustrated in Figure 3-5, which shows a server class that
allows only one server process to run at a time. The server process can handle only
one request: Request 1 from TCP-1. Other requests, from TCP-1, TCP-2, and the
LINKMON process, are waiting to be processed. The problem is further complicated
by the fact that if TCP-1’s link is a static link, the TCP will not necessarily return the link
automatically.
Consider this configuration for a server class:
MAXLINKS = 5
LINKDEPTH = 1 (suggested general value)
MAXSERVERS = 1
This configuration specifies that a maximum of five links to each server process in this
server class is allowed; each link manager can have only one link to each server
process in this class; and only one server process can run in this class at any one time.
Consequently, if a LINKMON process is managing five requester processes, and each
process sends a request to this server class, four processes must wait for the one link
to become available. However, if the server configuration were changed to make
MAXSERVERS = 5, each process’s send request can be handled by a separate server
process. Processing under this configuration is shown in Figure 3-6 on page 3-28.
Figure 3-5. Link Configuration With MAXSERVERS Set to 1
PATHMON
Server Class
TCP
LINKMON
TCP
1 server process
running
MAXLINKS = 1
MAXSERVERS = 1
Request 1 - processing
Request 2 - waiting
Request 3 - waiting
Request 5 - waiting
Request 6 - waiting
Request 7 - waiting
Request 4 - waiting
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