TS/MP 2.5 System Management Manual

Figure 2 NonStop TS/MP Application With Guardian and OSS Servers
Distributing a Pathway or PATHMON Environment
Depending on the requirements of your application, you might distribute a Pathway or PATHMON
environment over several processor in a single NonStop system or among several NonStop systems.
One way to optimize response time for your business transactions might be to distribute your
application’s workload across more than one processor in a NonStop system. Figure 3 (page 21)
shows PATHMON-controlled objects configured on two CPUs in a system. This environment includes
both NonStop TS/MP processes (PATHCOM, PATHMON process, server classes) and Pathway/iTS
processes (TCPs and TERM objects).
You can distribute functions over different physical or geographical locations by configuring
elements of a single PATHMON environment on various nodes in a network connected by
communications lines, or by configuring two or more PATHMON environments to communicate
across such a network. As an example, you can allow TCPs on one node to access a database
maintained by server processes on another node. This configuration allows multiple applications
on different nodes to share data.
Figure 4 (page 22) illustrates a NonStop TS/MP application server class distributed across two
nodes. The application checks accounts and updates it using batch processing. The batch requestor
process and a server class are configured on \NODEA while a second server class is configured
on \NODEB. Both \NODEA and \NODEB are connected over communication lines. Additionally,
there are two PATHMON processes (one on each node) managing the server classes at their
respective nodes. The requestor process on \NODEA connects to the server class on \NODEB
using the ACS subsystem process running on the same processor as that of the requestor process
on \NODEA. The ACS subsystem processes on \NODEA communicate with the PATHMON process
on \NODEB to find a link to the server class running on \NODEB.
20 Introduction to NonStop TS/MP System Management