NET/MASTER Management Services (MS) System Management Guide

Configuring Application Process Persistency
Configuring the Processing Environment
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process functions are temporarily unavailable after process failure while the NC
process is restarted.
Therefore, if the availability of select NonStop NET/MASTER MS functions is more
important than reducing the resources required by NonStop NET/MASTER MS, you
should configure NonStop NET/MASTER MS in either extended basic or advanced
mode. If you choose to use either extended basic or advanced mode, and to use more
resources, NonStop NET/MASTER MS spreads the workload among all existing
application processes.
Extended Basic Mode
In extended basic mode, in which at least one static or dynamic NC process is present,
you have two options to enhance process persistency. Of these two options, the
simplest option (option 1) is to use two static NC processes.
Consider the two options in more detail:
Option 1—Configure another NC process in addition to the existing NC process.
If one NC process fails, the other NC process continues processing. (NonStop
NET/MASTER MS processes used in this configuration are NCP, NGM, SECEXIT,
NC, and NC.)
If one NC process fails, recovery takes place in the other NC process without the
delay encountered by waiting for a new NC process to start.
Option 2—Configure one or more BK, EM, IS, or MS processes in addition to the
existing NC process. The application processes you configure depend on the
functions you consider important.
If availability of the BSYS, BMON, BLOG, and LOGP virtual users and their
background processing environments is important, configure one or more BK
processes. NonStop NET/MASTER MS spreads the virtual users and their
workload among the NC and MS processes. If either the NC or BK process fails,
one or more of these virtual users remain available. (A typical configuration is
NCP, NGM, SECEXIT, NC, and BK.)
Note It is not possible to predict how the NCP will spread the virtual users and their workload among the NC
and MS processes. Therefore, it is not possible to predict which virtual users will remain available after
NC or BK process failure.
If availability of EMS messages is important, configure an additional EM process.
NonStop NET/MASTER MS uses only one EM process, regardless of the number
of EM processes you have configured. However, if one EM process fails, recovery
takes place in the other EM process without the delay encountered by waiting for
a new EM process to start. (A typical configuration is NCP, NGM, SECEXIT, NC,
and EM.)
If access to remote systems is important, configure one or more IS processes.
“Supporting Multiple INMC Links,” earlier in this section, discusses how links are
assigned to NC and IS processes. If either the NC or IS process fails when you