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Facilità d'uso
Configuring the Processing Environment
Operating Modes
Changing From Basic Mode
You should consider changing from basic mode to extended basic mode if one or more
to Extended Basic Mode
conditions described in “When You Should Use Basic Mode,” no longer apply. In
particular, if your workload increases or you gain additional resources, performance
and application process persistency is likely to improve in extended basic mode.
An indication of the time at which you should consider changing from basic mode to
extended basic mode is this: you are using one dynamic (not static) NC process and
the NCP creates an additional NC process to support unexpected workload. You
should consider changing at this time for the following reasons:
It is more efficient and less time-consuming for the NCP to reallocate work to an
existing process (for example, an existing MS process, which handles 10 interactive
user logons) rather than create an additional NC process each time the workload
exceeds the capacity of the single dynamic NC process. Therefore, when you first
notice that an additional NC process is created in basic mode, you should begin to
monitor NonStop NET/MASTER MS to determine the frequency of NC process
creation. If infrequent, you may not consider it necessary to change to extended
basic mode: otherwise, you should seriously consider changing to extended basic
mode.
A minimum extended basic mode configuration (one NC process and at least one
other application process: for example, an MS process) uses less memory than two
NC processes. Therefore, memory usage is likely to be more efficient if you use
extended basic mode to support the additional workload.
The workload is not balanced among the two NC processes. Most of the workload
(for example, 10 interactive user logons) is handled by the first NC process; less
workload (for example, one interactive user logon) is handled by the additional
NC process. Therefore, response time and throughput in the first NC process is
likely to be slower relative to the additional NC process. (It is not possible to
predict whether the workload is likely to become more balanced over time.)
You may not need all functions available in the additional NC process, and the
resources required by the NCP to register the availability of the functions may be
wasted. For example, if the additional NC process is created to support an
additional user, only the MS function of the newly created NC process is used, but
not the BK, EM or IS functions. Therefore, the resources required to register the
BK, EM, and IS functions are wasted.
You want the NonStop NET/MASTER MS to expand in a controlled and efficient
manner. You want to support increases in workload by using the process best
suited to handle the workload. For example, rather than using an additional NC
process to handle just the MS function, you want to use MS processes instead.
Before changing from basic mode to extended basic mode, carefully monitor NonStop
NET/MASTER MS to determine why the additional NC process is created. For
example, if more than 10 users are logging on, configure an MS process in addition to
the existing NC process. If a second INMC link is being started, configure an IS
process in addition to the existing NC process.
11–32
115414 NonStop NET/MASTER MS System Management Guide
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