NonStop S-Series Operations Guide (G06.24+)

Starting and Stopping the System
HP NonStop S-Series Operations Guide—522459-007
16-25
Use Parallel Processing
This PATHCOM START command uses explicit names to start all of the TERM objects
defined in the PATHMON configuration file:
= START TERM (TERM1, TERM2, TERM3, TERM4, TERM5, TERM6)
Multiple-line commands in a command file increase execution time. By using single-
line commands, you can reduce the time required to execute a command file.
Avoid Manual Intervention
Write startup and shutdown files so that they execute correctly without requiring
manual intervention. Any time an operator must intervene, startup and shutdown time
increase. In addition, operator invention increases the possibility of human error that
could further delay startup and shutdown.
Use Parallel Processing
Using parallel processing can shorten the time required to start up or shut down your
system or application because startup and shutdown processes are distributed
throughout the processors in your system.
As an example, the following SCF command file uses parallel processing in four
processors to start several communications lines. The files START0, START1,
START2, and START3 contain the actual commands that start the communications
lines.
This command file uses a special technique intended to ensure that each process gets
started even if a given processor is out of service. The technique is to start each
process in two processors. If the first processor is down, the command file continues
to the next processor. If the first processor is up, and the process is started, the
command file still continues to the next processor but fails because the process name
($Sn) is in use by the process that was successfully started. As a result, a specified
Note. When using explicit names, you must revise your command files whenever a
configuration change occurs. Therefore, you should balance the time it takes to update
configuration files against the savings in startup or shutdown time.