NET/MASTER Management Services (MS) Command Reference Manual

LBANNER
PARAM GMMPROCESS
NonStop NET/MASTER MS Commands
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GMMPROCESS
GMMPROCESS= logical-name
specifies a logical name for a global memory manager (GMM) process.
You can specify up to 16 GMM processes. For each, you must specify a unique
logical name from 1 through 12 characters long. You can use the following
characters:
Alphabetic characters: A through Z and a through z
Numeric characters: 0 through 9
Other characters: ^ ~ # $ { } - . : @ [ \ ] _ ` |
Considerations
GMM processes are NonStop NET/MASTER MS processes. They provide a
central repository for information required by NonStop NET/MASTER MS that
requires global visibility, that is, visibility by all NonStop NET/MASTER MS
processes.
GMM processes normally execute as NonStop process pairs. The primary process
of a GMM process pair is created and started by the NonStop NET/MASTER MS
control process (NCP) using the PARAM commands that define the process. The
primary GMM process creates its own backup process. The primary and backup
GMM processes must run in different central processing units (CPUs) to provide
full fault-tolerance. If one GMM process in a pair fails, its backup process takes
over. If both GMM processes in a pair fail, NonStop NET/MASTER MS stops.
Note NonStop NET/MASTER MS generates a warning event message (NNM1402) if a GMM process runs
without a backup process.
In a production environment, it is recommended that you always start GMM processes with a backup
process. In a test or development environment, where process space or memory resources may be
scarce, you can run GMM processes without a backup process by specifying identical primary and
backup CPUs (see the PARAM PROCESSCPU command for more information).
You can define multiple GMM processes. Multiple GMM processes are normally
used only in large systems where using a single GMM process may impede the
performance of NonStop NET/MASTER MS. It is good practice to give a GMM
process a higher priority than other processes.
If you include the PARAM GMMPROCESS command in the configuration file,
NonStop NET/MASTER MS does not use any default GMM configuration.
Error messages generated by GMM processes are sent as EMS event messages
rather than as messages to the hometerm.