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Open System Services Management and Operations Guide (G06.29+, H06.07+)

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Managing Servers
Open System Services Management and Operations Guide—527191-005
4-4
The OSS Sockets Local Server
The OSS Sockets Local Server
The OSS sockets local server can run as a single process or as a fault-tolerant
process pair. The server uses the default process name $ZPLS.
The backup server process preserves socket access if the primary server process fails.
You can control the processor in which the backup server process runs.
You can start and stop the OSS sockets local server using the OSS Monitor SCF
commands START SERVER and STOP SERVER (see START SERVER Command
on page 12-66 and STOP SERVER Command on page 12-82 for detailed information
about these commands).
If the OSS sockets local server fails completely, you can restart it. Server failure can be
detected from the Event Management Service (EMS) messages issued to your system
logs.
The OSS Transport Agent Servers
There is one OSS transport agent server (used for OSS sockets communication) for
each processor in your system. The process name is $ZTAnn, where nn is the
processor number. Each OSS transport agent server is automatically started when the
processor it runs on is started.
You can start and stop the OSS transport agent servers using the OSS Monitor SCF
START SERVER Command and STOP SERVER Command. You cannot add, modify,
or remove an OSS transport agent server.
If an OSS transport agent server fails completely, you can restart it. Server failure can
be detected from the Event Management Service (EMS) messages issued to your
system logs.
The Terminal Helper Servers
There is one terminal helper server process (used for OSS nonblocking terminal input
and output) for each processor in your system. The terminal helper server provides
support for application use of the select() function and the FILE_COMPLETE_
family of procedure calls on terminal device files to provide nonblocking terminal
input/output.
The process name is $ZTTnn, where nn is the processor number. Each terminal
helper process server is automatically started when the processor it runs on is started.
You cannot start and stop the OSS terminal helper servers using the OSS Monitor SCF
START SERVER Command and STOP SERVER Command. You cannot add, modify,
or remove an OSS terminal helper server.