Open System Services Management and Operations Guide (G06.25+, H06.03+)

Managing Servers
Open System Services Management and Operations Guide—527191-002
4-4
The OSS Transport Agent Servers
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 12-67 and STOP SERVER Command on page 12-84 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, as described in OSS Subsystem Messages on page A-61.
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, as described in OSS Subsystem Messages on page A-61.
The Network Services Servers and Tools
The following subsections briefly discuss:
•
inetd on page 4-4
•
rshd on page 4-5
•
rexecd on page 4-5
•
portmap and RPCINFO on page 4-5
All but RPCINFO are usually demon processes or processes started by demon
processes on UNIX systems.
inetd
The inetd process is the UNIX and OSS equivalent of the Guardian LISTNER
process for AF_INET and AF_INET6 OSS sockets applications. In the OSS
environment, inetd is the server process that listens for network activity.
inetd is started from an OSS shell command line or script and listens for connections
on certain Internet ports. When a connection request is received, inetd decides which
service the request corresponds to and invokes a server program to service the
request. After the program completes the request, inetd continues to listen. The