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

Managing Servers
Open System Services Management and Operations Guide—527191-002
4-2
The OSS Name Servers
Servers in other subsystems use OSS name servers for OSS pathname resolution.
Such servers and subsystems include the following:
•
The iTP WebServer httpd process
•
The Network File System (NFS)
•
HP NonStop TS/MP
•
The SQLCAT process used with SQL/MP
Communication with such servers can be affected by the configuration of OSS servers
and of the OSS subsystem. These other subsystem servers are beyond the scope of
this guide; see the appropriate manual set for more information about the configuration
and operation of a specific server.
Figure 4-1 on page 4-3 shows relationships among servers using the OSS
environment. An OSS application program can use any server shown in the figure.
The OSS Name Servers
Open System Services supports multiple OSS name server processes. This feature
can improve performance by allowing multiple processes to share the task of resolving
OSS pathnames.
You can run as many OSS name servers as you need on a system simultaneously.
Each fileset is managed by only one OSS name server; however, one OSS name
server can manage many filesets. You can use OSS Monitor SCF commands to
change the configuration of filesets and OSS name servers on your system as the
demands of your system vary.
An OSS name server can run as a single process or as a fault-tolerant process pair.
The OSS name server for the root fileset uses the process name $ZPNS; OSS name
servers for all other filesets can use any process name with a length of up to 5
characters plus the dollar sign.
If there is a backup server process, it preserves mounted fileset data as well as fileset
access if the primary server process fails. You can control the processor in which the
backup server process runs.
The OSS name servers are configured and controlled through OSS Monitor SCF
commands. See Section 12, Open System Services Monitor, for more information
about those SCF commands.
The OSS Message-Queue Server
The OSS message-queue server runs as a fault-tolerant process pair. The server uses
the default process name $ZMSGQ.
The backup server process preserves message-queue data as well as the queues
themselves if the primary server process fails. You can control the processor in which
the backup server process runs.