Chapter 3. Operating NetView FTP V2.2.1 MVS - IBM

Chapter 7. Setting Up a Server Group Table
This chapter describes how to set up a server group table. The server group table
only contains information about SNA servers. It contains no information about OSI
servers.
A server group table is a data set that assigns each of the servers in your network
to a group and contains information about each server. Using a server group table
has the following advantages:
� It gives local servers a wider range of potential session partners. The local
server that processes a request can establish a session with any of the servers
in the group. If one server in the group is busy or not yet started, the local
server tries the next server in the group until it succeeds in establishing a
session or has tried all the servers in the group. Without a server group table,
users must specify the LU name of a single remote server. If this server is not
available, the file transfer cannot take place.
Note, however, that server groups are not supported for NetView FTP/2 and
NetView FTP AIX. An entry for NetView FTP/2 or NetView FTP AIX represents
a NetView FTP Server for OS/2 or NetView FTP Server AIX, respectively.
� You can make the names of the server groups easier to remember than LU
names, which often must follow technical naming conventions.
Make sure that the server group table specifications are correct to avoid delays
when the transfer starts.
Creating a Server Group Table
The server group table is a sequential data set with the ddname DVGNDT. To use
the server group table, specify this ddname in the startup job of the queue handler.
This startup job is described in Chapter 10, “Writing Startup Procedures for
NetView FTP V2.2.1 MVS” on page 95. The queue handler reads the server group
table into its address space. Any changes made to the server group table after the
queue handler has started do not become effective until the queue handler has
been stopped and restarted.
Member DVGSVGRP in DVG.NFTP230.INSTLIB is a sample server group table
that you can inspect and modify for your own use.
Each record of the server group table corresponds to one server. Each record
must have the following format:
│ Server Group │ │Operat.│ │ LU name │ │FTP │ │R│ │Description
│ Name │ │sys. │ │ │ │level│ │M│ │
└───────────────┴─┴───────┴─┴───────────────┴─┴─────┴─┴─┴─┴─────────────
� � � � � � � � � 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3
1 2 3 4 5 6 7 8 9 � 1 2 3 4 5 6 7 8 9 � 1 2 3 4 5 6 7 8 9 �
Figure 49. Layout of the NetView FTP V2.2.1 MVS Server Group Table
© Copyright IBM Corp. 1988, 1994 85