Specifications

Chapter 6. Multiple zPDT instances 83
6.5 Additional shared functions
The previous section outlines the key shared device usage rules, as they apply to DASD and
OSA devices. The group controller can also include a shared aws3270 function and passive
definitions that are inherited by all instances.
Shared aws3270 options
The group controller devmap can include aws3270 definitions such as the following:
/home/ibmgroup/group1
[system]
3270port 3270
members ibmsys1 ibmsys2
[manager]
name aws3270 1234
device 700 3279 3274 mstcon
device 701 3279 3274
device 702 3270 3274
In this case the group controller has specified a port address for TN3270e connections. Each
instance inherits the complete set of 3270 device definitions (700, 701, 702) but not the
3270port address. That is, each instance has a 3270 at address 700, 701, and so forth. If a
user starts a TN3270e session connected to the 3270port number on Linux, he has several
options:
$ x3270 -port 3270 localhost & Example 1
$ x3270 -port 3270 ibmsys1@localhost & Example 2
$ x3270 -port 3270 ibmsys2.701@localhost & Example 3
$ x3270 -port 3270 ibmsys1.mstcon@localhost & Example 4
In Example 1 the desired instance is not specified. In this case, the group controller will
display a selection menu (on the new 3270 session) and you must indicate which instance
you want and, optionally, which terminal in that instance.
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This selection menu is illustrated in
Figure 6-4. In Example 2, the first available 3270 in the ibmsys1 instance is assigned. (The
instance name corresponds to the userid that started the instance.) Examples 3 and 4 specify
both an instance name and the 3270 device identifier.
Figure 6-4 Selection menu with two instances running
As a reminder, you can specify a different 3270port number and aws3274 device definitions in
each instance. In this case the shared aws3274 conditions do not apply. You could specify a
3270port number and aws3274 devices in the group controller and also specify aws3274
devices in each instance (but without a 3270port number in the instances). In this case all the
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If a specific terminal within the instance is not specified (by address, or by LU name) then the first available 3270 in
that instance is used.
*** Welcome to the zPDT selection menu ***
Please select the member to connect from the list below
or type in the member and/or LU name and depress ENTER
Selection => __ (0 to disconnect) MEMBER:________ LU:________
1) IBMSYS1
2) IBMSYS2