Specifications

Chapter 6. Multiple zPDT instances 81
device 402 osa osa --unitadd=2
device 403 osa osa --unitadd=3
device 404 osa osa --unitadd=4
device 405 osa osa --unitadd=5
device 406 osa osa --unitadd=6
device 407 osa osa --unitadd=7
/home/ibmsys1/aprof1
[system]
memory 800m
3270port 3270
processors 1
group ibmgroup #userid of the group controller
[manager]
name aws3274 4455
device 0700 3279 3274 mstcon
device 0701 3279 3274
/home/ibmsys2/aprofSB
[system]
memory 1000m
3270port 3271
processors 2
group ibmgroup #userid of the group controller
[manager]
name aws3274 5544
device 0700 3279 3274 mstcon
device 0701 3279 3274
Notice the two new devmap statements in this example. Both are in the [system] stanzas:
򐂰 members name1 name2 is used in the group controller definitions and specifies the Linux
userid associated with each instance in the group.
򐂰 group cntlname is used in each instance and specifies the Linux userid associated with
the group controller.
TN3270e sessions are directed to the desired instance by using the appropriate 3270port
number:
$ x3270 -port 3270 localhost & connects to the ibmsys1 instance
$ x3270 -port 3271 localhost & connects to the ibmsys2 instance
There is no need to coordinate device numbers or unit addresses among multiple instances
using shared OSA. For example, each instance might use an OSA interface at addresses
400-403. Each instance might start unit addresses (specified in the devmap) at address zero.
(Multiple guests under z/VM, in a single instance, must manage the addresses properly. Do
not confuse multiple guests under z/VM with multiple instances.)
Only DASD (CKD or FBA) and OSA can be shared. Additional devices, such as tape drives,
can be included in the group controller devmap. These additional device definitions are
inherited by all instances, but each instance uses the definitions as though they were part of
the devmap for that instance. Notice that the two instances in the previous example have
different 3270port addresses; we elected to not use shared 3270 definitions in this example.
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