Chapter 14. Sysplex terminal management 195
– All static terminals with SRM=LOCAL:
When SRM=LOCAL, end-user significant status is known only to the local IMS.
– Dynamic STSN terminals with SRM=LOCAL:
Unlike ETO non-STSN terminals, for ETO STSN terminals, the SRM is set at logon
time, so IMS knows whether SRM is LOCAL or not. If it is LOCAL, then IMS will want to
manage the VGR affinity since it will be the only IMS to know whether the user has
end-user significant status.
Table 14-1 summarizes how IMS sets VGR affinity management.
Table 14-1 VGR affinity management
The existence of command significant status, when a resource structure exists, does not
affect the deletion of a VGR affinity. Because command significant status is always GLOBAL
when a structure exists, command significant status can always be recovered on another IMS
in the IMSplex. When no resource structure exists, then command significant status is always
LOCAL and will prevent the deletion of a VGR affinity.
14.7 Resources and the resource structure
The resource structure is used keep information about the IMSplex and its members (IMS,
CQS, and the RM), about global IMSplex processes (such as the global online change
process), and about individual terminal and user resources. This section describes those
resource entries used for the sysplex terminal management function, including when they are
created, what data they contain, how they are used, and when they are deleted.
14.7.1 Resource structure components and characteristics
When a connector connects to a structure defined in the CFRM policy, that connector
identifies the type of structure (list, cache, or lock) and its characteristics. For the resource
structure (and for the shared queues structures), the Common Queue Server (CQS) is the
connector. Some of the characteristics of the resource structure specified by CQS are:
How many List Headers (LH)
The resource structure is allocated with 192 list headers. A list header is an anchor point
for list entries.
What type of List Entry (LE)
Each list entry represents one IMSplex or terminal/user resource on the structure. Each
list entry is composed of several parts.
Terminal Type SRM Managed by
Static Global, None VTAM
Dynamic STSN Global, None VTAM
Dynamic non-STSN Any VTAM
Static Local IMS
Dynamic STSN Local IMS