HP NonStop G-Series - Manual (Page 42)

PortName Object Configuration
Workstation Configuration
2–14 110838 Tandem Computers Incorporated
NumberOfInterprocessSessions
You configure each PortName object (port) with one or two pools of RSC data
communications sessions. You can configure one pool of RSC interprocess sessions
that you can use to communicate directly with Pathway server classes or Guardian
processes. You can also configure one pool of RSC Intelligent Device Support (IDS)
sessions that you can use to communicate with Pathway server classes through a
Tandem-resident Pathway IDS requester that you write. For more details on RSC
session types, see the RSC manuals listed in the preface.
Any DDE conversation is tied to either an RSC interprocess session or an RSC IDS
session, but not both. ServiceName objects represent types of transactions (such as
“read employee information”). The SessionType attribute that you specify for a
ServiceName object indicates whether the transaction type defined by the
ServiceName will use a session from the interprocess session pool or the IDS session
pool. See the “Service Map Configuration File” topic later in this section for detailed
information on configuring ServiceName objects.
Enter the number of RSC interprocess sessions that you want started for the data
communications connection associated with the PortName object. These sessions form
a pool from which they are temporarily allocated to the DDE conversations started by
your client application. This temporary allocation takes place when, in any given DDE
conversation, you issue the first INITIALIZESERVICE command and it references a
ServiceName object with a SessionType attribute of 0 (zero).
You will need as many RSC sessions in the interprocess session pool as there might be
concurrent DDE conversations (tied to RSC interprocess sessions) with the Tandem
DDE Gateway from your client application. This number should generally be low (1
to 3) because individual DDE conversations usually exist only for the time it takes to
process one transaction (maybe 1 to 2 seconds).
Default
The minimum value is 0 (zero). The maximum value is the sum of the
NumberOfInterprocessSessions and the NumberOfIdsSessions (which must be 16
or less). The default value is 1 session.
Example
NumberofInterprocessSessions=3
NumberofIdsSessions
Enter the number of RSC Intelligent Device Support (IDS) sessions that you want
started for the data communications connection associated with the PortName object.
These sessions form a pool from which they are temporarily allocated to DDE
conversations started by your client application. This temporary allocation takes place
when, in any given DDE conversation, you issue the first INITIALIZESERVICE
command and it references a ServiceName object with a SessionType attribute of 1
(one).