The LST parameter Bnn_TCPIP_MAX_CLIENT_GROUPS enables you to enhance the throughput of a TCP/IP port by defining SFF client groups for the port. As a rule, one SFF client group is sufficient for normal product TCP/IP clients. However, in the event of heavy workloads on the various applications, the following values are recommended:
If you are using the BSA TCP/IP server, it is possible to create up to 26 SFF client groups (TCL groups) for a TCP/IP port. This not only takes the z/OS dispatcher control function into account, but also makes very efficient use of the internal SFF dispatcher control function, enabling throughput to be increased.
A maximum of 26 client groups can be defined using LST parameter Bnn_TCPIP_MAX_CLIENT_GROUPS=xx (valid for all global ports) or Bnn_TCPIP_MAX_CLIENT_GROUPS_app=xx, (valid for all ports for the specified application app), where xx specifies the number of SFF client groups to be generated for the port. If more than 26 client groups are specified, the parameter is automatically reset to 26. The default is 1. When the product STC is started, the number of client groups specified here are defined.
SFF client groups can be displayed by this operator command:
F stcname,TL
The name of the SFF client group is determined by the port and the application, and by the number of client groups that have been defined, for example:
|
No. of client groups |
Name components |
Description |
Example |
|---|---|---|---|
|
1 only |
app_port |
app = name of the application, e.g. OSY, BWE) port = Application port as HEX (e.g. port = 64000 = FA00 HEX) |
OSY_FA00 |
|
More than 1 |
appportb |
app = name of the application, e.g. OSY, BWE) port = Application port as HEX (e.g. port = 64000 = FA00 HEX) b = Consecutive number represented by the letters A to Z. |
OSYFA00A |