SNAX/HLS Configuration and Control Manual

Step 4. Planning the Application Environment
Planning the SNAX/HLS Environment
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If this attribute is selected, SNAX/HLS will use read buffers whose size is sufficient to
accommodate the largest possible SSCP-LU message. This value is in the range 256 to
30,720 as determined by a configuration parameter, SSCPTEXTSIZE, and may be
modified by the operator. Its default value is 4,096.
Large reads consume valuable resources. If this situation pertains to your
environment, you may wish to explore the use of the Two-Step Read feature.
If this option is selected, SNAX/HLS will use read buffers whose size is sufficient to
accommodate the largest possible SSCP-LU message. This value is in the range 256 to
30720 as determined by the startup parameter SSCPTEXTSIZE, and may be modified
by the operator. Its default value is 4096.
BIND and CINIT Data
The PROFILE attribute, WANT-BIND-DATA, controls whether your application
receives user-text fields that appear on BIND and CINIT messages. If enabled, the
program receives notification of these events, even though user-text fields might be
empty. You can specify that such data will or will not include the requester-ID and
password fields.
User-Controlled Responses
The PROFILE attribute USER-RESPONSES, inhibits the automatic generation of
responses to FMD requests by the SNAX/HLS server. Instead, the application must
tell the SNAX/HLS server when to respond and the type of response. You should
enable this attribute and use the feature if your partner links the receipt of a response
to some form of commitment of a transaction.
Encode ERI
The PROFILE attribute ENCODE-ERI provides compatibility with earlier versions of
SNAX/HLS. In earlier versions, the value of the ERI bit on inbound requests was not
available to the application program—only the DR configuration was passed. The
ENCODE-ERI attribute allows SNAX/HLS to pass the value of this indicator to
application programs. This attribute should be enabled for most new applications.
Flow Control Data
The PROFILE attribute, WANT-FLOW-CONTROL, specifies whether your application
is to receive notification of the arrival of any of the six flow control messages shown in
Table 2-1.
Table 2-1. Flow Control Messages
SNA Message Meaning SNAX/HLS Encoding
RTR Ready to receive RT
QEC Quiesce at end-of-chain SM
QC Quiesce complete QM
RELQ Release Quiesce RM