Same domain application program-to-local device session

For same domain application program-to-local device session pacing there are two pacing stages. One stage, which is adaptive, exists between the application program and VTAM® boundary function. Another pacing stage, which can be either fixed or adaptive, exists between the boundary function and the device LU. Figure 1 shows the pacing stage for this example. See Table 1 and Table 2 for examples of the values used by VTAM to set the pacing-window values.

Figure 1. Same domain application program-to-local device session

Diagram that shows two pacing stages for same domain application program-to-local device session.

Table 1 shows sample definition statement coding and corresponding initial send windows when data flows from the PLU to the SLU.

Table 1. Same domain application program-to-local device session—PLU to SLU flow
SRCVPAC MODEENT macro	VPACING definition statement (SLU)	Send window stage x	Send window stage y
6	n/a	6	6
0	500	500	500

Table 2 shows sample definition statement coding and corresponding corresponding initial send windows when data flows from the SLU to the PLU.

Table 2. Same domain application program-to-local device session—SLU to PLU flow
SSNDPAC MODEENT macro	VPACING APPL definition statement (PLU)	Send window stage x	Send Window Stage y
0	n/a	32767	32767
50	7 (default)	7	7
600	0	32767	32767