Application program-to-application program over APPN host-to-host connection

There are three pacing stages for application program-to-application program sessions over an APPN host-to-host connection. See Table 1 and Table 2 for examples of the values used by VTAM® to set the pacing-window values. Figure 1 show the pacing stages for this example.

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

Figure 1. Application program-to-application program over APPN host-to-host connection

Diagram that shows three pacing stages for application program-to-application program over an APPN host-to-host connection.

Table 1. Application program-to-application program over APPN host-to-host connection—PLU to SLU flow
SRCVPAC MODEENT macro	VPACING APPL definition statement (SLU)	Send window stage x	Send window stage y	Send window stage z
0	0	7	128	32767
0	7	7	7	7
50	n/a	50	50	50

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

Table 2. Application program-to-application program over APPN host-to-host connection—SLU to PLU flow
SSNDPAC MODEENT macro	VPACING APPL definition statement (PLU)	Send window stage x	Send window stage y	Send window stage z
0	n/a	32767	128	7
50	7	7	7	7
50	0	32767	128	7