z/OS Communications Server: SNA Programming
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Pacing count

z/OS Communications Server: SNA Programming
SC27-3674-00

The pacing count fields permit a user to control the rate of data flow through the network path joining a VTAM® application program and a logical unit (including another VTAM application program). The four types of pacing count information are:
  • The secondary logical unit send pacing count (byte 7) specified with the SSNDPAC operand of the MODEENT macroinstruction.
  • The secondary logical unit receive pacing count (byte 8) specified with the SRCVPAC operand of the MODEENT macroinstruction.
  • The primary logical unit send pacing count (byte 11) specified with the PSNDPAC operand of the MODEENT macroinstruction.
  • The primary logical unit receive pacing count (byte 12).
Bit setting 0123 4567 (Byte 7) Meaning
0... .... Bit off = one-stage pacing.
1... .... Bit on = two-stage pacing.
.x.. .... Reserved.
..00 0000  through ..11 1111 Secondary send pacing count.
Bit setting 0123 4567 (Byte 8) Meaning
1... .... Adaptive pacing.
.x.. .... Reserved.
xx.. .... Reserved.
..00 0000  through ..11 1111 Secondary receive pacing count.
Bit setting 0123 4567 (Byte 11) Meaning
0... .... Bit off = two-stage pacing.
1... .... Bit on = one-stage pacing.
.x.. .... Reserved.
..00 0000  through ..11 1111 Primary send pacing count.
Bit setting 0123 4567 (Byte 12) Meaning
xx.. .... Reserved.
..00 0000  through ..11 1111 Primary receive pacing count.
Parent topic: Session parameter fields (BIND image)

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