VPACING


   .-VPACING--=--(--2--,--1--,--ADAP--)------------------.   
>>-+-----------------------------------------------------+-----><
   |             .-(--2--,--1--,--ADAP--)--------------. |   
   '-VPACING--=--+-------------------------------------+-'   
                 +-max---------------------------------+     
                 +-(--max--+----------------------+--)-+     
                 |         +-,--,--ADAP-----------+    |     
                 |         +-,--,--FIXED----------+    |     
                 |         |         .-,--ADAP--. |    |     
                 |         '-,--min--+----------+-'    |     
                 |                   '-,--FIXED-'      |     
                 |    .-,--,--ADAP--.                  |     
                 '-(--+-------------+--)---------------'     
                      '-,--,--FIXED-'

statements:

GROUP, LINE, PU, LU, CLUSTER

dependencies:

VTAM® only

range:

0–63

Specifies how pacing is handled between VTAM and the NCP.

The formats for VPACING values are:

VPACING=(max,min,type)
VPACING=max
VPACING=(max,min)
VPACING=(max,,type)
VPACING=(,,type)

max: Specifies the maximum window size. max is the maximum number of normal-flow requests that VTAM sends for a given LU-LU session before waiting for a pacing response. No further normal-flow requests can be sent to the logical unit until it is ready to receive more requests.
max can be expressed with leading zeros and is limited to eight digits.
min: Specifies the minimum window size.
min can be expressed with leading zeros and is limited to eight digits.
type: Specifies the pacing type: FIXED or ADAPTIVE (ADAP).
type is used only by NCP, and it requires at least NCP V5R4.

Defaults for VPACING follow:

If none of the values are specified, the defaults are VPACING=(2,1,ADAP).
If only max is specified, its value is also used for min. type defaults to ADAP.
If max and min are specified, and max equals 0, then the defaults are VPACING=(2,1,ADAP).
If max and min are specified, and max does not equal 0, max must be greater than or equal to min for those values to be used. type is set to ADAP. If max is less than min, the values are set to VPACING=(2,1,ADAP).
If max and type are specified, min takes the value of max.
If only type is specified, max and min are set to 1.

For more information about pacing, see z/OS Communications Server: SNA Network Implementation Guide.