Required memory sizes for the Send program

This section explains how to calculate the required memory sizes for the HULFT Send program.

The method to calculate the required memory sizes depends on the storage where the code conversion tables are expanded.

Specify the location of the storage where the code conversion tables are expanded to Storage for Code Conversion Table (CODE-CONVERSION-LOCATION) in the System Environment Settings file (HULPRM).

For details, refer to the following:

HULFT10 for zOS Administration Manual : Explanation of each field

Note

The calculations shown here are intended to serve as a guide. Calculated memory sizes and the actual memory sizes may differ depending on the system environment in use.
The formulas assume that the block size of send files is "32760".

When loading the code conversion table into a "31-bit storage area"

Use the formulas shown below to calculate the required memory sizes for the Send program (unit: KB).

Formula for the below-the-line storage

Required memory size for the Send program in the below-the-line storage = a + b + c + d

Formula for the above-the-line storage

Required memory size for the Send program in the above-the-line storage = e + f + g + h

The below tables show the calculations for the substituted values.

Table D.1 Substituted Values in Calculation for Below-the-Line Storage
		Below-the-line storage	Remarks
a	Startup	520KB	Fixed value
b	Send startup tasks	Send Startup Task Count (TASK-CNT) x 8KB
c	I/O buffers for send files	0KB
d	Work File Transfer	0KB
	Direct Transfer	0KB
	Transfer (software DEFLATE compression)	Number of sending-side transferring instances executed simultaneously x 64KB
	Transfer (hardware DEFLATE compression)	Number of sending-side transferring instances executed simultaneously x 64KB

Table D.2 Substituted Values in Calculation for Above-the-Line Storage
		Above-the-line storage	Remarks
e	Startup	2,936KB	Fixed value
f	Send startup tasks	Send Startup Task Count (TASK-CNT) x 240KB
g	I/O buffers for send files	Number of sending-side transferring instances executed simultaneously x I/O Buffer Count for Sending (SNDBNO) x 32KB
h	Work File Transfer	Number of sending-side transferring instances executed simultaneously x 84KB
	Direct Transfer	Number of sending-side transferring instances executed simultaneously x 320KB
	Transfer (software DEFLATE compression)	(Number of sending-side transferring instances executed simultaneously x 950KB) + 3,300KB
	Transfer (hardware DEFLATE compression)	(Number of sending-side transferring instances executed simultaneously x 600KB) + 3,300KB

Calculation example

If files are sent using only Work File Transfer with the following values, calculate the required memory sizes for the Send program as shown below.

Table D.3 Values for this Calculation Example
Field	Value
Send Startup Task Count (TASK-CNT)	4
I/O Buffer Count for Sending (SNDBNO)	5
Number of sending-side transferring instances executed simultaneously	4

Required memory size for the Send program (below-the-line storage)

a:: 520KB
b:: (4 x 8)KB
c:: 0KB
d:: 0KB

Required memory size for the Send program (above-the-line storage)

e:: 2,936KB
f:: (4 x 240)KB
g:: (4 x 5 x 32)KB
h:: (4 x 84)KB

The above calculations result in the following required memory sizes for the Send program:

Required memory size in the below-the-line storage: a + b + c + d = 552KB

Required memory size in the above-the-line storage: e + f + g + h = 4,872KB

When loading the code conversion table into a "64-bit storage area"