SYSRES Macro The strtcyl is a 1-to 3-digit decimal number designating the first
real cylinder where CP checkpoint start information is to be saved.
The cylcount value is a 1-digit decimal number (1 through 9) that
defines the maximum number of cylinders to contain checkpoint start
data. If cylcount is not specified, 1 is the default value.
The cylcount operand is optional; if included, the strtcyl and
cylcount operands must be separated by a comma and enclosed in
parentheses. Parentheses are optional when only the strtcyl
operand is specified.
The number of cylinders required for the checkpoint start data is
dependent upon the device type. They are as follows: 2305 2314 2319 3330 No. of Cl:linders 3 ,j ,j 4U 3350 r , SYSWRM=[ (]strtcyll , cylcount I [ ) ] I , 1 I L
2
2
1 ,j 1
is the number of the real starting cylinder, and optionally the
maximum number of cylinders, to contain the warm start data.
The strtcyl is a 1-to 3-digit decimal number designating the first
real cylinder where CP warm start information is to be saved.
The cylcount value is a 1-digit decimal number (1 through 9) that
defines the maX1mum number of cylinders to contain warm start data.
If cylcount is not specified, 1 is the default value.
The cylcount operand is optional; if included, the strtcyl and
cylcount operands must be separated by a comma and enclosed in
parentheses. Parentheses are optional when only the strtcyl
operand is specified. The following are valid entries for one
cylinder warm start areas: SYSWRM= (202, 1) SYSWRM= (202) SYSWRM=202 Use the following formulas to calculate the number of warm start
cylinders required. When you use the formulas, disregard all
remainders. For example, for a 3330 system residence volume plus: • A maximum of 40 spool files in the system at one time • A maximum of 170 cylinders available for spool files • A maximum of 50 active users at one time the calculation is
[59 + 40/40 + 170/170 + 200/50] 65
N
= ---------------------------------= =
57 57 170 IBM VM/370 Planning and System Generation Guide

SYSRES PIacro The following SYSRES macro defines the system residence volume as the
2314 volume with a serial number of CPDSK1. During the system
generation procedure this volume is found at address 230. The VM/370 system starts at cylinder 198, the error r:cording area starts at
cylinder 4, and the warm start storage area 1S cylinder 202 and the
checkpoint start storage area is cylinders 101 and 102. The format of the SYSRES macro is: SYSRES SYSVOL=CPDSK1,SYSRES=230,SYSTYPE=2314,SYSNUC=198, SYSERD=4,SYSWDM=(202,1),SYSCKP=(101,2) The formula for each device type is shown in Figure 21.
r
i Device Type Formula
f I 2314/2319 , N =
(34 + (NSF/40) + (NCS/170) + «NAU x 4) ISO) ] I 32 I f 3340/2305 [26 + (NSF/40) + (NCS/170) + «NAU x 4) ISO) ] I N = , 24 1--------------------------------------------------------------
f 3330 (59 + (NSF/40) + (NCS/170) + (NAU x 4) ISO) ] I N = t 57
1-------------------------------------------------------------- , 3350 (122 + (NSF/40) + (NCS/170) + «NAU x 4)/50) ] , N = I 120 1-------------------------------------------------------------- Iwhere: IN-is the number of cylinders required for warm start data. I INSF I I I INCS , f INAU , I L-- is the maximum number of spool files in the system at any
one time. There are 40 spool file blocks per 4096-byte record.
is the number of cylinders available for spool files. There
are 170 allocation blocks per 4096-byte record.
is the maximum number of active users in the system at any
one time. There are 50 accounting records per 4096-byte record.
Figure 21. Warm start Cylinder Calculations
x
Part 2. Defining Your VPI/370 System 171