Some Examples Of Disk File Setup; Example - IBM 1130 User Manual

Section
Subsections
Page
80
70
I
10 01
SOME EXAMPLES OF DISK FILE SETUP
Example
1.
A program reads a deck of cards and builds two
large tables of data. The individual data items are
of no particular interest; however, after the last
input card has beenprocessed, you want to sum-
marize the data tables and print a summary report.
The data tables required are so large that they can-
not fit in core storage; therefore, you decide to use
the disk as an extension of core storage to accu-
mulate the two tables.
After this job has been run, you have no need for
the data, so you decide to keep it in Working storage
(WS).
Two files are required, numbered 1 and 2, and
any disk cartridge may be used. Each of the two
files contains 100 records of 150 words each.
Since the files are of a temporary nature and
will remain in Working Storage, neither a *STORE-
DATA card nor a *FILES card is required; con-
sequently the files have no names, only numbers.
The next two exhibits show how the Disk File Lay-
out Worksheet would be filled in for these two files.