JES3 spool data management
In JES3 spool data management is defined as the recording and retrieval of data on the spool data set and the management of space within the spool data set.
The spool serves:
For jobs in execution as a buffer between input devices and routines that read input data, and between routines that write output data and output devices
As a storage place for the control blocks and data that JES3 needs to process jobs.
A spool must be allocated on a DASD device. Transfer of job data to and from the spool device is called ...

Get ABCs of z/OS System Programming Volume 13 now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.