Discover the truth about JES2 cold starts and spool data preservation. Get a clear, expert explanation from a mainframe professional.
Table of Contents
Question
JES2 cold starts preserve spool data.
A. True
B. False
Answer
B. False
Explanation
A JES2 cold start does not preserve spool data. When a cold start is performed, it completely reinitializes the JES2 system, wiping out all pre-existing spool data such as output queues, jobs in the system, and system history.
In contrast, a JES2 warm start preserves spool data. With a warm start, JES2 is reinitialized but retains the existing spool files, allowing in-process work to continue from where it left off prior to the restart.
So in summary, the correct answer is B. False – a JES2 cold start does not preserve spool data, but instead clears it to bring the system back to a fresh initial state. Only a warm start maintains the continuity of the spool data.
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