Whats all the fuss about JES3?

One Man’s Experience with JES2 and JES3

By Stephen Force

JES3 is a very complex MVS Job Entry subsystem (JES). It offers more to the MVS operating system than JES2 offers, but for a price. Because JES3 has more control over devices and job control than JES2, it follows that the complexity of potential problems increase.

The purpose of this article is to help JES2 users better understand JES3. It is not intended to be a JES3 primer nor to be considered an i-depth critique of JES. However, some knowledge of JES is helpful in understanding various technical references.

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