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zOS JCL (Job Control Language)
By: Gary Deward Brown , Bruce EldereBook Publisher: John Wiley & Sons
Imprint: John Wiley & Sons, Inc.
Format: Adobe Encrypted (DRM)
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zOS JCL (Job Control Language)
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| Title of Computers eBook: zOS JCL (Job Control Language) | |
| Release Date: 10-15-2002 | |
| Publisher: John Wiley & Sons, Inc. |
This eBook download is available in the following formats:
| Parent title | zOS JCL (Job Control Language) |
|---|---|
| Encrypted (DRM) | Yes |
| SKU | 9780471426738 |
| File size | 3662 |
| Security | n/a |
| Printing | Not allowed |
| Copying | Not allowed |
| Read aloud | No Sys requirements Download reader |
| Devices | Samsung Tablet, Apple Ipad & Iphone, Barnes & Noble Nook, Kobo eReader, Aluratek Libre, Iliad, Nokia, Blackberry, Hanlin |
| Note | Excellent navigation features are available via Adobe such as bookmarks and a quick access table of contents. Text search is easily accessible. An Adobe DRM-protected file is different than a pdf file in that it uses Adobe DRM (Digital Rights Management) technology, which authors and publishers use to protect their content from illegal online distribution and to set certain privileges such as restrictions on copying and printing. |
zOS JCL (Job Control Language)
Chapter One
INTRODUCTION
1.1 THE SHOCK OF JCL
Your first use of JCL (Job Control Language) will be a shock. No doubt you have used personal computers costing $500 or $1,000 that had wonderfully human-engineered software, giving you an expectation of how easy it is to use a computer. Now, as you use a computer costing several million dollars, you may feel like a waif in a Dickens story standing in the shadow of a massive mainframe computer saying meekly, "Please, sir, may I run my job?" It will come as a shock that its software is not wonderfully human engineered.
The hardware and software design of large IBM mainframe computers date back to the days when Kennedy was president. JCL is a language that may be older than you are. It was designed at a time when user-friendliness was not even a gleam in the eye of its designers. This is easily demonstrated by taking the simple task of copying a file and contrasting how it is done through JCL with how it is done on the most popular personal computer system, Windows. To copy a file with Windows, you left-click twice on the MY COMPUTER icon, left-click on the C: drive icon, left-click twice on the folder containing the file, and right-click on the file to copy. On the resulting menu, you click on COPY and then left-click twice on the folder into which you want the file copied. Finally, you right-click inside the folder and select PASTE from the menu and you are done. It is wonderfully intuitive and simple. To do the same thing with JCL, you might write the following, in which old-name names the original file and new-name is the name you select for the copy.
//RT452216 JOB (45992,
...
