Beginnerz/OS28 min
z/OS fundamentals
The operating system almost all of this runs under: how work is isolated, how it gets scheduled, and how you watch it happen.
What you will be able to do
- Describe what an address space is and why it matters
- Explain how a submitted job becomes running work
- Find a job's output and read its messages
Lessons
- What z/OS does for youz/OS is the operating system. Like any operating system it decides who runs, who gets memory, and who is allowed to touch what. The differences from Windows or Linux are in the…
- How a job becomes running work: JES2When you submit a batch job, it does not start immediately. A component called the job entry subsystem takes it in, queues it, decides when to run it, collects its output and…
- SDSF: watching the systemSDSF is the panel where you find your job, read its output, look at what is running, and issue operator commands if you are allowed. If you learn one z/OS tool early, learn this…
- Reading z/OS messages and codesz/OS tells you what happened in a very consistent format. Once you can decode a message ID and a completion code, the system stops feeling cryptic and starts feeling verbose but…
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Free account, 306 quiz questions for this subject.