mainframe - 为什么 StEPLIB 总是覆盖 JCL 中的 JOBLIB？

Question

关闭。这个问题是opinion-based .它目前不接受答案。












想改善这个问题吗？更新问题，以便可以通过 editing this post 用事实和引文回答问题.

7年前关闭。




Improve this question




在 JCL 中，STEPLIB 总是覆盖 JOBLIB。谁能解释为什么会这样？

Answer 1

以下是 IBM 手册的摘录，并解释了 Joblib DD 语句的作用以及 Steplib DD 语句如何与 Joblib 语句交互。

Use the JOBLIB DD statement to:

• Create a private library.

• Identify a private library that the system is to search for the program named in each EXEC statement PGM parameter in the job. Only if the system does not find the program in the private library, does it search the system libraries.

Relationship of a STEPLIB to a JOBLIB

Use a JOBLIB DD statement to define a private library that the system is to use for an entire job. If you include a JOBLIB DD statement for the job and a STEPLIB DD statement for an individual job step, the system first searches the step library and then the system library for the program requested in the EXEC statement. The system ignores the JOBLIB library for that step.