哪位老大了解class，介绍下哈

sh-vagrant

造子系统时，遇到要建class，
一直没接触过这东东，哪位老大懂得介绍下哈

AS400World

说明：
A class object contains the run attributes that control the run-time environment of a
job. IBM-supplied class objects, or classes, meet the needs of both typical
interactive and batch applications.


用法：
Another way you could set up your system so that the operator would run at a
higher priority would be to do the following:
1. Add a routing entry to the subsystem with unique routing data and specify the
QSYS/QCTL class.
2. Create a new job description for the operator, specifying the same unique
routing data that you used on the routing entry.
3. Change the operator’s user profile to specify the new job description.
4. Now when the operator signs on to that subsystem, the job will route using the
QCTL class, which specifies a higher priority than the class used by normal
interactive jobs.