As you increase the number of volumes that DFSMShsm space manages, you might want to change the primary space management or secondary space management processing window, or you might want to add more tasks. This topic describes how to define a new processing window. For more information about adding more tasks, see Specifying the maximum automatic volume space management tasks and subtasks and Specifying the maximum automatic secondary space management tasks.
You can define a new processing window whether primary space management or secondary space management is running or not.
You can change the primary space management or secondary space management processing window at any time, even when primary space management or secondary space management is currently running on a particular DFSMShsm host. Primary space management or secondary space management will run when the new planned start time occurs if the currently running primary space management or secondary space management completes before the planned start time of your newly defined processing window. If the currently running primary space management or secondary space management runs past the new planned start time, primary space management or secondary space management will not start automatically until the next time the planned start time occurs.
If you define a planned start time that is later than the time that primary space management or secondary space management last completed, primary space management or secondary space management starts at the planned start time.
If you define a planned start time that is earlier than the time that primary space management or secondary space management last completed, primary space management or secondary space management does not start until the next time the planned start time occurs on a scheduled day.