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The CDAM subsystem must be active on every CPU from which you want to create compressed datasets. The CDAM subsystem should remain active 24 hours a day. It should be activated as part of the IPL procedures (for details, see the Control-D and Control-V chapter in the INCONTROL for z/OS Administrator Guide). If you want to create CDAM datasets or perform online viewing in a multi-CPU environment, you must ensure that the CDAM subsystem is active on all CPUs involved.
Figure 36 CDAM Subsystem
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