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Using the VARY DRDS technique z/OS Communications Server: SNA Network Implementation Guide SC27-3672-01 |
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The VARY DRDS command activates a dynamic reconfiguration (DR) file. ProcedureTake the following steps to use the VARY DRDS command:
ResultsYou can use a dynamic reconfiguration file to:
The NCP to be reconfigured must be active, and the resource to be deleted or moved must be inactive. Also, the NCP cannot recognize, move, or add requests unless the physical unit was active at some time before deactivating it to issue a VARY DRDS command on it. Dynamic reconfiguration with a DR file should be used only as a temporary method; a new NCP should be generated to reflect the changes as soon as time permits. The NCP should be reloaded to reflect the permanent changes. If you are coding a dynamic reconfiguration file:
If the NODELST start option is in effect when you perform a dynamic reconfiguration, VTAM records the name of each dynamic reconfiguration file in the NODELST file. When you restart VTAM after a halt or a failure, you can automatically reapply the changes in the dynamic reconfiguration files by specifying the name of the NODELST file on the CONFIG start option. If a physical unit was dynamically moved before VTAM failed, it cannot be moved during a warm start. The activation of resources precedes the processing of dynamic reconfiguration files during warm start. Because dynamic reconfiguration depends upon resources being inactive, dynamic reconfiguration move operations are not performed. Deactivate the PU and issue the VARY DRDS command again. Note: VARY ACT,UPDATE enables resources to be dynamically reconfigured
and activated on warm start.
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Copyright IBM Corporation 1990, 2014
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