Dynamic device allocation

 

Dynamic device allocation allows you to allocate tape devices as they are needed.

There are three ways to allocate your tape devices.

• All tape devices needed for the save operation are allocated in the beginning.

• Only one tape device is allocated at the beginning of a save operation. The maximum number of devices are allocated when data is ready to be written.

• The number of devices specified for the minimum parallel device resources field is allocated at the beginning of a save operation. Additional devices are allocated when data is ready to be written.

Use the Create Media Definition API to specify your preferred value.

 

Dynamic tape allocation restrictions

• Initially all of the save operations will continue to allocate at least one device. Any operation that does not use a media definition will allocate its device at the beginning of the operation.

• Devices will not be dynamically deallocated.

• The dynamically allocated devices will be limited to these points in time

  • After a save-while-active checkpoint.

  • When the initial library data is ready to be written to an available device.

 

Parent topic:

Saving to multiple devices to reduce your save window