Glossary 481
dummy device. A device address with no real I/O
device behind it. Input and output for that device
address are spooled on disk.
dump. A report showing the contents of storage.
Dumps are typically produced following program
failures, for use as diagnostic aids.
dynamic allocation. Assignment of system
resources to a program at the time the program is
executed rather than at the time it is loaded into
central storage.
dynamic class table. Defines the characteristics of
dynamic partitions.
dynamic partition. A partition created and activated
on an as needed basis that does not use fixed static
allocations. After processing, the occupied space is
released. Contrast with static partition.
dynamic reconfiguration. The ability to make ...