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Dynamic Partitioning
nPartitions are of variable length and
number
nEach process is allocated exactly as much memory as it
requires
nEventually
holes are formed in main memory. This is called external fragmentation
nMust
use compaction to shift
processes so they are contiguous and all free memory is in one block
nUsed in IBM’s OS/MVT (Multiprogramming with a Variable
number of Tasks)