swapping

                                                                  SWAPPING     Swapping is  a memory management scheme in which any process can be temporarily swapped from main memory to secondary memory so that the main memory can be made available for other processes . Backing store - fast disk large enough to accommodate copies of all memory images for all users ; must provide direct access to these memory images Roll out , roll in - swapping variant used for priority based scheduling algorithms ; lower - priority process is swapped out so higher - priority process can be loaded and executed Major part of swap time is transfer time ; total transfer time is directly proportional to the amount of memory swapped -Swapping consists of bringing in each process in its entirety , running it for a while , then put...