Sharing
In multi-programming or in multi-user environment it is common for many users to be executing the same program. If individual copies of these programs were given to each user, much of the primary storage would be wasted. Its solution is to share those pages that can be shared.
Sharing must be carefully controlled to prevent one process from modifying data that another process is accessing. In most systems the shared programs are divided into separate pages i.e. coding and data are kept separate. This is achieved by having page map table entries of different processes point to the same page frame, that page frame is shared among those process.
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Famous quotes containing the word sharing:
“So close is the bond between man and woman that you can not raise one without lifting the other. The world can not move ahead without woman’s sharing in the movement, and to help give a right impetus to that movement is woman’s highest privilege.”
—Frances Ellen Watkins Harper (1825–1911)
“To see ourselves as others see us can be eye-opening. To see others as sharing a nature with ourselves is the merest decency. But it is from the far more difficult achievement of seeing ourselves amongst others, as a local example of the forms human life has locally taken, a case among cases, a world among worlds, that the largeness of mind, without which objectivity is self- congratulation and tolerance a sham, comes.”
—Clifford Geertz (b. 1926)
“It is easy to see that what is best written or done by genius in the world, was no man’s work but came by wide social labor, when a thousand wrought like one, sharing the same impulse.”
—Ralph Waldo Emerson (1803–1882)