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What are local and global page replacements?
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Answer Posted / hari iitkgp
Replacement algorithm can be local or global : when a
process incurs a page fault, local page replacement
algorithm selects for replacement some page that belongs to
that process (or a group of processes sharing memory
partition), whereas global replacement algorithm is free to
select any page in memory.
Local page replacement assumes some form of memory
partitioning that determines how many pages are to be
assigned to a given process of a group of processes. Most
popular forms of partitioning are fixed partitioning and
balance set algorithm based on the working set model.
Advantage of local page replacement is its scalability: each
process can handle its page faults independently without
contending for some shared global data structure.
| Is This Answer Correct ? | 21 Yes | 3 No |
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