What are local and global page replacements?
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Answer / guest
Local replacement means that an incoming page is brought in
only to the relevant process address space.
Global replacement policy allows any page frame from any
process to be replaced.
The latter is applicable to variable partitions model only.
| Is This Answer Correct ? | 31 Yes | 7 No |
Answer / 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 |
Answer / tanya
local page replacement select for replacement some page that
belong to same process.
global page replacement algo is free to select any page in
memory.
| Is This Answer Correct ? | 16 Yes | 1 No |
Answer / nishant
Global replacement allows a process to select a replacement frame from the set of all frames, even if that frame is currently allocated to some other process; that is; one process can take a frame from another. Local replacement requires that each process select from only its own set of allocated frames.
| Is This Answer Correct ? | 11 Yes | 0 No |
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