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- Buffers are allocated and managed on a per file instance basis.
- Active instances of the same file are given different buffer pools,
which are independently managed. However, all the file instances share
the same copy of a buffered page whenever possible through a global
table mechanism.
- Locality Set : the buffered pages associated with a file instance.
- Each locality set is managed by a dicipline depending on the intended
usage of the file instance.
- Any page not on any locality set is placed on a global free pool.
- The owner of any page in its locality set is the file instance.
- All buffer pages can be accessed through a global buffer table.
Deepak Kumar Tawri
Wed Apr 21 21:25:41 IST 1999