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Buffer Pool (cont)

Access methods manipulate pages filled with tuples
  • could be achieved via get/put_page() operations
Interface becomes request/release rather than get/put
  • many relational ops work as
    • get, process, [write], get, process, [write], get, process, ...
  • with a buffer pool, relational ops become
    • request, process, release, request, process, release, ...
    • where only some of the requests result in read
    • where only some of the releases result in write