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Single-file Storage Manager

Consider the following simple single-file DBMS layout:

[Diagram:Pics/storage/single-file-example.png]

E.g.

SpaceMap = [ (0,10,U), (10,10,U), (20,600,U), (620,100,U), (720,20,F) ]

NameMap = [ ("employee",20,350), ("project",620,40) ]