Updating inverted file index using multi tier

25-Sep-2015 06:18

updating inverted file index using multi tier-18

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And that is the difference between the logical and physical organisation of the data.On the whole a file structure will specify the logical structure of the data, that is the relationships that will exist between data items independently of the way in which these relationships may actually be realised within any computer.

Typically for every unit of physical store there will be a number of units of the logical structure (probably records) to be stored in it.For example, if we were to store a tree structure on a magnetic disk, the physical organisation would be concerned with the best way of packing the nodes of the tree on the disk given the access characteristics of the disk.