Sunday, September 28, 2008

What is an Online Directory & Why is it used?

A directory is a way in which complex information is organized making it easy to find e.g employees in a company,books in a library,etc
An online directory is a specialized database that stores & retrieves collections of information about objects. Although an online directory is a database—that is, a structured collection of data—it is not a relational database. The following points contrasts online directories with relational databases.
  1. The online directory is primarily read focussed whereas the relational database is primarily write-focussed
  2. Online directory is designed to handle simple transactions on small units of data while RDB handles large transactions on large data
  3. Online directory is designed to store information in entries while RDB is designed to store information in rows in relational tables.

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