Most applications need some form of persistence—a way to store the data outside the application for safekeeping.

The most basic way is to write data to the file system, but that can quickly become a slow and unwieldy way to solve the problem.

A full-blown database provides a powerful way to index and retrieve data, but it may also be overkill.
Sometimes, all you need is a quick way to take a freeform piece of information, associate it with a label, stash it somewhere, and pull it back out again in a jiffy.To read this article in full or to leave a comment, please click here(Insider Story)

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