dets

dets

Module

dets

Module summary

A Disk Based Term Storage

Description

The module dets provides a term storage on file. The stored terms, in this module called objects, are tuples such that one element is defined to be the key. A Dets table is a collection of objects with the key at the same position stored on a file.

Dets is used by the Mnesia application, and is provided as is for users who are interested in an efficient storage of Erlang terms on disk only. Many applications just need to store some terms in a file. Mnesia adds transactions, queries, and distribution. The size of Dets files cannot exceed 2 GB. If larger tables are needed, Mnesia's table fragmentation can be used.

There are three types of Dets tables: set, bag and duplicate_bag. A table of type set has at most one object with a gi