May 26, 2018
Generate Globally/Universally Unique Identifiers (GUIDs/UUIDs)
This module provides a framework for generating UUIDs Universally Unique Identifiers, also known as GUIDs Globally Unique Identifiers. A UUID is 128 bits long, and is guaranteed to be different from all other UUIDs/GUIDs generated until 3400 A.D. Currently many different technologies rely on UUIDs to provide unique identity for various software components.
The algorithm for UUID generation, used by this extension, is described in the Internet Draft “UUIDs and GUIDs” by Paul J. Leach and Rich Salz. It provides reasonably efficient and reliable framework for generating UUIDs and supports fairly high allocation rates - 10 million per second per machine, and therefore, is suitable for identifying both - extremely short-lived and very persistent objects on a given system as well as across the network.
WWW http//search.cpan.org/dist/Data-UUID/ WWW http//www.opengroup.org/dce/info/draft-leach-uuids-guids-01.txt