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| Introduction |
A relational database management system (RDBMS) is an essential tool in many environments, from the more traditional uses in business, research, and education contexts, to newer applications, such as powering search engines on the Internet. However, despite the importance of a good database for managing and accessing information resources, many organizations have found them to be out of reach of their financial resources. Historically, database systems have been an expensive proposition, with vendors charging healthy fees both for software and for support. In addition, because database engines often had substantial hardware requirements to run with any reasonable performance, the cost was even greater.
In recent years, the situation has changed on both the hardware and software sides of the picture. Personal computers have become inexpensive but powerful, and a whole movement has sprung up to write high-performance operating systems for them that are available for the cost of an inexpensive CD, or even free over the Internet. These include several BSD UNIX derivatives (FreeBSD, NetBSD, OpenBSD) as well as various forms of Linux (RedHat, Caldera, LinuxPPC, to name a few). |
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