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db4o in the Mirror of JPA/EJB and Hibernate

When or why should I use an object database?

db4o, an open source object database system with broad industry applicability, belongs to a popular database management systems that has close to 2 million downloads to date. Here we'll illustrate the features and application areas of such a database and compare db4o against relational DBMS/object relational (OR) mappers.

It seems as if object databases are enjoying a rebirth. After the disastrous but probably quite purifying hype of the '90s, many providers now offer sophisticated products. Besides db4o, the products by Intersystems, Objectivity, Gemstone, and Versant deserve to be mentioned. At this point the most important question is: When or why should I use an object database?

More Stories By Stefan Edlich

Stefan Edlich is professor of software engineering at the Technical University of Applied Sciences in Berlin. The focus of his research includes enterprise applications, object databases, and mobile applications. The results of his research have produced many books on open source, Web frameworks, J2EE, and db4o. Stefan is organizing the object database conference ICOODB.org 2008.

More Stories By Daniel Oltmanns

Daniel Oltmanns is a research assistant at the Technical University of Applied Sciences in Berlin and an expert in the field of AJAX-technologies, databases, and Spring-architectures.

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