Developers at a major movie producer building Blu-ray authoring software learned that the object-relational map- ping (ORM) technology they used would not scale. The resources required to produce a Blu-ray disc, which can involve as many as 200,000 objects, demanded a fast and reliable database capable of handling an equal number of complex object relationships. What‘s more, the emerging Blu-ray specification itself was in flux, and every change to the spec required a corresponding adjustment to the data model and database schema.

These and other factors led to the selection of Versant's db4o object data- base. "There was no good way to change the data model using the ORM technology," said John Ying, the architect working on Blu-Print, a Windows-based Blu-ray authoring tool. Blu-Print is used by most major movie studios and post-production services companies in the U.S.

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