Product History
In 1994 DEC sold the Rdb division to Oracle Corporation where it was rebranded Oracle Rdb. Oracle is still enhancing and developing this product in 2011 (although "Oracle Database" products like Oracle 10g get the lion's share of Oracle's advertising budget). It currently runs on OpenVMS for VAX, Alpha and IA-64 (Itanium). It used to run on DEC Tru64 and Microsoft Windows NT, Demand for the Tru64 version was so low that support was dropped. The Microsoft Windows NT port was never released as Oracle could not obtain support on the compilers necessary for this platform.
Rdb featured one of the first cost-based optimizers, and after acquisition Oracle introduced a cost-based optimizer in its regular Oracle RDBMS product.
Read more about this topic: Oracle Rdb
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