可以处理大型RDF数据集的企业级数据库？

Are there any enterprise-grade database engines (Oracle, MS SQL...etc) that can handle large RDF datasets (320 million) and SPARQL queries? I guess my question is also: is SPARQL/RDF/OWL ready for serving large real-world data warehouses for an enterprise? If not, are there efficient mechanisms for adapting SPARQL/RDF against a typical data warehouse star schema.Are there any enterprise-grade database engines