Azure Microsoft Cosmos DB
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https://www.zdnet.com/article/inside-cosmos-db/ Advanced features as PolyBase (which allows SQL Server to treat files in Hadoop and Azure Blob Storage as if they were local tables) and In-Memory OLTP (originally code-named "Hekaton"). https://stackoverflow.com/questions/56872883/is-it-possible-to-use-ontologies-with-cosmosdb cosmos db only has 5 api so far : SQL API,Mongo API,Table API,Graph API(for apache gremlin) and Cassandra API. It doesn't support storing any data with RDF model. Azure Cosmos DB™ is Microsoft's globally distributed, multi-model database service for mission-critical applications. Azure Cosmos DB provides turn-key global distribution, elastic scaling of throughput and storage worldwide, five well-defined consistency levels, and guaranteed high availability, all backed by industry-leading SLAs. It is multi-model with support for the Gremlin graph traversal language.