Cassandra
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The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance. Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure make it the perfect platform for mission-critical data. Cassandra's support for replicating across multiple datacenters is best-in-class, providing lower latency for your users and the peace of mind of knowing that you can survive regional outages. Wide column store https://dzone.com/articles/store-semantic-web-triples-into-cassandra https://www.datastax.com/blog/2018/11/getting-started-graphql-and-apache-cassandra