Marklogic supports ACID transactions. being that it is also a horizontally scalable system, it allows those transactions not just to spawn multiple objects, but

Marklogic supports ACID transactions. being that it is also a horizontally scalable system, it allows those transactions not just to spawn multiple objects, but also across multiple hosts. http://www.marklogic.com/blog/can-you-pass-the-acid-test/ http://www.marklogic.com/blog/can-you-pass-the-acid-test/ They also support data tiering into HDFS, and now most recently RDF with SPARQL They have been doing ACID for a number of years, not sure for how long. They are not free (unless your data set is small)