Consider taking a closer look at NuoDB. It has MVCC and an interesting distributed objects architecture for elastic scale out. http://www.nuodb.com/techblog/2

Consider taking a closer look at NuoDB. It has MVCC and an interesting distributed objects architecture for elastic scale out. http://www.nuodb.com/techblog/2013/03/13/mvcc-part-2-pretty-pictures-and-some-examples/ http://www.nuodb.com/techblog/2013/03/13/mvcc-part-2-pretty-... MVCC doesn't solve all concurrent access conflicts, only certain read-write ones, but snapshot isolation works well for many types of workloads.