For many of my use cases, the distributed transaction control is the key feature of any database product. The reason there are so many products out there with s

For many of my use cases, the distributed transaction control is the key feature of any database product. The reason there are so many products out there with simple transaction models is that it is not that hard to write one. It is really hard to do the distributed transaction thing [1] in a horizontally scalable fashion. [1] http://download.oracle.com/docs/cd/A97630_01/server.920/a96521/ds_txns.htm http://download.oracle.com/docs/cd/A97630_01/server.920/a965...