Data Types in Riak by Gordon Guthrie [slideshare link at description]
http://www.slideshare.net/BigDataSpai...
CRDTs are used to replicate data across multiple computers in a network, executing updates without the need for remote synchronisation. This leads to merge conflicts in systems using conventional eventual consistency technology, but CRDTs are designed such that conflicts are mathematically impossible. Under the constraints of the CAP theorem they provide the strongest consistency guarantees for available/partition-tolerant (AP) settings.