There are different possibilities for realizing concurrent changing of replicas, depending on the scenario’s topology and with different trade-offs. Using a central server The most common scenario is a central server that all clients have to communicate with. The server could keep track of how the document of each participant looks. Both A and B … Read more
Both approaches are similar in that they provide eventual consistency. The difference is in how they do it. One way of looking at it is: OT does it by changing operations. Operations are sent over the wire and concurrent operations are transformed once they are received. CRDTs do it by changing state. Operations are made … Read more
I think that parts of Google Wave’s OT implementation are Open Source (and more parts are coming). I’m not sure if this is what you are looking for, but an alternative to OT is Differential Synchronization: Google-Diff-Match-Patch – Diff, Match and Patch libraries for Plain Text: “The Diff Match and Patch libraries offer robust algorithms … Read more