Open commit protocols for the tree of processes model

The authors propose three different two-phase commit (2PC) protocols that ensure that, even in the presence of permanent node failures, all sane nodes participating in a particular transaction eventually terminate the transaction in a consistent way. A node is defined to be sane if it eventually recovers from failures. These protocols, called open 2PC protocols, are based on a tree-of-processes model and provide means for transferring the coordinator function within process trees. Besides describing the open 2PC protocols in detail, the authors compare these protocols with regard to their message and time complexity. They also include a discussion of related work