Extending the Intelligent Adaptive Participant’s Presumption Protocol to the Multi-level Distributed Transaction Execution Model

The “intelligent adaptive participant’s presumption protocol” (iAP 3 ) is an integrated atomic commit protocol. It interoperates implicit yes-vote, which is a one-phase commit protocol, besides presumed abort and presumed commit, the most commonly pronounced two-phase commit protocol variants. The aim of this combination is to achieve the performance advantages of one-phase commit protocols, on one hand, and the wide applicability of two-phase commit protocols, on the other. iAP 3 interoperates the three protocols in a dynamic fashion and on a per participant basis, in spite of the incompatibilities among the three protocols. Besides that, the protocol is backward compatible with the standardized presumed abort protocol. Whereas iAP 3 was initially proposed for the two-level (or flat) transaction execution model, this article extends the protocol to the multi-level distributed transaction execution model, the model adopted by the database standards and widely implemented in commercial database systems. Thus, broadening the applicability scope of the iAP 3 .