Replicated transactions

A scheme to replicate transactions is described. The scheme allows a k-replicated transaction to survive (k-1) failures. No coordination among the k replicas is needed until one of them reaches the end and proceeds to abort the others. Consequently, the scheme avoids the overhead and delay caused by failure detection reconfiguration, and synchronization during the k replicas´ execution. A robust commit protocol to choose the transaction replica that should be committed and a procedure to choose the nodes on which a transaction replica is executed are described. The goal of the procedure is to maximize reliability