Bumper: Sheltering distributed transactions from conflicts

Large scale cloud applications are difficult to program due to the need to access data in a consistent manner. To lift this burden from programmers, Deferred Update Replication (DUR) protocols provide serializable transactions with both high availability and performance in read-dominated workloads. However, the inherently optimistic nature of DUR protocols makes them prone to thrashing in conflict-intensive scenarios: existing DUR schemes, in fact, avoid any synchronization during transaction execution; thus, these schemes end up aborting any update transaction whose reads are no longer up to date by the time it attempts to commit.