DARE: High-Performance State Machine Replication on RDMA Networks

The increasing amount of data that needs to be collected and analyzed requires large-scale datacenter architectures that are naturally more susceptible to faults of single com-ponents. One way to offer consistent services on such unre-liable systems are replicated state machines (RSMs). Yet, traditional RSM protocols cannot deliver the needed latency and request rates for future large-scale systems. In this pa-per, we propose a new set of protocols based on Remote Direct Memory Access (RDMA) primitives. To asses these mechanisms, we use a strongly consistent key-value store; the evaluation shows that our simple protocols improve RSM performance by more than an order of magnitude. Further-more, we show that RDMA introduces various new options, such as log access management. Our protocols enable op-erators to fully utilize the new capabilities of the quickly growing number of RDMA-capable datacenter networks. Categories and Subject Descriptors C.4 [Performance of Systems]: Performance attributes; Fault toleranc