какие сноски? не могу найти
For example, suppose a five-node multi-master cluster experienced a network failure that split the network into two isolated subnets, with two and three cluster nodes. Based on heartbeats propagation information, multimaster will continue accepting writes at each node in the bigger partition, and deny all writes in the smaller one. Thus, a cluster consisting of 2N+1 nodes can tolerate N node failures and stay alive if any N+1 nodes are alive and connected to each other.