A node has at least one memory module comprising at least one reflective memory region configured to reflect at least one reflective memory region of one or more other nodes, and the node and the one or more other nodes being configured to communicate on a packet-based serial point-to-point topology network. The node also comprises at least one network switch configured to provide at least two links each configured to connect to at least one non-host peer node on the network, multicast to the one or more other nodes at least one change to the at least one reflective memory region, receive from the one or more other nodes at least one other change to the at least one reflective memory region, and communicate to the at least one memory module the received at least one other change to the at least one reflective memory region.
