Multicast network emulation

A technology is described for emulating a multicast network. An example method may include receiving a data transaction request at a data store service. The data transaction request may contain a network packet for multicast distribution to destination clients, and the data transaction request may be received from a source client having a multicast conversion driver configured to convert the network packet into a data transaction request format. A determination may be made that the data transaction request is a multicast request to distribute the network packet to the destination clients. Having determined that the data transaction request is a multicast request, destination clients that are subscribed to receive the multicast group communication may be determined. A data record containing the network packet may be distributed to the destination clients, where the destination clients have the multicast conversion driver configured to convert the data record to the network packet.