A method, an apparatus, and a computer program product for accelerating network data transfer are provided. In one aspect, a plurality of data streams are received at a local host, combined into a single stream and divided into fragments including one or more segments. The fragments are each stored in buffers and processed in parallel by a plurality of worker threads. Each fragment is encoded and packetized into a data packet. The data packets are transmitted over a network to a remote host as a plurality of parallel data streams over at least one data link. As buffer locations become available, additional fragments are stored in the buffer and processed on a substantially ongoing basis for transmission over the network.