final DataOutputStream dos = new DataOutputStream(out);
final Iterable<Vertex> vertices = graph.getVertices();
for (Vertex vertex : vertices) {
if (counter >= start && counter < end) {
vertexToFaunusBinary.writeVertex(vertex, dos);
if (logger.isDebugEnabled() && counter % WRITE_STATUS_EVERY == 0) {
logger.debug(String.format("Request [%s] at [%s] on the way to [%s].",
requestIdentifier, vertexCount, verticesInSplit));
}