chapter03 cluster_Nodes cluster_0 cluster_1 Start1 Start Con_2 #1 Con_2->Start1 Con_3 #2 Con_3->Start1 Con_5 #3 Con_5->Start1 Add6 Add Add6->Con_2 Add6->Con_5 scope0 0 a b c scope0:scope0_a->Con_2 scope0:scope0_b->Con_3 scope0:scope0_c->Add6 scope1 1 b scope1:scope1_b->Con_5