>Hi >> And thanks Patrick for this detailed answer. >> Bu just a further question : what about the case of cluster >> with only two nodes where the quorum mechanism can't be >> applied : will we be in your second case description too(when >> of the nodes can see any other node) ???? cman has a special "two_node" node which allows the cluster to continue with only one vote. There is simply a race to see which node gets fenced first! >> Or do both nodes will immediately try to fence one each other ? >> Thanks yes! OK thanks Patrick. So to conclude on this point: the only way to avoid this problem in the case of two-nodes cluster is to have a second Ethernet network dedicated to the Heart-Beat of CS4 (so that this network should never be over-loaded), isn't it ? Or do you have any other suggestion ? By the way, which is the value of timeout on Heart-beat check ? and how many times does it try to get the heart-beat in case of timeout ? Thanks again for your answers. Alain Moullé -- mailto:Alain.Moulle@xxxxxxxx +------------------------------+--------------------------------+ | Alain Moullé | from France : 04 76 29 75 99 | | | FAX number : 04 76 29 72 49 | | Bull SA | | | 1, Rue de Provence | Adr : FREC B1-041 | | B.P. 208 | | | 38432 Echirolles - CEDEX | Email: Alain.Moulle@xxxxxxxx | | France | BCOM : 229 7599 | +-------------------------------+-------------------------------+ -- Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster