Hi Lon, Finally, I adopt this quorum disk configuration : <quorumd interval="1" label="QDISK0" min_score="1" tko="10" votes="1"> <heuristic interval=2 tko="3" program="ping -t1 -c1 172.21.1.12" score=1/> <heuristic interval=2 program="ping -t3 -c1 172.21.1.12" score=1/> </quorumd> I just wonder if the interval values for quorum disk with regard to the one for heuristic is the best choice or not ? And which are the rules to fit the good value for interval and tko on heuristic ? (I don't completely understand why your both heuristics avoids suicide if one ping get lots, it seems to be due to tko value but ... ) Thanks Regards And best whiches for 2008 ;-) Alain Moullé > Also - your heuristic should be more like one of the following: > <heuristic interval="2" > tko="3" > program="ping -t1 -c1 <another host>" > score="1"/> > <heuristic interval="2" > program="ping -t3 -c1 <another host>" > score="1"/> >Reason: You don't want a single ICMP packet to determine node fitness. >If that ping gets lost (network being full, or any reason really), the >node will commit suicide. (The man page probably needs updating about >that!) > Lon -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster