On Thu, 2005-09-01 at 06:47 +0000, nattapon viroonsri wrote: > >From config menu in Rhcs4 look like dont require share storage to store > quorum partion and no ip tie-breaker to config. > And i use only 1 network cable both for client access resource and > heartbeat channel. > So if one node have problem with network connection. the backup node can > provide service with uninterrupt. > But Can split brain will occur ? > Can both node issue i/o to share at the same time ? > > So hould i use 2 heartbeat channel ? > If i use 2 heartbeat connection how can i detect fail of network connection > for client access resource ( no ip tie-breaker to config in rhcs4) ? CMAN (the cluster manager) ensures no split brain via fencing: If you have two nodes and disconnect the cable on one of them, the remaining (connected) node will fence the node which was disconnected. To use it, you need two_node=1 and expected_votes=1 in cluster.conf (which system-config-cluster correctly sets up for you). As stated previously: Fencing hardware is *required* for RHCS4. -- Lon -- Linux-cluster@xxxxxxxxxx http://www.redhat.com/mailman/listinfo/linux-cluster
