On Thu, 2005-08-04 at 12:32 +0400, Denis Medvedev wrote: > >The main advantage that "automatic" fencing gives you over manual fencing is > >that in the event that a fencing operation is required, your cluster can > >automatically recover (on the order of seconds to minutes) instead of waiting > >for user intervention (which can take minutes to hours to days depending on > >how attentive the admins are :). > > > > > > > "recover"? You mean reboot? But if a machine need fencing, doesn't that > mean that something is inherently wrong with that machine and simple > reboot would't cure that? recovery = The *cluster* can continue operation, not the *node*. If the node is truly dead (maybe its CPU was fried from a bolt of lightning), rebooting it doesn't hurt it. If it was just a software or network issue (e.g. kernel panic, router glitch), then the node should be able to recover after its reboot and rejoin the cluster. -- Lon -- Linux-cluster@xxxxxxxxxx http://www.redhat.com/mailman/listinfo/linux-cluster
