On Wed, Mar 19, 2008 at 3:20 AM, Atanas Dyulgerov <[EMAIL PROTECTED]> wrote: > > > -----Original Message----- > From: Lars Marowsky-Bree [mailto:[EMAIL PROTECTED] > Sent: Tuesday, March 18, 2008 4:59 PM > To: The Pacemaker cluster resource manager > Subject: Re: [Pacemaker] Does pingd works on openais? > > On 2008-03-10T11:13:51, Atanas Dyulgerov <[EMAIL PROTECTED]> wrote: > > >> STONITH brutally shutdowns a node. To do that you need redundant > >> communication lines, smart power devices and definitely a local > >> cluster. For geographically separated cluster with remote nodes > >> STONITH is not applicable. The method is called Node Fencing and as I > >> said it has too many obstacles. > > > >All fencing methods require a means of communicating with the device; in > >case of WAN clusters, the link between the (replicating) storage arrays > >(for example) will also be cut - resource fencing is unavailable for the > >same reasons as STONITH is. > > The case when node loses connectivity to the cluster but it still remains > connected to the shared resource. Then the other nodes which retain quorum > can lock the shared storage resource to stop the errant node from accessing > it. This fencing method does not require communication with the failed node. > That's what RHCS do I believe.
I don't know about RHCS 4.0 but 3.0 used to kill a diconnected node. In fact it was shipped with a STONITH module :-) HP ServiceGuard,Veritas VCS and Oracle RAC killed a failed node as well. Though it was done through halt on a disconnected node when it wasn't able to lock a shared device. -- Serge Dubrouski. _______________________________________________ Pacemaker mailing list Pacemaker@clusterlabs.org http://list.clusterlabs.org/mailman/listinfo/pacemaker
