On Mon, Feb 09, 2009 at 03:09:40PM +0530, Romi Verma wrote: > On Mon, Feb 9, 2009 at 2:56 PM, Dejan Muhamedagic <deja...@fastmail.fm>wrote: > > > On Mon, Feb 09, 2009 at 02:16:42PM +0530, Glory Smith wrote: > > > On Mon, Feb 9, 2009 at 2:06 PM, Dejan Muhamedagic <deja...@fastmail.fm > > >wrote: > > > > > > > Hi, > > > > > > > > On Mon, Feb 09, 2009 at 01:26:56PM +0530, Glory Smith wrote: > > > > > Hi All, > > > > > Anybody worked on stonith external/sbd?? if yes please reply to my > > > > following > > > > > mail. > > > > > > > > > > On Fri, Feb 6, 2009 at 2:27 PM, Glory Smith <xx2gl...@gmail.com> > > wrote: > > > > > > > > > > > Hi All, > > > > > > I am New to this list. i have few questions related to stonith > > > > external > > > > > > sbd plugin . > > > > > > > > > > > > i saw that document says that read/write to thd sbd device is > > single > > > > point > > > > > > of failure . if we configure multipath then this should not be SPOF > > > > anymore > > > > > > . Right?? > > > > > > > > Right. Provided your local rat community doesn't consider the > > > > cables edible. > > > > > > > > > > it says that other nodes can write fence request to the errant > > node's > > > > > > mailbox and the errant node gets fenced. > > > > > > can any one explain when it will happen . > > > > > > > > Whenever the CRM decides a node should be fenced. It has nothing > > > > to do with sbd. > > > > > > > > > > According to my understanding so far, as long as the node is having > > > > access > > > > > > to sbd device it will not get fenced and once it looses access to > > the > > > > sbd > > > > > > device it will reset itself . so when other nodes will get chance > > to > > > > fence > > > > > > a node by writing fence request? > > > > > > > > Not true. A node may also get a "poison pill" from another node, > > > > just as you mentioned yourself in the previous paragraph. > > > > > > > > > As you said if CRM decides a node should be fenced it will be fenced and > > it > > > has nothing to do with sbd. > > > > Right. The decision itself has nothing to do with sbd. sbd is > > just an executioner. > > > > > so in this case cluster must need an another > > > stonith to provide fencing of errant node. is my understanding is > > correct. > > > > No. > > > > > can you explain a bit more , how CRM decide that a node should be fence ? > > is > > > it when node become unreachable.?? > > > > Yes. Also if a resource can't be stopped on that node. > > > > sorry to interrupt in between. just one question from my side. if > no-quorum-policy is set to freeze then resource is not supposed to stop .
right. > in > that case node will not be fenced right?? no-quorum-policy has nothing to do with fencing. Thanks, Dejan _______________________________________________ Pacemaker mailing list Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker
