In a two node situation, if the nodes miss network hbs, but still can see each other on disk, the higher node will fence itself.
Weller, Michael wrote: > Dear List, > > I now have a different problem, which might cause us to stop using > o2cfs. > > We still have two HP-machines, redundantly connected to an HP-san with > an EVA 6000. Each has two network cards which are bundled with bonding.o > as active-standby. They are connected to a switch. > > Now, if there is a problem with the network, or if one machine is > disconnected from the switch: Both machines are self-fencing! > > Installed are: > rhenad:~ # rpm -q ocfs2-tools > ocfs2-tools-1.1.4-0.5 > rhenad:~ # rpm -q ocfs2console > ocfs2console-1.1.4-0.5 > > We cannot really make an update, at least not a kernel update, as we > will loose SAN certification and experiments show, that the SAN and > failover won't work than. Oh yes, all this is from SLES9 SP3 > > Question: Of course, our main idea to use ocfs was, that if one node > crashes or looses network connection or something, that the other one > survives. At the moment it seems, that if one node has problems, both > are self-fencing. > > What is the official opinion here, and what can we do to address that > problem? > > Would having each link of the fault-tolerent pairs on a different lan > switch (for redundancy) help? This way, a lan-switch lockup (as it > happened on us) won't be a problem, however, if one(!) machine crashes > or looses network connection, is there a chance for an ocfs2 cluster to > survive? > > Thanks in advance, > Michael. > > --- > > Dr. Michael Weller > > ITZ Informationstechnologie GmbH > Consulting/Systemengineering > Bismarckstrasse 57 > D-45128 Essen > > Phone Office +49 201 24714 28 > FAX Office +49 201 24714 33 > Phone Mobile +49 172 2178078 > E-Mail mailto:[EMAIL PROTECTED] > > > > ------------------------------------------------------------------------ > > _______________________________________________ > Ocfs2-users mailing list > [email protected] > http://oss.oracle.com/mailman/listinfo/ocfs2-users > _______________________________________________ Ocfs2-users mailing list [email protected] http://oss.oracle.com/mailman/listinfo/ocfs2-users
