> Doubling a data address as a test address isn't possible in the current > Clearview architecture, as you've clearly stated. So I don't see a way > out of it. > > My objection to using anon groups is that we would have two different > schemes in cluster, one for singleton groups, and the other for > multi-adapter groups. It gets messy when the user adds an adapter or > removes an adapter and is forced therefore to move between the two > schemes.
Good point. > Yes. When a group fails, the application gets failed over to a > different node. This usually incur extra outage and users want to to > keep the app on the original node as much as possible. So they would > typically put two NICs in the group. I see. So the core question becomes: is it reasonable to require Sun Cluster users to configure an additional test address if they want probe-based failure detection (in addition to the link-based failure detection which is always available). If it's not reasonable, then the Clearview team has some "interesting" engineering challenges ahead of us ;-) -- meem
