Hi, We are planning to make sf-ex into a quorum plugin, but It might take a while because we aren't really familiar with it. Your continued support will be greatly appreciated.
as for RA, last come, last served, let's see, the last node which can update the reserve status is going to win the right to run resources, won't work at all? Thanks, Junko Ikeda NTT DATA INTELLILINK > I believe that the point he was trying to make is that it _needs_ the > complexity of the logic to be always correct even in the split-brain > case - and I agree. > > If this logic fails and both sides think they have exclusive access in a > split-brain case, then a filesystem on disk may be destroyed. This is a > _very_ bad consequence - much worse than a crash. It doesn't matter if > it is relatively unlikely, because the consequence is so terrible. With > hundreds of thousands of clusters running Heartbeat, even unlikely > events eventually happen. > http://linux-ha.org/BadThingsWillHappen > > You should be able to run hundreds of thousands or millions of tests > where both sides are trying to get the lock at the same time, and be > able to verify that only one side got the lock - in every single case. > > Please don't be discouraged. Horms started a similar effort a few years > ago, but he wasn't able to spend enough time with it to get it right. > > What you're doing is a valuable thing to do, and we all understand very > well that it's difficult. > > When I first entered this discussion, I mentioned lockless > synchronization algorithms as being good things to study. In this case, > we are trying to create a lock, but I suspect the lockless methods would > be a good way to synchronize the creation of a lock (even though this > sounds odd). > > -- > Alan Robertson <[EMAIL PROTECTED]> > > "Openness is the foundation and preservative of friendship... Let me > claim from you at all times your undisguised opinions." - William > Wilberforce > _______________________________________________________ > Linux-HA-Dev: [email protected] > http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev > Home Page: http://linux-ha.org/ _______________________________________________________ Linux-HA-Dev: [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev Home Page: http://linux-ha.org/
