On 03/30/2014 05:51 PM, Richard Pieri wrote:
A more detailed plan for the basic Xen + checkpoint + DRBD configuration I described.
I played with Xen back when, but I didn't like the too-tight coupling between the host and guest OSs. I forget what burned me but I upgraded something (the host?) and the guest quit working. Admittedly, this was a long time ago, things might have gotten better since, but para-virtualization isn't as flexible as complete virtualization. And originally my idea was for a bunch of archaic MS Windows servers--I don't think old MS Windows can run under Xen.
It also has the same flaw: split brain.
Split brain is a problem, but in my case I was looking for something that fit a single-rack, or now just in my house. In both cases I am assuming the ethernet cable between the two different boxes is one of the most reliable parts of the whole rig. Heck, I hadn't even gotten to automatic failover. A big win was no longer having a single point of "Nyah-nyah, it will take you *weeks* to get back up and running!"-failure that I was trying to fix in the original MS Windows server setup.
For basement server playing a thousand dollars buys a pretty capable collection of toys. Too bad time in the dearer resource.
There's no quorum, and you can't get a quorum with DRBD.
There is a non-free DRBD that handles more than two nodes. There might be something useful down that path.
-kb _______________________________________________ Discuss mailing list Discuss@blu.org http://lists.blu.org/mailman/listinfo/discuss
