On Sat, 25 Feb 2012, Daniel Pittman <daniel@rimspace.net> wrote:
Adjust the behaviour settings in drbd.conf around split brain; they have a bunch of configuration choices. See the "handlers" in the manual for the situations and responses.
What does drbd consider to be a split brain situation?
If both nodes have been accessed as primary without synchronising with each other. You could test this like: 1. Shut down node B. 2. Make resource primary on node A 3. Write something to the resource 4. Shut down node A 5. Start up node B 6. Make resource primary on node B 7. Write something to the resource 8. Start up node A You'll probably need to do some forcing when you start up node B as it will tend to want to wait for a long time. In any case, your brain will be well and truly split at this point. You could probably construct a few other scenario's too but this should be enough to do your testing. James