> This is true even if I manage locking at application level (via virlock > or sanlock)?
Yes. Gluster has it's own quorum, you can disable it but that's just a recipe for a disaster. > Also, on a two-node setup it is *guaranteed* for updates to one node to > put offline the whole volume? I think so, but I never took the chance so who knows. > On the other hand, a 3-way setup (or 2+arbiter) if free from all these > problems? > Free from a lot of problems, but apparently not as good as a replica 3 volume. I can't comment on arbiter, I only have replica 3 clusters. I can tell you that my colleagues setting up 2 nodes clusters have _a lot_ of problems.
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