I run a (production) 4-node cluster without QDevice.
In this forum and on www.reddit.com/r/Proxmox the common opinion seems to be that such a cluster (or any even one) will go into spilt-brain (i.e. multiple independently active partitions) under some unspecified circumstances. I never find any details. Just the claim that it's well documented / known.
But from what I understand of proxmox and it's default configuration this should not be possible. The worst case I can find is all nodes going down. Which is much better compared to split-brain wrecking my data.
E.g. in a 2 + 2 (n/2 + n/2) partition neither got the required 3 (n/2 + 1) votes needed for a corosync quorum and both go down.
Is there something wrong in my understanding of proxmox or corosync_votequorum? A bug? Is the claim simply wrong?
In this forum and on www.reddit.com/r/Proxmox the common opinion seems to be that such a cluster (or any even one) will go into spilt-brain (i.e. multiple independently active partitions) under some unspecified circumstances. I never find any details. Just the claim that it's well documented / known.
But from what I understand of proxmox and it's default configuration this should not be possible. The worst case I can find is all nodes going down. Which is much better compared to split-brain wrecking my data.
E.g. in a 2 + 2 (n/2 + n/2) partition neither got the required 3 (n/2 + 1) votes needed for a corosync quorum and both go down.
Is there something wrong in my understanding of proxmox or corosync_votequorum? A bug? Is the claim simply wrong?
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