<div dir="auto"><div><div><div dir="auto">Hello,</div><div dir="auto"><br></div><div dir="auto">Personally I'm using option (a) on a 3 node proxmox cluster and drbd9. Replica count per VM is 2 and all 3 nodes act as both drbd control volumes and satellite nodes.I can live migrate VM between all nodes and snapshot them by using drbdmanage utility (which is using zfs snapshot+clones).</div><div dir="auto"><br></div><div dir="auto">Option (b) seems more suitable for a 2 node drbd8 cluster in a primary/secondary setup. Haven't tried it so I cannot tell if there are any clurpits. My only concern in such setup would be if drbd corrupts silently the data on the lower level and zfs is not aware of that.Also, if you are *not* going to use live migration, and you can afford loosing some seconds of data on the secondary node in favor of better performance on the primary node, then you could consider using protocol A instead of C for the replication link.</div><div dir="auto"><br></div><div dir="auto">Yannis</div><div dir="auto"><br></div><div dir="auto"><br></div><div class="gmail_quote"><div>On Fri, 18 Aug 2017 at 15:16, Gionatan Danti <<a href="mailto:g.danti@assyoma.it" target="_blank">g.danti@assyoma.it</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Il 18-08-2017 12:58 Julien Escario ha scritto:<br>
> If you design with a signle big ressource, a simple split brain and<br>
> you're screwed.<br>
><br>
> Julien<br>
<br>
Hi, I plan to use a primary/secondary setup, with manual failover.<br>
In other words, split brain should not be possible at all.<br>
<br>
Thanks.<br>
<br>
--<br>
Danti Gionatan<br>
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