> Is having two cluster networks like this a supported configuration? Every osd and mon can reach every other so I think it should be.
Maybe. If your back end network is a supernet and each cluster network is a subnet of that supernet. For example:
Ceph.conf cluster network (supernet): 10.0.0.0/8
Cluster network #1: 10.1.1.0/24
Cluster network #2: 10.1.2.0/24
With that configuration OSD address autodection *should* just work.
> 1. move osd traffic to eth1. This obviously limits maximum throughput to ~100Mbytes/second, but I'm getting nowhere near that right now anyway.
Given three links I would probably do this if your replication factor is >= 3. Keep in mind 100Mbps links could very well end up being a limiting factor.
What are you backing each OSD with storage wise and how many OSDs do you expect to participate in this cluster?
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