is 3 nodes enough for ceph?

[benoitc]

So I hear many sirens around, and some are saying that using ceph with 3 nodes may not worth it. Either it is too slow or over complicated. Or don’t achieve the goals of having at least 2 nodes working. Is this really the case? Any feedback is welcome

 

[ph0x]

Well, with three nodes you're on the minimum. If one fails there is no other node to take the PGs and Ceph has to put PGs on hosts twice, which it initially tries to avoid.
But if you keep that in mind and don't fill the OSDs for more than 66%, it will work.