[TUTORIAL] FabU: can I use Ceph in a _very_ small cluster?

[LnxBil]

in our network and setup we eliminates all single point failure - sleep better at night

Yes and having more than any one device fault tolerance will you even sleep better. Therefore 5 instead of 3 nodes as a sane minimum for this. If you only want to have no SPOF (so any one device fault tolerance), 3 will also be OK IMHO.

 

[Johannes S]

Maybe this is something which might be added as a link or of interest for some of you: CERN ETH Zürich did a talk on benchmarking Ceph and it's difficulties in preparing for the real world on this years fosdem in Brussel:
https://fosdem.org/2025/schedule/ev...etic-benchmarks-to-real-world-user-workloads/
There were also some other talks on Ceph (although I didn't manage to get a seat, the room was quite small unfortunely): https://fosdem.org/2025/schedule/room/k3401/


Edit: Wasn't CERN but ETH Zürich, I mixed them up (due to both institutions being in Switzerland I suspect)

 

[UdoB]

link or of interest

Thanks, I've added it. And I've downloaded but not seen it yet. All in all there seem to be 793 recordings from Fosdem - and Ceph is not the only interesting topic...