> Wenn ich die OSD auf dem kleinsten Server ausser Betrieb nehme (Stop/Out), dann verdoppelt sich die Transferrate.
It starts to rebalance the storage for redundancy once again. If I recall correctly, the specific config here is what node redundancy you are asking for vs. how many nodes are up. E.g., if you have 2-nodes fail redundancy and 5 nodes, it probably won't even blink when one of them goes down. But my experience with Ceph is somewhat outdated already...