CPU recommendations

Different Ceph services have different CPU resource requirements, and so does the Ubuntu OS. Below is a summary table of the processor requirements per service type running on a node.

OS/Ceph service	CPU requirements (cores)	Performance notes
Ubuntu Operating System	4
Ceph MON	4	Fast disk (SSD or better)
Ceph OSD	1 per HDD 2–4 per SATA SSD 4–8 per NVMe	1 core per 1,000–3,000 IOPS 1 core per 200–500 MB/s
MDS	4	Single-threaded service. High clock rate (GHz) preferred.
RadosGW	4–16	Can consume up to 16 cores for higher performance (>25 Gbit/s).
NVMe-oF GW	4–30	For a PoC with <10,000 IOPS, 4 cores are the minimum requirement. Values between 200,000 and 300,000 IOPS require 25–30+ cores.