On 9/03/19 10:07 PM, Victor Hooi wrote: > Hi, > > I'm setting up a 3-node Proxmox cluster with Ceph as the shared storage, > based around Intel Optane 900P drives (which are meant to be the bee's > knees), and I'm seeing pretty low IOPS/bandwidth. We found that CPU performance, specifically power state, settings played a large part in latency, and therefore IOPS. This wasn't too evident with spinning disks, but makes a large percentage difference in our NVMe based clusters. You may want to investigate setting processor.max_cstate=1 or intel_idle.max_state=1, whichever is appropriate for your CPUs and kernel, in the boot cmdline. -- David Clarke Systems Architect Catalyst IT
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