Dear fellow cephalopods, does anyone have any pointers on how to instrument librbd as-driven-by qemu IO performance from a hypervisor? Are there less intrusive ways than perf or equivalent? Can librbd be told to dump statistics somewhere (per volume) - clientside? This would come in real handy whilst debugging potential performance issues troubling me. Ideally I'd like to get per-volume metrics out that I can submit to InfluxDB for presentation in Graphana. But I'll take anything. Best, Martin
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