Hi all, I have a quick question about the RBD kernel module - how to best collect the metrics or perf numbers? The command 'ceph -w' does print some useful event logs of cluster-wide while I'm interested in per-client/per-image/per-volume read/write bytes and latency etc.
For the *librbd*, I found the admin socket is very handy. However, this seems not an option for *krbd* kernel module (correct me if I'm wrong). I found when loading one kernel module or mapping an image, there are some related system message readable via *dmesg*. But I did not find any logs about read/write. Any pointers? Thanks,
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