"perf schema" has a description field that may or may not contain additional information. My best guess for these fields would be bytes read/written since startup of this particular librbd instance. (Based on how these counters usually work) Paul -- Paul Emmerich Looking for help with your Ceph cluster? Contact us at https://croit.io croit GmbH Freseniusstr. 31h 81247 München www.croit.io Tel: +49 89 1896585 90 On Thu, Jan 31, 2019 at 3:41 PM Sinan Polat <sinan@xxxxxxxx> wrote: > > Hi, > > I finally figured out how to measure the statistics of a specific RBD volume; > > $ ceph --admin-daemon <path to .asok> perf dump > > > It outputs a lot, but I don't know what it means, is there any documentation about the output? > > For now the most important values are: > > - bytes read > > - bytes written > > > I think I need to look at this: > > { > "rd": 1043, > "rd_bytes": 28242432, > "rd_latency": { > "avgcount": 1768, > "sum": 2.375461133, > "avgtime": 0.001343586 > }, > "wr": 76, > "wr_bytes": 247808, > "wr_latency": { > "avgcount": 76, > "sum": 0.970222300, > "avgtime": 0.012766082 > } > } > > > But what is 28242432 (rd_bytes) and 247808 (wr_bytes). Is that 28242432 bytes read and 247808 bytes written during the last minute/hour/day? Or is it since mounted, or...? > > > Thanks! > > > Sinan > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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