On Thu, Jan 31, 2019 at 12:16 PM Paul Emmerich <paul.emmerich@xxxxxxxx> wrote: > > "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) Correct -- they should be strictly increasing while the image is in-use. If you periodically scrape the values (along w/ the current timestamp), you can convert these values to the rates between the current and previous metrics. On a semi-related subject: the forthcoming Nautilus release will include new "rbd perf image iotop" and "rbd perf image iostat" commands to monitor metrics by RBD image. > 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 -- Jason _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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