Hi Dan, thank you very much for the script, will check it out...no thortling so far, but I guess it will have to be done... This seems to read only gziped logs? so since read only I guess it is safe to run it on proudction cluster now... ? The script will also check for mulitply OSDs as far as I can understadn, not just osd.0 given in script comment ? Thanks a lot. Andrija On 8 August 2014 15:44, Dan Van Der Ster <daniel.vanderster at cern.ch> wrote: > Hi, > Here?s what we do to identify our top RBD users. > > First, enable log level 10 for the filestore so you can see all the IOs > coming from the VMs. Then use a script like this (used on a dumpling > cluster): > > > https://github.com/cernceph/ceph-scripts/blob/master/tools/rbd-io-stats.pl > > to summarize the osd logs and identify the top clients. > > Then its just a matter of scripting to figure out the ops/sec per > volume, but for us at least the main use-case has been to identify who is > responsible for a new peak in overall ops ? and daily-granular statistics > from the above script tends to suffice. > > BTW, do you throttle your clients? We found that its absolutely > necessary, since without a throttle just a few active VMs can eat up the > entire iops capacity of the cluster. > > Cheers, Dan > > -- Dan van der Ster || Data & Storage Services || CERN IT Department -- > > > On 08 Aug 2014, at 13:51, Andrija Panic <andrija.panic at gmail.com> wrote: > > Hi, > > we just had some new clients, and have suffered very big degradation in > CEPH performance for some reasons (we are using CloudStack). > > I'm wondering if there is way to monitor OP/s or similar usage by client > connected, so we can isolate the heavy client ? > > Also, what is the general best practice to monitor these kind of changes > in CEPH ? I'm talking about R/W or OP/s change or similar... > > Thanks, > -- > > Andrija Pani? > > _______________________________________________ > ceph-users mailing list > ceph-users at lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > -- Andrija Pani? -------------------------------------- http://admintweets.com -------------------------------------- -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140808/600279a0/attachment.htm>
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