Hm, true... One final question, I might be a noob... 13923 B/s rd, 4744 kB/s wr, 1172 op/s what does this op/s represent - is it classic IOps (4k reads/writes) or something else ? how much is too much :) - I'm familiar with SATA/SSD IO/s specs/tests, etc, but not sure what CEPH menas by op/s - could not find anything with google... Thanks again Wido. Andrija On 8 August 2014 14:07, Wido den Hollander <wido at 42on.com> wrote: > On 08/08/2014 02:02 PM, Andrija Panic wrote: > >> Thanks Wido, yes I'm aware of CloudStack in that sense, but would prefer >> some precise OP/s per ceph Image at least... >> Will check CloudStack then... >> >> > Ceph doesn't really know that since RBD is just a layer on top of RADOS. > In the end the CloudStack hypervisors are doing I/O towards RADOS objects, > so giving exact stats of how many IOps you are seeing per image is hard to > figure out. > > The hypervisor knows this best since it sees all the I/O going through. > > Wido > > Thx >> >> >> On 8 August 2014 13:53, Wido den Hollander <wido at 42on.com >> <mailto:wido at 42on.com>> wrote: >> >> On 08/08/2014 01:51 PM, Andrija Panic 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 ? >> >> >> This is not very easy to do with Ceph, but CloudStack keeps track of >> this in the usage database. >> >> With never versions of CloudStack you can also limit the IOps of >> Instances to prevent such situations. >> >> 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 <mailto:ceph-users at lists.ceph.com> >> http://lists.ceph.com/__listinfo.cgi/ceph-users-ceph.__com >> >> <http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com> >> >> >> >> -- >> Wido den Hollander >> 42on B.V. >> Ceph trainer and consultant >> >> Phone: +31 (0)20 700 9902 <tel:%2B31%20%280%2920%20700%209902> >> Skype: contact42on >> _________________________________________________ >> ceph-users mailing list >> ceph-users at lists.ceph.com <mailto:ceph-users at lists.ceph.com> >> http://lists.ceph.com/__listinfo.cgi/ceph-users-ceph.__com >> >> <http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com> >> >> >> >> >> -- >> >> Andrija Pani? >> -------------------------------------- >> http://admintweets.com >> -------------------------------------- >> > > > -- > Wido den Hollander > 42on B.V. > Ceph trainer and consultant > > Phone: +31 (0)20 700 9902 > Skype: contact42on > -- Andrija Pani? -------------------------------------- http://admintweets.com -------------------------------------- -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140808/a9cdadc8/attachment.htm>
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