If one VM is using multiple rbd’s then using just $pid is not enough. Socket shows only one (first) rbd statistics.
Regards Mateusz From: Jason Dillaman [mailto:jdill...@redhat.com] Sent: Tuesday, July 24, 2018 2:39 PM To: Mateusz Skala (UST, POL) <mateusz.sk...@ust-global.com> Cc: ceph-users <ceph-users@lists.ceph.com> Subject: Re: [ceph-users] Read/write statistics per RBD image On Tue, Jul 24, 2018 at 6:51 AM Mateusz Skala (UST, POL) <mateusz.sk...@ust-global.com<mailto:mateusz.sk...@ust-global.com>> wrote: Hello again, How can I determine $cctid for specific rbd name? Or is there any good way to map admin-socket with rbd? The $cctid is effectively pseudo-random (it's a memory location within the process). Your best best is just a $pid mapping. Regards Mateusz From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com<mailto:ceph-users-boun...@lists.ceph.com>] On Behalf Of Mateusz Skala (UST, POL) Sent: Tuesday, July 24, 2018 9:49 AM To: dilla...@redhat.com<mailto:dilla...@redhat.com> Cc: ceph-users@lists.ceph.com<mailto:ceph-users@lists.ceph.com> Subject: [Possibly Forged Email] Re: [ceph-users] Read/write statistics per RBD image Thank You for help, it is exactly that I need. Regards Mateusz From: Jason Dillaman [mailto:jdill...@redhat.com] Sent: Wednesday, July 18, 2018 1:28 PM To: Mateusz Skala (UST, POL) <mateusz.sk...@ust-global.com<mailto:mateusz.sk...@ust-global.com>> Cc: dillaman <dilla...@redhat.com<mailto:dilla...@redhat.com>>; ceph-users <ceph-users@lists.ceph.com<mailto:ceph-users@lists.ceph.com>> Subject: Re: [ceph-users] Read/write statistics per RBD image Yup, on the host running librbd, you just need to enable the "admin socket" in your ceph.conf and then use "ceph --admin-daemon /path/to/image/admin/socket.asok perf dump" (i.e. not "ceph perf dump"). See the example in this tip window [1] for how to configure for a "libvirt" CephX user. [1] http://docs.ceph.com/docs/mimic/rbd/libvirt/#configuring-ceph On Wed, Jul 18, 2018 at 4:02 AM Mateusz Skala (UST, POL) <mateusz.sk...@ust-global.com<mailto:mateusz.sk...@ust-global.com>> wrote: Thanks for response. In ‘ceph perf dump’ there is no statistics for read/write operations on specific RBD image, only for osd and total client operations. I need to get statistics on one specific RBD image, to get top used images. It is possible? Regards Mateusz From: Jason Dillaman [mailto:jdill...@redhat.com<mailto:jdill...@redhat.com>] Sent: Tuesday, July 17, 2018 3:29 PM To: Mateusz Skala (UST, POL) <mateusz.sk...@ust-global.com<mailto:mateusz.sk...@ust-global.com>> Cc: ceph-users <ceph-users@lists.ceph.com<mailto:ceph-users@lists.ceph.com>> Subject: Re: [ceph-users] Read/write statistics per RBD image Yes, you just need to enable the "admin socket" in your ceph.conf and then use "ceph --admin-daemon /path/to/image/admin/socket.asok perf dump". On Tue, Jul 17, 2018 at 8:53 AM Mateusz Skala (UST, POL) <mateusz.sk...@ust-global.com<mailto:mateusz.sk...@ust-global.com>> wrote: Hi, It is possible to get statistics of issued reads/writes to specific RBD image? Best will be statistics like in /proc/diskstats in linux. Regards Mateusz _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com<mailto:ceph-users@lists.ceph.com> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com -- Jason -- Jason -- Jason
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