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:[email protected]] Sent: Tuesday, July 24, 2018 2:39 PM To: Mateusz Skala (UST, POL) <[email protected]> Cc: ceph-users <[email protected]> Subject: Re: [ceph-users] Read/write statistics per RBD image On Tue, Jul 24, 2018 at 6:51 AM Mateusz Skala (UST, POL) <[email protected]<mailto:[email protected]>> 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:[email protected]<mailto:[email protected]>] On Behalf Of Mateusz Skala (UST, POL) Sent: Tuesday, July 24, 2018 9:49 AM To: [email protected]<mailto:[email protected]> Cc: [email protected]<mailto:[email protected]> 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:[email protected]] Sent: Wednesday, July 18, 2018 1:28 PM To: Mateusz Skala (UST, POL) <[email protected]<mailto:[email protected]>> Cc: dillaman <[email protected]<mailto:[email protected]>>; ceph-users <[email protected]<mailto:[email protected]>> 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) <[email protected]<mailto:[email protected]>> 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:[email protected]<mailto:[email protected]>] Sent: Tuesday, July 17, 2018 3:29 PM To: Mateusz Skala (UST, POL) <[email protected]<mailto:[email protected]>> Cc: ceph-users <[email protected]<mailto:[email protected]>> 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) <[email protected]<mailto:[email protected]>> 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 [email protected]<mailto:[email protected]> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com -- Jason -- Jason -- Jason
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