On Wed, Jul 18, 2018 at 12:58 PM Nikola Ciprich <nikola.cipr...@linuxbox.cz> wrote:
> > What's the output from "rbd info nvme/centos7"? > that was it! the parent had some of unsupported features > enabled, therefore the child could not be mapped.. > > so the error message is a bit confusing, but now after disabling > the features on the parent it works for me, thanks! > > > Odd. The exclusive-lock code is only executed once (in general) upon the > > first write IO (or immediately upon mapping the image if the "exclusive" > > option is passed to the kernel). Therefore, it should have zero impact on > > IO performance. > > hmm, then I might have found a bug.. > > [root@v4a bench1]# sh bench-rbd > Jobs: 8 (f=8): [r(8)][100.0%][r=671MiB/s,w=0KiB/s][r=172k,w=0 IOPS][eta > 00m:00s] > Jobs: 8 (f=8): [w(8)][100.0%][r=0KiB/s,w=230MiB/s][r=0,w=58.8k IOPS][eta > 00m:00s] > > [root@v4a bench1]# rbd feature enable nvme/xxx exclusive-lock > [root@v4a bench1]# sh bench-rbd > Jobs: 8 (f=8): [r(8)][100.0%][r=651MiB/s,w=0KiB/s][r=167k,w=0 IOPS][eta > 00m:00s] > Jobs: 8 (f=8): [w(8)][100.0%][r=0KiB/s,w=45.9MiB/s][r=0,w=11.7k IOPS][eta > 00m:00s] > > (as you can see, the performance impact is even worse..) > > I guess I should create a bug report for this one? > Care to share your "bench-rbd" script (on pastebin or similar)? > > nik > > > > > > > > > > > > > BR > > > > > > nik > > > > > > > > > -- > > > ------------------------------------- > > > Ing. Nikola CIPRICH > > > LinuxBox.cz, s.r.o. > > > 28. rijna 168, 709 00 Ostrava > > > > > > tel.: +420 591 166 214 > > > fax: +420 596 621 273 > > > mobil: +420 777 093 799 > > > > > > www.linuxbox.cz > > > > > > mobil servis: +420 737 238 656 > > > email servis: ser...@linuxbox.cz > > > ------------------------------------- > > > > > > > > > -- > > Jason > > -- > ------------------------------------- > Ing. Nikola CIPRICH > LinuxBox.cz, s.r.o. > 28. rijna 168, 709 00 Ostrava > > tel.: +420 591 166 214 > fax: +420 596 621 273 > mobil: +420 777 093 799 > > www.linuxbox.cz > > mobil servis: +420 737 238 656 > email servis: ser...@linuxbox.cz > ------------------------------------- > -- Jason
_______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
