> 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? 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: servis@xxxxxxxxxxx > > ------------------------------------- > > > > > -- > 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: servis@xxxxxxxxxxx -------------------------------------
Attachment:
pgpueHh_n5L_s.pgp
Description: PGP signature
_______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
