Try to update to kernel-3.10.0-862.11.6.el7.x86_64.rpm that should solve the problem.
Best Dietmar Am 28. August 2018 11:50:31 MESZ schrieb Marc Roos <m.r...@f1-outsourcing.eu>: > >I have a idle test cluster (centos7.5, Linux c04 >3.10.0-862.9.1.el7.x86_64), and a client kernel mount cephfs. > >I tested reading a few files on this cephfs mount and get very low >results compared to the rados bench. What could be the issue here? > >[@client folder]# dd if=5GB.img of=/dev/null status=progress >954585600 bytes (955 MB) copied, 157.455633 s, 6.1 MB/s > > > >I included this is rados bench that shows sort of that cluster >performance is sort of as expected. >[@c01 ~]# rados bench -p fs_data 10 write >hints = 1 >Maintaining 16 concurrent writes of 4194304 bytes to objects of size >4194304 for up to 10 seconds or 0 objects >Object prefix: benchmark_data_c01_453883 > sec Cur ops started finished avg MB/s cur MB/s last lat(s) avg >lat(s) > 0 0 0 0 0 0 - > 0 > 1 16 58 42 167.967 168 0.252071 >0.323443 > 2 16 106 90 179.967 192 0.583383 >0.324867 > 3 16 139 123 163.973 132 0.170865 >0.325976 > 4 16 183 167 166.975 176 0.413676 >0.361364 > 5 16 224 208 166.374 164 0.394369 >0.365956 > 6 16 254 238 158.642 120 0.698396 >0.382729 > 7 16 278 262 149.692 96 0.120742 >0.397625 > 8 16 317 301 150.478 156 0.786822 >0.411193 > 9 16 360 344 152.867 172 0.601956 >0.411577 > 10 16 403 387 154.778 172 0.20342 >0.404114 >Total time run: 10.353683 >Total writes made: 404 >Write size: 4194304 >Object size: 4194304 >Bandwidth (MB/sec): 156.08 >Stddev Bandwidth: 29.5778 >Max bandwidth (MB/sec): 192 >Min bandwidth (MB/sec): 96 >Average IOPS: 39 >Stddev IOPS: 7 >Max IOPS: 48 >Min IOPS: 24 >Average Latency(s): 0.409676 >Stddev Latency(s): 0.243565 >Max latency(s): 1.25028 >Min latency(s): 0.0830112 >Cleaning up (deleting benchmark objects) >Removed 404 objects >Clean up completed and total clean up time :0.867185 > > > > >_______________________________________________ >ceph-users mailing list >ceph-users@lists.ceph.com >http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com -- _______________________________________________ D i e t m a r R i e d e r, Mag.Dr. Innsbruck Medical University Biocenter - Division for Bioinformatics Innrain 80, 6020 Innsbruck Phone: +43 512 9003 71402 Fax: +43 512 9003 73100 Email: dietmar.rie...@i-med.ac.at Web: http://www.icbi.at
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