Hello Florian, > On Tue, Jun 21, 2016 at 3:11 PM, Yoann Moulin <yoann.moulin@xxxxxxx> wrote: >> Hello, >> >> I found a performance drop between kernel 3.13.0-88 (default kernel on Ubuntu >> Trusty 14.04) and kernel 4.4.0.24.14 (default kernel on Ubuntu Xenial 16.04) >> >> ceph version is Jewel (10.2.2). >> All tests have been done under Ubuntu 14.04 > > Knowing that you also have an internalis cluster on almost identical > hardware, can you please let the list know whether you see the same > behavior (severely reduced throughput on a 4.4 kernel, vs. 3.13) on > that cluster as well? ceph version is infernalis (9.2.0) Ceph osd Benchmark: Kernel 3.13.0-88-generic : ceph tell osd.ID => average ~84MB/s Kernel 4.2.0-38-generic : ceph tell osd.ID => average ~90MB/s Kernel 4.4.0-24-generic : ceph tell osd.ID => average ~75MB/s The slow down is not as much as I have with Jewel but it is still present. Best Regards, -- Yoann Moulin EPFL IC-IT _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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