Hi, It still isn't clear if you're using the fuse or kernel client. Do you `mount -t ceph` or something else? -- Dan On Wed, May 16, 2018 at 8:28 PM Donald "Mac" McCarthy <mac@xxxxxxxxxxxxxxx> wrote: > CephFS. 8 core atom C2758, 16 GB ram, 256GB ssd, 2.5 GB NIC (supermicro microblade node). > Read test: > dd if=/ceph/1GB.test of=/dev/null bs=1M > Write > dd if=/dev/zero of=/ceph/out.test bs=1M count=1024 > The tests are identical on both kernels - the results... well that is a different story. > CEPH servers are on release 12.2.4 > Client updated to 12.2.5 - in both kernels, ceph client is 12.2.5 > Please excuse any typos. Autocorrect is evil! > > On May 16, 2018, at 14:18, Jason Dillaman <jdillama@xxxxxxxxxx> wrote: > > > > What is your client (librbd, krbd, CephFS, ceph-client, ...) and how > > are you testing performance? > > > > On Wed, May 16, 2018 at 11:14 AM, Donald "Mac" McCarthy > > <mac@xxxxxxxxxxxxxxx> wrote: > >> Recently upgraded a CEPH client to CentOS 7.5. Upon doing so read and write performance became intolerably slow. ~2.5 MB/s. When booted back to a CentOS 7.4 kernel, performance went back to a normal 200 MB/s read and write. I have not seen any mention of this issue in all of the normal places including here. For now the solution is clear - don’t use the 7.5 update. Has anyone else experienced this issue? > >> > >> Please excuse any typos. Autocorrect is evil! > >> _______________________________________________ > >> ceph-users mailing list > >> ceph-users@xxxxxxxxxxxxxx > >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > > > > > -- > > Jason > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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