The stock kernel from Debian is perfect Spectre / meltdown mitigations are worthless for a Ceph point of view, and should be disabled (again, strictly from a Ceph point of view)
If you need the luminous features, using the userspace implementations is required (librbd via rbd-nbd or qemu, libcephfs via fuse etc) On 03/23/2018 11:21 AM, Nicolas Huillard wrote: > Hi all, > > I'm using Luminous 12.2.4 on all servers, with Debian stock kernel. > > I use the kernel cephfs/rbd on the client side, and have a choice of : > * stock Debian 9 kernel 4.9 : LTS, Spectre/Meltdown mitigations in > place, field-tested, probably old libceph inside. > * backports kernel 4.14 : probably better Luminous support, no > Spectre/Meltdown mitigations yet, much less tested (I may have > experienced a kernel-related PPPoE problem lately), not long-term. > > Which client kernel would you suggest re. Ceph ? > Does the cephfs/rbd clients benefit from a really newer kernel ? > I expect that the Cpeh server-side kernel don't really matter. > > TIA, > _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
