On Mon, Feb 4, 2019 at 9:25 AM Massimo Sgaravatto <massimo.sgarava...@gmail.com> wrote: > > The official documentation [*] says that the only requirement to use the > balancer in upmap mode is that all clients must run at least luminous. > But I read somewhere (also in this mailing list) that there are also > requirements wrt the kernel. > If so: > > 1) Could you please specify what is the minimum required kernel ?
4.13 or CentOS 7.5. See  for details. > 2) Does this kernel requirement apply only to the OSD nodes ? Or also to the > clients ? No, only to the kernel client nodes. If the kernel client isn't used, there is no requirement at all.  http://lists.ceph.com/pipermail/ceph-users-ceph.com/2018-May/027002.html Thanks, Ilya _______________________________________________ ceph-users mailing list firstname.lastname@example.org http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com