Only drive for it was to be able to use this: http://docs.ceph.com/docs/master/rados/operations/upmap/
To see if would help with the current very uneven PG MAP across 100+ OSD's, something that can wait if current kernel isn't ready. ,Ashley -----Original Message----- From: Ilya Dryomov [mailto:idryo...@gmail.com] Sent: 06 September 2017 17:09 To: Henrik Korkuc <li...@kirneh.eu> Cc: Ashley Merrick <ash...@amerrick.co.uk>; ceph-us...@ceph.com Subject: Re: [ceph-users] Luminous Upgrade KRBD On Wed, Sep 6, 2017 at 9:16 AM, Henrik Korkuc <li...@kirneh.eu> wrote: > On 17-09-06 09:10, Ashley Merrick wrote: > > I was just going by : > docs.ceph.com/docs/master/start/os-recommendations/ > > > Which states 4.9 > > > docs.ceph.com/docs/master/rados/operations/crush-map > > > Only goes as far as Jewel and states 4.5 > > > Not sure where else I can find a concrete answer to if 4.10 is new enough. > > Well, it looks like docs may need to be revisited as I was unable to > use kcephfs on 4.9 with luminous before downgrading tunables, not sure > about 4.10. > > > > ,Ashley > > ________________________________ > From: Henrik Korkuc <li...@kirneh.eu> > Sent: 06 September 2017 06:58:52 > To: Ashley Merrick; ceph-us...@ceph.com > Subject: Re: [ceph-users] Luminous Upgrade KRBD > > On 17-09-06 07:33, Ashley Merrick wrote: > > Hello, > > Have recently upgraded a cluster to Luminous (Running Proxmox), at the > same time I have upgraded the Compute Cluster to 5.x meaning we now > run the latest kernel version (Linux 4.10.15-1) Looking to do the following : > > ceph osd set-require-min-compat-client luminous This would effectively require 4.13 kernel for krbd and kcephfs. You won't gain much by requiring luminous clients, so unless you have a well-formulated reason to do it, I'd advise against it. That's also the reason os-recommendations page still lists 4.9 -- it is the latest jewel-compatible LTS kernel. Thanks, Ilya _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
