Hi, If your clients can support the firefly tunable you can set firefly:
'ceph osd crush tunables firefly' Or you can hide the warning: mon warn on legacy crush tunables = false in [mon] section in ceph.conf. Thanks On Tue, Jul 12, 2016 at 5:59 PM, Mike Jacobacci <mi...@flowjo.com> wrote: > Thanks, Can I ignore this warning then? > > health HEALTH_WARN > crush map has legacy tunables (require bobtail, min is firefly) > > Cheers, > Mike > > On Jul 12, 2016, at 9:57 AM, Sean Redmond <sean.redmo...@gmail.com> wrote: > > Hi, > > Take a look at the docs here ( > http://docs.ceph.com/docs/jewel/rados/operations/crush-map/#tunables) for > details on what tunables work with which kernel version. and how you can > change them e.g: > > 'ceph osd crush tunables bobtail' > > You could use a main line kernel from here ( > http://elrepo.org/tiki/kernel-ml) as 4.6 is available for CentOS7 > > Thanks > > On Tue, Jul 12, 2016 at 5:45 PM, Mike Jacobacci <mi...@flowjo.com> wrote: > >> Hi Sean, >> >> Thanks for the quick response, this is what I see in dimes: >> >> set mismatch, my 102b84a842a42 < server's 40102b84a842a42, missing >> 400000000000000 >> >> How can I set the tunable low enough? And what does that mean for >> performance? >> >> Cheers, >> Mike >> >> On Jul 12, 2016, at 9:43 AM, Sean Redmond <sean.redmo...@gmail.com> >> wrote: >> >> Hi, >> >> It should work for you with kernel 3.10 as long as turntables are set low >> enough - Do you see anything in 'dmesg'? >> >> Thanks >> >> On Tue, Jul 12, 2016 at 5:37 PM, Mike Jacobacci <mi...@flowjo.com> wrote: >> >>> Hi All, >>> >>> Is mounting rbd only really supported in Ubuntu? All of our servers are >>> CentOS 7 or RedHat 7 and since they are at Kernel 3.10, I can’t get rbd >>> working. Even if I use legacy tunables or set tunables to 1/2/3… Nothing >>> will mount the block device. >>> >>> The only answer I can find to get this working under RHEL or CentOS is >>> to upgrade the kernel… Doesn’t that mean RBD isn’t support for a >>> production environment unless it’s Ubuntu or whatever OS supports a Kernel >>> over 3.18? >>> >>> Thanks for everyone’s help so far! >>> >>> Cheers, >>> Mike >>> _______________________________________________ >>> ceph-users mailing list >>> ceph-users@lists.ceph.com >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >>> >> >> >> > >
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