Slight clarification: to disable these features on existing images, you
should run the following:

rbd feature disable <image-spec> deep-flatten,fast-diff,object-map,
exclusive-lock

(note the commas instead of the spaces when disabling multiple features at
once).

--

Jason

On Thu, Apr 21, 2016 at 4:48 AM, Ilya Dryomov <idryo...@gmail.com> wrote:

> On Thu, Apr 21, 2016 at 11:41 AM, Mika c <mika.leaf...@gmail.com> wrote:
> > Hi xizhiyong,
> >     Thanks for your infomation. I am using Jewel right now(10.1.2), the
> > setting "rbd_default_features = 3" not working for me.
> > And this setting will enable "exclusive-lock, object-map, fast-diff,
> > deep-flatten" features.
>
> Setting "rbd default features = 3" will ensure that new images are
> created with only layering and stripingv2 features enabled.  To disable
> exclusive-lock, object-map, etc on the already created image, you have
> to use "rbd feature disable".
>
> Where are you setting it?  It has to be set in the client-side
> ceph.conf, as it's the client who decides which feature bits to enable
> on creation.  Setting it on the OSDs will have no effect.
>
> Thanks,
>
>                 Ilya
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>
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