[ceph-users] CTDB Cluster Samba on Cephfs

Sam Lang slang at inktank.com
Wed Apr 3 14:53:58 MDT 2013

On Thu, Mar 28, 2013 at 6:32 AM, Kai Blin <kai at samba.org> wrote:
> Hash: SHA1
> On 2013-03-28 09:16, Volker Lendecke wrote:
>> On Wed, Mar 27, 2013 at 10:43:36PM -0700, Matthieu Patou wrote:
>>> On 03/27/2013 10:41 AM, Marco Aroldi wrote:
>>>> Hi list, I'm trying to create a active/active Samba cluster on
>>>> top of Cephfs I would ask if Ceph fully supports CTDB at this
>>>> time.
>>> If I'm not wrong Ceph (even CephFS) do not support exporting a
>>> block device or mounting the same FS more than once whereas CTDB
>>> explicitly require that you have a distributed filesystem where
>>> the same filesystem is mounted across all the nodes.
>> Is that true? I thought Ceph was one of the cluster filesystems
>> doing just that. What is Ceph if not a cluster file system?
> There's some problem with mounting the in-kernel cephfs driver on
> systems running the osd, iirc. I had to use the fuse-based driver to
> mount, which obviously is not too great, speed-wise.
> See http://ceph.com/docs/master/faq/#try-ceph for a better description
> of the issue.

Just to let folks know, we have a ceph vfs driver for samba that we
are testing out now.  We're planning to resolve a few of the bugs that
we're seeing presently with smbtorture, and send a pull request to the
samba repo.  If anyone wants to help with testing, let us know.  The
changes currently reside in the ceph branch of

-slang [inktank dev | http://www.inktank.com | http://www.ceph.com]

> Cheers,
> Kai
> - --
> Kai Blin
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