[ceph-users] CTDB Cluster Samba on Cephfs

[Kai Blin]

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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.

Cheers,
Kai

- -- 
Kai Blin
Worldforge developer http://www.worldforge.org/
Wine developer http://wiki.winehq.org/KaiBlin
Samba team member http://www.samba.org/samba/team/
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