[Gluster-users] Antw: Re: MS Office/Samba/Glusterfs/Centos

[Adrian Valeanu]

Hi,
over the weekend I installed ctdb from here https://ftp.samba.org/pub/ctdb/packages/redhat/RHEL6/2.5.1/ .
Now the situation is even worse than before. The tdb databases of Samba are clustered now, but of course all of them are clustered.
I can join the first server in to the AD domain without problems. When I join the second one (the tdb are clustered) it messes the join of the first.
This might be desirable in an HA situation where an ip takeover happens but for me it is contra productive. This is mentioned somewhere in the samba 
documentation. It would be nice to only have the tdb clustered where the locks happen but maybe this use case is too strange.
And of course this is no Glusterfs problem anymore.
 


>>> Paul Robert Marino <prmarino1 at gmail.com> 23.01.2014 23:12 >>>
Ira

In clustered mode stores locking information in a TDB so thats why you
need to configure CTDB and tell samba its clustered in the configed so
it will keep the sync databases in sync.

By the way samba does still do spinlocks or at least it did last year
here an intresting thread where they were talking about spinlocks,
fcntl locks and TDB based locks
https://groups.google.com/forum/#!topic/mailing.unix.samba-technical/hM-t2pBf_Hs

That said spinlocks are just the first thing that came to mind
(because that was part of many discussions back in the 2.x days) and
was not best choice of words on my part.




On Thu, Jan 23, 2014 at 4:48 PM, Paul Robert Marino <prmarino1 at gmail.com> wrote:
> check this article its fairly strait forward http://ctdb.samba.org/samba.html
> if you don't get this configured properly then your locking wouldn't work.
>
> by the way oplocks need to be enabled based on an other post it looks
> like you turned off all locking support.
>
>
> On Thu, Jan 23, 2014 at 3:05 PM, Paul Robert Marino <prmarino1 at gmail.com> wrote:
>> Are you using CTDB on a shared gluster volume instead of TDB on a local
>> volume which is samba default.
>>
>> If not this may explain your issue because Samba stores  or at least did ate
>> one time store spinlocks in the TDB for speed.
>>
>>
>>
>> -- Sent from my HP Pre3
>>
>> ________________________________
>> On Jan 23, 2014 10:31, Adrian Valeanu <Adrian.Valeanu at idiada.com> wrote:
>>
>> Hi,
>> I try to replicate some data that resides on two CentOS servers. The
>> replicated data should be shared using Samba to the users. It should be
>> avoided that two users
>> try to work on the same file using MS Office. If the users access the same
>> file on one server, one of them is not able to modify the file. This is
>> possible (and the normal operation)
>> if one uses one server with Samba. I assumed that this kind of lock would be
>> replicated too.
>>
>> I did not knew about  libgfapi and have not used it yesterday. I used the
>> fuse mounted directory as data source for Samba.
>>
>> Yesterday night I updated both CentOS servers. They are CentOS 6.5 now. Now
>> locking does not happen at all any more. After you mentioned libgfapi I
>> found this:
>> https://www.mail-archive.com/gluster-users@gluster.org/msg13033.html
>>
>> I managed to compile the module and switched to samba-glusterfs-vfs. But I
>> still have no locking
>> My Samba configuration looks like this:
>> [glusterdata-vfs]
>>    vfs object = glusterfs
>>    glusterfs:volume = gv0
>>    path = /
>>    glusterfs:loglevel = 2
>>    glusterfs:logfile = /var/log/samba/glusterdata-vfs.log
>>
>>    read only = no
>>    browseable = yes
>>    guest ok = no
>>    printable = no
>>    nt acl support = yes
>>    acl map full control = yes
>>
>> Thank you for your attention.
>>
>>
>>>>> Lalatendu Mohanty <lmohanty at redhat.com> 22.01.2014 16:10 >>>
>>>
>> On 01/22/2014 08:30 PM, Adrian Valeanu wrote:
>>
>> Hi,
>> I have set up glusterfs 3.4.2 over an 10Gig xfs filesystem on two CentOS 6
>> servers. The gluster filesystem is shared through Samba on both servers.
>> Replication is working like a charm but file locking is not. Is it possible
>> to have file locking working in this configuration in an way that Microsoft
>> Office 2010
>> behaves like as if the files were on the same server? Does somebody have
>> such an configuration?
>> I tried a lot of the Samba configurations found on the mailing list but none
>> showed the expected results.
>>
>>
>> Are you using Samba with libgfapi? I am not sure if I understand your
>> expectation on locking through Samba. Some more context would be nice.
>>
>> -Lala
>>
>> Thank you
>>
>>
>> _______________________________________________
>> Gluster-users mailing list
>> Gluster-users at gluster.org
>> http://supercolony.gluster.org/mailman/listinfo/gluster-users
>>
>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://supercolony.gluster.org/pipermail/gluster-users/attachments/20140127/e0abaabd/attachment.html>