[Gluster-devel] posix-locks problem

[Amar S. Tumballi]

Are you sure you have 'features/posix-locks' translator loaded? because the
locking feature is provided by that translator. Without that, surely its not
going to work.

-amar

On 10/19/07, Vincent Régnard <vregnard at tbs-internet.com> wrote:
>
> Anand Avati a écrit :
> > Kevan,
> >  I just submitted a patch to fuse-devel which adds flock() support to
> fuse.
> > You could either wait for the next fuse release, or install glusterfs's
> > patched fuse (2.7.0-glfs3) which has that patch included.
> >
> > thanks,
> > avati
>
> I run a small application that uses flock on a clustereds FS (glusterfs
> 1.3.7 with fuse 2.7.0-glfs5), it clearly shows that flock locking is not
> working in that situation. Are you sure flock trouble has been solved ?
>
> >
> > 2007/8/7, Kevan Benson <kbenson at a-1networks.com>:
> >>
> >> Any consensus on whether flock support is planned for the future?  I
> seem
> >> to
> >> remember reading somewhere in the documentation that a native glusterfs
> >> client was being considered at some point in the future, which could
> make
> >> this feasible.
> >>
> >> On Monday 06 August 2007 09:27, Amar S. Tumballi wrote:
> >>> Thanks for pointing out the mistakes in wiki.. just corrected it.
> >>>
> >>> -amar
> >>>
> >>> On 8/6/07, Kevan Benson <kbenson at a-1networks.com> wrote:
> >>>> On Sunday 05 August 2007 23:28, Vikas Gorur wrote:
> >>>>> What you're trying to do is use flock(2) locks. flock(2) locks are
> >> not
> >>>>> supported by FUSE. The lock requests will be handled by the kernel
> >>>>> itself and never reach FUSE, let alone GlusterFS.
> >>>>>
> >>>>> The posix-locks translator implements the fcntl(2) locking API.
> >>>>> fcntl(2) allows for more fine-grained locking, as it supports
> >> locking
> >>>>> of particular regions inside a file --- whereas flock(2) locks are
> >> on
> >>>>> the entire file.
> >>>>>
> >>>>> flock(2) and fcntl(2) locks can co-exist on Linux. There is
> >> absolutely
> >>>>> no interaction between them.
> >>>>>
> >>>>> In summary, if you want distributed file locks, you should use the
> >>>>> fcntl(2) API, not flock(2).
> >>>> Thanks.  Does that mean the the part of the FAQ that mentions flock
> >> along
> >>>> with
> >>>> fcntl is incorrect, or just mentioning a feature not supported _yet_?
> >>>>
> >>>>
>
>
> --
> Vincent Régnard
> vregnard at tbs-internet.com
> TBS-internet.com
> 027 630 5902
>
>
>
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-- 
Amar Tumballi
Gluster/GlusterFS Hacker
[bulde on #gluster/irc.gnu.org]
http://www.zresearch.com - Commoditizing Supercomputing and Superstorage!