[Gluster-devel] Client side translators doubt

[Stephan von Krawczynski]

On Wed, 16 Jan 2013 13:06:56 -0500
Jeff Darcy <jdarcy at redhat.com> wrote:

> On 01/16/2013 12:41 PM, Gustavo Bervian Brand wrote:
> >   Finally, let's get back to my original configuration with both
> > subvolumes as "protocol/client" types: it works ok until I try something
> > unusual, which is pointing at the server side of both nodes their
> > "posix" type subvolumes to the same shared path. This path is a mount
> > point shared by both nodes through a lustre FS. In this case, both posix
> > subvolumes, at the backend, are writing to the same place. Should I
> > expect this to work without problems or changes at the posix translator
> > would be necessary?
> 
> Bricks *must* use separate storage.  Even if there's a reason to create
> bricks on top of shared storage (and you've accurately guessed my
> reaction to that) they should be in separate subdirectories.  Otherwise
> they will definitely step on each other's "private" information in
> .glusterfs, and the level of change that would be necessary to make them
> work a different way is considerable.

rename ".glusterfs" in ".glusterfs-<brickname>" in source
better:
make ".glusterfs" a dir and store brick-private information in a file
<brickname> and global (shared) information in a file "global".
Can as well be used to mark bricks online/offline and several other missing
things.
-- 
Regards,
Stephan