Re: [Gluster-devel] gluster volume file

[Muralidhar Balcha]

Thanks Jeff for the information. I will see if the volume filter will help us get over the hump.

I will also add my comments to the feature proposal as I gain more understanding on what is needed to support third party translators.  I think it is very important for Gluster adoption. The reason I am inclined to using the gluster is its translator framework and which perhaps is the key differentiator in scaleout file systems.

Thanks again for quick reply.

Murali Balcha

On Thu, Sep 26, 2013 at 10:47 AM, Jeff Darcy <address@hidden> wrote:

On 09/26/2013 10:33 AM, Muralidhar Balcha wrote:

I am experimenting with some custom translators. To test them I manually
edit the volume file to load my  translators. It looks like gluster is
aggressively maintaining the consistency of the original volume file and
overwrites my changes every time I restart the volume. How do I configure
gluster not to over write my changes?

Yes, GlusterFS does aggressively try to maintain consistency of volfiles with
the current configuration.  Having probably written more third-party or
experimental translators than anyone I agree that this is incredibly
inconvenient, but it probably still avoids more problems than it creates.
There *is* a hook to add custom translators, so that they'll get re-added any
time the volfile is regenerated.  Details here:

http://www.gluster.org/community/documentation/index.php/Glusterfs-filter

If you want to write such a filter in Python, there's a library called
volfilter.py that can parse/manipulate volfiles.  I've used it for several
different projects, and a version is included in the GlusterFS source tree.

With respect to more general support for custom translators via the CLI and so
on, I suggest following this feature proposal:

http://www.gluster.org/community/documentation/index.php/Features/Easy_addition_of_custom_translators

Even better, chip in with some suggestions of what you think the interface
should look like, since that's not entirely clear yet.  Thanks!

--
Muralidhar Balcha
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