[Gluster-devel] Client side translators doubt

Jeff Darcy jdarcy at redhat.com
Tue Jan 15 20:29:27 UTC 2013

On 01/15/2013 01:43 PM, Gustavo Bervian Brand wrote:
>    I'm trying some volumes configurations with 2 nodes, each one having a
> gluster client and server running.
>    Both clients have each one a volume related to my translator, which has as
> sub volumes two "protocol/client" subvolumes (one subvol pointing to the local
> node's IP/vol and another pointing to the remote node IP/vol).
>    This works OK, and here comes the problem: when I try to change the local
> vol at the client side from a "protocol/client" type to a "posix" type the read
> breaks with -1 (operation not permitted).

You don't say what version you're using, but could it be one of these?

	(patch for previous at http://review.gluster.org/#change,4114)

In general, going directly to storage/posix seems ill warranted.  It bypasses a 
bunch of translators like marker and access-control, for example.  As we go 
forward there are likely to be even more "helper" translators for UID mapping, 
coordination for client-side encryption or erasure coding.  Since it's not 
possible to create such a configuration through the CLI or other supported 
tools, it's not going to work properly when configurations change, either.  Is 
it really worth all that, for what is likely to be a modest performance gain in 
most cases?

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