[Gluster-devel] exporting a filesystem using tcp and ib-sdp

[John Marshall]

Hi,

I've been thinking about the method outlined below. From what I
can tell, it requires listening on separate ports, which seems to
introduce a complexity I would prefer, as an admin, to be dealt with
by glusterfs rather than by host configuration (i.e., each client/host
would have to "know" which port to call). I intend that the client
spec file is _always_ pulled from the server--it is never a local copy,
and that the "best" transport is used by the client.

Ideally, it would be great to have a single port to call, and let
glusterfs negotiate the transport, in order of preference. This
would permit:
1) a trivial mount operation from any machine, regardless of
locally supported transport,
2) a possible fallback mechanism should the chosen transport
fail.

Although not perfect, _something_ along these lines is possible
with the rapidscale product.

Comments?

John

Amar S. Tumballi wrote:
> Hi John, yes, it can be done.
>
> your definition of server spec file should be something like..
>
>
> ---------
> volume posix
> ..
> end-volume
>
> volume posix-locks
> ...
> end-volume
>
> volume server-ib
>   type protocol/server
>   option transport-type ib-sdp/server
>   option listen-port 7011
>   option auth.ip.posix-locks.allow *
>   subvolumes posix-locks
> end-volume
>
> volume server-tcp
>  type protocol/server
>  option transport-type tcp/server
>  option listen-port 7021 # notice the different port number
>  option auth.ip.posix-locks.allow *
>  subvolumes posix-locks
> end-volume
> -----------
>
> With the above spec file on server side, you need to have client spec 
> file, something like
>
> ----
> volume client
>   type protocol/client
>   option remote-host whichever.server.exports
>   option remote-port 7011
>   option transport-type ib-sdp/client
>   option remote-subvolume posix-locks
> end-volume
> -------
> or
> ----
> volume client
>   type protocol/client
>   option remote-host whichever.server.exports
>   option remote-port 7021
>   option transport-type tcp/client
>   option remote-subvolume posix-locks
> end-volume
> -------
>
> (Make sure you use 1.3.10 version for this). [1] 
>
> Regards,
> Amar
>
> [1] - A mail will be sent about the release notes and further updates 
> of 1.4.x developments by AB soon to the list.
>
>
>
> 2008/7/16 John Marshall <John.Marshall at ec.gc.ca 
> <mailto:John.Marshall at ec.gc.ca>>:
>
>     Hi,
>
>     I have a machine with an interface on an IB network and
>     another on a GigE network. Does glusterfs handle exporting
>     the same filesystem over two different transports (tcp and
>     ib-sdp) at the same time?
>
>     Thanks,
>     John
>
>
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>
>
>
>
> -- 
> Amar Tumballi
> Gluster/GlusterFS Hacker
> [bulde on #gluster/irc.gnu.org <http://irc.gnu.org>]
> http://www.zresearch.com - Commoditizing Super Storage!