Gluster users - Jun 2008 - TCP/IP Settings

Hi everyone, 
I am currently converting my AoE/GFS setup over to GlusterFS. So far I have been
very impressed with Gluster and am loving it's ease of use. I wrestled with
GFS for days, and still do too much IMO. ;)

I had a question about TCP/IP settings. I know Infiniband as interconnects would
give us the best performance, but we currently do not have the budget to upgrade
everything, so I am going to use a dedicated Gig switch along with a dedicated
nic on each machine to access the Gluster cluster. With AoE, we were using jumbo
frames on the switch and had each machine's MTU setting at 9000. I think by
default most network cards put the MTU at 1500 or so.

With GlusterFS is it more advantageous to use a higher MTU setting and/or jumbo
frames? For some background we are using Gluster in a webserver environment and
I would say the majority of use on the file system is reads and writes of
smaller files < 100K. I am not sure if this makes a difference as far as the
settings though.

Thanks, 
Mike 


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Hi Mike,
 Jumbo frames does help for GlusterFS too. Because it reduces the latency in
Gig/E connections by a margin.

It doesn't need any changes in GlusterFS setting.

Regards,
Amar

On Sun, Jun 1, 2008 at 12:38 AM, <mtaggart at envoydirect.com> wrote:
> Hi everyone,
> I am currently converting my AoE/GFS setup over to GlusterFS. So far I have
> been very impressed with Gluster and am loving it's ease of use. I
wrestled
> with GFS for days, and still do too much IMO. ;)
>
> I had a question about TCP/IP settings. I know Infiniband as interconnects
> would give us the best performance, but we currently do not have the budget
> to upgrade everything, so I am going to use a dedicated Gig switch along
> with a dedicated nic on each machine to access the Gluster cluster. With
> AoE, we were using jumbo frames on the switch and had each machine's
MTU
> setting at 9000. I think by default most network cards put the MTU at 1500
> or so.
>
> With GlusterFS is it more advantageous to use a higher MTU setting and/or
> jumbo frames? For some background we are using Gluster in a webserver
> environment and I would say the majority of use on the file system is reads
> and writes of smaller files < 100K. I am not sure if this makes a
difference
> as far as the settings though.
>
> Thanks,
> Mike
>
>
>
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://zresearch.com/cgi-bin/mailman/listinfo/gluster-users
>
>

-- 
Amar Tumballi
Gluster/GlusterFS Hacker
[bulde on #gluster/irc.gnu.org]
http://www.zresearch.com - Commoditizing Super Storage!
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