[Gluster-users] Performance

Burnash, James jburnash at knight.com
Wed Apr 20 19:01:48 UTC 2011

Gluster doesn't "spread the load across 6 servers", because the file is only being retrieved from one server (as Joe has stated). So you are limited to the throughput of that server. Even with the files replicated, only one copy is ever read at a time from a single client.

Hopefully that makes it clearer.

Nice work Joe - very helpful to the rest of us, I think.

James Burnash, Unix Engineering

-----Original Message-----
From: gluster-users-bounces at gluster.org [mailto:gluster-users-bounces at gluster.org] On Behalf Of Mohit Anchlia
Sent: Wednesday, April 20, 2011 2:59 PM
To: landman at scalableinformatics.com; gluster-users at gluster.org
Subject: Re: [Gluster-users] Performance

Correct. I was referring to gluster performance test that I am running
using gluster client that spreads the load accross all the servers.
>From that test I get only 20MB/s not 60MB/s.

Also, at this point what would be your recommendation?

On Wed, Apr 20, 2011 at 11:56 AM, Joe Landman
<landman at scalableinformatics.com> wrote:
> On 04/20/2011 02:54 PM, Mohit Anchlia wrote:
>> Thanks again! But what I don't understand is that I have 3 X 2 servers
>> so I would expect 20 X 3 = 60 MBPS total atleast. My load is getting
>> spread accross 3 X 2 servers in distributed replica. If I was using
>> just one gluster server I would understand but with 6 it makes no
>> sense..
> The dd is going to only one server, unless you are doing 6 simultaneous
> dd-s.
> --
> Joseph Landman, Ph.D
> Founder and CEO
> Scalable Informatics Inc.
> email: landman at scalableinformatics.com
> web  : http://scalableinformatics.com
>       http://scalableinformatics.com/sicluster
> phone: +1 734 786 8423 x121
> fax  : +1 866 888 3112
> cell : +1 734 612 4615
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