[Gluster-users] performance stops at 1Gb

Craig Carl craig at gluster.com
Fri Dec 3 06:00:33 UTC 2010

Peter -
    Using Gluster the performance of any single file is going to be 
limited to the performance of the server on which it exists, or in the 
case of a striped volume of the server on which the segment of the file 
you are accessing exists. If you were able to start 4 processes, 
accessing different parts of the striped file, or lots of different 
files in a distribute cluster you would see your performance increase 



Craig Carl
Senior Systems Engineer

On 11/26/2010 07:57 AM, Gotwalt, P. wrote:
> Hi All,
> I am doing some tests with gluster (3.1) and have a problem of not
> getting higher throughput than 1 Gb (yes bit!) with 4 storage bricks.
> My setup:
> 4 storage bricks (dualcore, 4GB mem) each with 3 sata 1Tb disks,
> connected to a switch with 1 Gb nics.  In my tests I only use 1 SATA
> disk as a volume, per brick.
> 1 client (2xquad core, 16 GB mem) with a 10Gb nic to the same switch as
> the bricks.
> When using striped of distributed configurations, with all 4 bricks
> configured to act as a server, the performance will never be higher than
> just below 1 Gb! I tested with 4, 8 and 16 parallel bonnie++ runs.
> The idea is that parallel bonnie's create enough files to get
> distributed over the storage bricks. And all this bonnie's wil deliver
> enough throughput to fill up this 10Gb line. I expect the throughput to
> be maximum 4Gb because that's the maximum the 4 storage bricks together
> can produce.
> I also tested the throughput of the network with iperf3 and got:
> - 5Gb to a second temporary client on another switch 200 Km from my
> site, connected with a 5Gb fiber
> - 908-920 Mb to the interfaces of the bricks.
> So the network seems ok.
> Can someone advise me on why I don't get 4Gb? Or can someone advise me
> on a better setup with the equipment I have?
> Peter Gotwalt
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