[Gluster-users] performance due to network?

[Aronesty, Erik]

I have not tried to use NFS.

From: Santosh Pradhan [mailto:spradhan at redhat.com]
Sent: Friday, June 13, 2014 9:22 AM
To: Aronesty, Erik; Pranith Kumar Karampuri; gluster-users at gluster.org
Subject: Re: [Gluster-users] performance due to network?

Hi Erik,
Could you just turn the DRC off and retry your test case?

1. Turn the DRC off:
gluster volume set <volume name> nfs.drc off

2. Restart all the gluster processes
a. killall glusterd glusterfs glusterfsd
b. glusterd

2.b should bring back all the gluster proc's.

3. Retry your large copy test.

Thanks,
Santosh

On 06/13/2014 05:16 PM, Aronesty, Erik wrote:
glusterfs 3.5.0 built on Apr 24 2014 01:38:34

From: Pranith Kumar Karampuri [mailto:pkarampu at redhat.com]
Sent: Friday, June 13, 2014 1:21 AM
To: Aronesty, Erik; gluster-users at gluster.org<mailto:gluster-users at gluster.org>
Subject: Re: [Gluster-users] performance due to network?

Erik,
What version of glusterfs are you using?

Pranith
On 06/13/2014 02:09 AM, Aronesty, Erik wrote:
I suspect I'm having performance issues because of network speeds.

Supposedly I have 10gbit connections on all my NAS devices, however, it seems to me that the fastest I can write is 1Gbit.   When I'm copying very large files, etc, I see 'D' as the cp waits to I/O, but when I go the gluster servers, I don't see glusterfsd waiting (D) to write to the bricks themselves.  I have 4 nodes, each with  10Gbit connection, each has 2 Areca RAID controllers with 12 disk raid5, and the 2 controllers stripped into 1 large volume.   Pretty sure there's plenty of i/o left on the bricks themselves.

Is it possible that "one big file" isn't the right test... should I try 20 big files, and see how saturated my network can get?

Erik Aronesty
Senior Bioinformatics Architect
EA | Quintiles
Genomic Services
4820 Emperor Boulevard
Durham, NC 27703 USA

Office: + 919.287.4011
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