perfSONAR User Q&A and Other Discussion

["Hagen, Skye ()" <>]

Thanks Andrew!

The original tests were setup a while ago, and probably were running classic iperf. I did make network buffer changes, reloaded the systems, delete the original tests, and setup new tests. The inclusion of the Packet Retransmissions coincides with the changes I did.

Thanks, Skye.

From: Andrew Lake <>
Date: Thursday, July 9, 2015 at 12:57 PM
To: Skye Hagen <>
Cc: perfsonar-user <>
Subject: Re: [perfsonar-user] Question on throughput graphs

Hi,

It was added in the 3.4 release last fall. They only appear though if you are running BWCTL using iperf3 as opposed to "classic" iperf.  For tests via the web UI, iperf3 is the default as of 3.4. If you use the MeshConfig software, your central mesh has to explicitly choose iperf or iperf3.  I am not sure how you tests are configured, but I would suspect at some point your tests got changed to use iperf3 hence their sudden appearance.

Thanks,

Andy

On Thu, Jul 9, 2015 at 3:45 PM, Hagen, Skye () <> wrote:

I am in the process of setting up a couple of perfSONAR systems, and am trying to get them properly tuned. I have a throughput test configured and running. When I look at the graph, and hover over a data point, it will show Packet Retransmissions. When I look at data from several weeks ago, I don’t see any packet retransmissions. It only shows on data points collected in the last few weeks.

Has perfSONAR always shown Packet Retransmission when hovering, or is this a recent addition to the software? (We are on auto-update.)

Thanks, Skye.