perfSONAR User Q&A and Other Discussion

[Szymon Trocha <>]

Hi Tom,

W dniu 18.09.2018 o 21:08, Tom Yard pisze:

Dear Szimon, the "pscheduler troubleshoot hostname" give a normal function on both servers.

I have start manually the iperf3 service in the target server:

# iperf3 -s

 

But in the web interface from server that runs tests to the other, latency and loss tests are OK but throughput test has not any data and I can see this error:

-> [throughput] TCP iperf3 returned an error: error - unable to connect to server: Connection refused [iperf3]

-> [throughput] UDP iperf3 returned an error: error - unable to connect to server: Connection refused [iperf3]

From the perfSONAR server that run a task I can see the following log:

Sep 18 12:03:07 PSR01 runner INFO     67206: With iperf3: throughput --duration PT20S --source 172.31.18.26 --ip-version 4 --dest 172.31.18.22 --source-node 172.31.18.26 --dest-node 172.31.18.22 --single-ended

I missed it earlier - Is there a particular reason you configured "--single-ended" option in the test? Single-ended testing is used for testing to iperf hosts that are not running pscheduler. I'm assuming both your hosts are running pScheduler so no need to enable it in the Toolkit GUI test configuration.

Normally iperf and iperf3 are started and stopped on demand via pScheduler, not run as persistent daemons.

Regards,

--

Szymon Trocha
Poznań Supercomputing & Networking Center

General NOC phone +48 61-858-2015 | noc.pcss.pl
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