perfSONAR User Q&A and Other Discussion

["John Emery" <>]

We have a great Perfsonar/Maddash Map setup with a central management pSconfig
json file.  I have noticed that we are getting frequent small spikes in the
Loss graphs and when I dig into the details they almost always lose about
600ish packets.  This leads me to believe that this is standard "ramp up" loss
that is expected.  I would like to eliminate the ramp up period of the test so
my graphs reflect smooth operation not spikey which is a little hard to
explain away to non technical folks.  I cannot find anywhere in the
documentation the correct XML to insert into my probe.json file to ignore the
first few seconds of a test.  If I configure a probe manually through the
probe GUI ignoring the first few seconds of a test is an option.  Below are my
test tasks.. Any suggestions would be appreciated.

    "tests": {
        "throughput_test": {
            "type": "throughput",
            "spec": {
                "source": "{% address[0] %}",
                "dest": "{% address[1] %}",
                "duration": "PT30S"
            }
        },
        "latencybg_test": {
            "type": "latencybg",
            "spec": {
                "source": "{% address[0] %}",
                "dest": "{% address[1] %}",
                "packet-interval": 0.1,
                "packet-count": 600
            }
        },
        "trace_test": {
            "type": "trace",
            "spec": {
                "source": "{% address[0] %}",
                "dest": "{% address[1] %}"
            }
        },
        "rtt_test": {
            "type": "rtt",
            "spec": {
                "source": "{% address[0] %}",
                "dest": "{% address[1] %}",
                "count": 10,
                "interval": "PT1S",
                "length": 1000
            }
        }
    },

Best regards,

John