perfSONAR test from SDN-09 to SDN-01, SDN-02, and SDN-12

Jianan Wang ran a series of pefSONAR tests from approximately 12:00 AM on 9/3/13 to 4:00 AM on 9/4/13.

These test were run from SDN-09 (in NB154) to SDN-01 and SDN-02 in NB-145 (DSCR).

The results are shown below:

As expected, the performance that stayed ‘in chassis’ from SDN-09 to SDN-12 was constant at about 9 GBPS.  The performance achieved for inter chassis communication that is required to go through the core network on the openflow VRF showed significant variability.  Post testing it was determined that testing from machines in the DSCR to the OIT NAS heads in NB154 was responsible for the performance degradation during the day.  Given that SDN-01 and SDN-02 are in the same chassis we are not certain of the cause of the difference in performance between them during the period of midnight to 10 AM, but they appeared to converge to between 8 and 8.5 Gbps after midnight on the 3rd.