Presented at the 2000 APIII Conference Return to 2000 Abstract Index
INITIAL ANALYSIS OF PERFORMANCE TESTING OF PROTOCOLS IN NEXT GENERATION INTERNET AND VIRTUAL PRIVATE NETWORK FOR TELEMICROSCOPY APPLICATIONS
University
of Pittsburgh
Pittsburgh, Pennsylvania
Fanglin Zheng
Communication protocols testing is an activity to detect
as early as possible errors in protocol implementations
and to improve their quality. Today's performance testing
is a passive activity in the sense, that the performance
of communication protocols is measured and evaluated. In
high-speed networks, time and performance issues of communication
protocols are as important as their functional correctness.
For the communication among telemicroscopy applications
impose new quality of service (QoS) and performance requirements
on network system components and on protocols in particular.
Image data and its metadata transfer must be not only fast
but also be realized with guaranteed delivery.
The performance testing on the existing NGI network among participating institutes of HUBS (Hospitals, Universities, Businesses, Schools) project has been implemented. A network performance testing tool Iperf, which measures maximum TCP and UDP bandwidth (reminiscent of ttcp and nettest), treno, traceroute were being used. The test is run as a client/server application among not only a peer-peer basis but also peer-multiple-peer, during pick time and off-peak time. The results measured in terms of UPD buffer size, TCP bandwidth, UDP loss rate, Latency are evaluated and analyzed. In addition, bottleneck problem caused by slow Ethernet towards fast NGI and VPN is discussed.
The near future work is the real time performance testing of applications on-line on both existing NGI and pre-VPN. Four levels of measurement which can be profitably accomplished are pure network measurements via tools of iperf, treno, ping, traceroute, pseudo-Applications, Applications-to-Applications, User Experience.
This work* is part of Collaborative Telemicroscopy Applications Group of the HUBS (Hospitals, Universities, Businesses, and Schools) project. It is expected that the document will be reviewed, added to, improved, and shared by wide range of contributors before being published in final form.
Keywords: Performance Testing, Protocol, NGI, VPN, QoS, HUBS
*This work is sponsored by DARPA HUBS F30602-00-C-0009.
