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perfSONAR \[1\] is an international project to aid the collection and sharing of network related performance data. It provides an interface to such data via XML via schemetaschemata provided through the NMWG \[2\]. Metrics currently include one \[3\] and two way \[4\] latency, bandwidth \[5\] and throughput and network topology. Such information is architected using technologies such as XML and SQL Database, XPath and XQuery, SOAP and WSDLs.

\[1\] [http://www.perfsonar.net/]
\[2\] [http://nmwg.internet2.edu/ ]
\[3\] [http://www.internet2.edu/performance/owamp/]
\[4\] [http://www-iepm.slac.stanford.edu/pinger/]
\[5\] [http://www.internet2.edu/performance/bwctl/]
\[6\] [http://psps.perfsonar.net/index.html]