NetWatch vs perfSONAR

NetWatch has no write-up on Specifiction yet; its figures are above.

perfSONAR is a free, open-source network measurement toolkit for assessing performance across network paths and finding problems as they occur. It offers a common interface for scheduling measurements, storing results in uniform formats, retrieving data at scale, and generating visualizations. Operators coordinate tests across multiple nodes with a shared JSON mesh configuration; results can remain on each node or go to a central dashboard server. A standard node runs throughput or latency tests on one network interface, although simultaneous testing there may affect accuracy. The documentation covers Docker and Ansible deployment, a central archive with Grafana, and Client and esmond APIs for raw data access. perfSONAR is installed on an operator-controlled local server, so maintaining nodes and test configuration is required. It monitors packet loss and jitter, supports path visualization and synthetic tests, and is licensed under Apache License 2.0. The listed plan costs nothing.