FABRIC: A NationalScale Programmable Experimental Network Infrastructure FABRIC is a unique national research infrastructure to enable cuttingedge and exploratory research atscale in networking, cybersecurity, distributed computing and storage systems, machine learning, and science applications. It is an everywhereprogrammable nationwide instrument comprised of novel extensible network elements equipped with large amounts of compute and storage, interconnected by high speed, dedicated optical links. It will connect a number of specialized testbeds for cloud research (NSF Cloud testbeds CloudLab and Chameleon), for research beyond 5G technologies (Platforms for Advanced Wireless Research or PAWR), as well as production highperformance computing facilities and science instruments to create a rich fabric for a wide variety of experimental activities.

SCinet DTNasaService Framework Transferring big data over Wide Area Networks (WANs) is challenging because optimization is dependent on the specifics of multiple parameters. Network services, paths, and technologies have different characteristics, including loss rate, latency, and available capacity. Yet, frameworks currently used to configure and orchestrate transfer systems, measure performance, and analyze results have limited capabilities. We propose a framework, DTNasaService (DaaS), for highperformance network data transfers using and integration of techniques, including virtualization, network provisioning, and performance data analysis. This framework has a modular design for supporting multiple transfer tools, optimizers and orchestrators for the data transfer environment, including textitDocker and textitKubernetes. We present a textitJupyter based workflow for highspeed network data transfer in dataintensive science and evaluate the performance of the transfer with a simple programmable visualizer implemented in the framework. This framework has been implemented as a prototype at two recent SC supercomputing conferences. With the increase in the number and the capacity of WAN links at the conferences (multiple 100 Gbps WAN circuits), the challenges involved in setting up, testing, debugging, verifying and running applications on highperformance systems connecting to the conference SCinet WAN circuits also increase. The SCinet implementation of the DaaS framework for the conference community allowed users to control hardware, software, and network infrastructure for highspeed network data transfer, primarily for large scale applications. Through the evaluation of the framework in our test setup, we demonstrated that NVMe over Fabrics with TCP is twice as efficient compared to using conventional TCP in highspeed NVMetoNVMe transfers. We also implemented a 400 Gbps LAN experiment to evaluate the DaaS framework.