"We've eliminated the need for the TeraGrid-owned capital equipment," said Linda Winkler, who leads the XSEDE networking group, "making a more direct interconnect between XSEDE sites. This will save hundreds of thousands of dollars in equipment cost, as well as tens of thousands of dollars in annual maintenance."

 

XSEDE has transitioned to the NLR FrameNet service, which is part of the nationwide optical-fiber infrastructure of NLR, a consortium of more than 280 U.S. universities and private and government laboratories that provides high-performance network services for research and education. XSEDE replaced SONET/OC192 circuits with 10-GigE (10 gigabits per second Ethernet) connectivity to FrameNet for all core XSEDE service provider sites. XSEDE has a dedicated 10-GigE circuit from NLR between backbone nodes in Chicago and Denver. As with the predecessor TeraGrid service, all XSEDE participants have full site-to-site connectivity —including broadcast capability — between all the service provider sites.

 

The XSEDE networking group, led by Winkler (of Argonne National Laboratory in Chicago), spent the past few months switching the backbone infrastructure of the TeraGrid to the newer, more cost-effective technology. Each of the core XSEDE sites did the switch at a separate time to minimize impact to users. "As far as I know," said Winkler, "nobody noticed that we did the change, and in my estimation that's a job well done." 

 

The changed infrastructure provides flexibility to easily extend the XSEDE network as additional sites are included. "FrameNet has the advantages of a private network along with a rich set of connectivity options," added Winkler. "The footprint of FrameNet nodes across the country makes it feasible to extend the XSEDE network backbone to other cities and to add capacity to existing sites."

 

"National LambdaRail is pleased to provide high-performance networking connectivity for the XSEDE partners and the National Science Foundation," said Peter O'Neil, NLR vice president of research. "NLR was founded with the goal of supporting data-intensive computational science and research, and now, with long-term financial support in place, we are re-committed to this mission."    

 

In coming months, XSEDE networking staff will implement performance monitoring services that will make it easier for /researchers? to obtain optimum network performance.  In addition, networking staff will research alternative connection strategies, including the ability to take advantage of dynamic circuits on demand.

 

The eight core XSEDE service-provider sites directly affected by the network transition are: Indiana University, National Center for Supercomputing Applications, National Institute for Computational Sciences, National Center for Atmospheric Research, Pittsburgh Supercomputing Center, Purdue University, San Diego Supercomputer Center, and Texas Advanced Computing Center. 

 

More about XSEDE: https://xsede.org

More about NLR:  http://www.nlr.net