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The University of California, at San Diego and Yale University have been awarded a collaborative grant by the National Science Foundation (NSF) to develop a Neuroscience Gateway (NSG) that gives neuroscientists broadened access to essential supercomputing resources.

Under the UC San Diego grant, the university's San Diego Supercomputer Center (SDSC) and its Neuroscience Information Framework project will create a software infrastructure that can be used to make neuroscience-specific tools conveniently available to students and investigators.

The project, called "Advanced Biological Informatics Development: Building A Community Resource for Neuroscientists," will offer compute time to neuroscience users through a streamlined process using a simple web portal-based environment for uploading models, retrieving and storing data, and specifying the parameters for running supercomputing-based neuronal simulations, including querying the status and completion of various jobs. The NSG portal, which is under development, will be available at http://www.nsgportal.org/.

"This gateway will allow neuroscientists to use HPC resources without having to have detailed knowledge about the implementation of the codes on HPC resources, or know all the complexities of how supercomputers work," said SDSC researcher Amit Majumdar, principal investigator for the collaborative award.

The project will enable members of the neuroscience community, including scientists, professors, and students, to use large resources for research and instruction and to run leading simulation and analysis packages to perform tasks such as computational modeling of cells and large neural networks. This will benefit all students and researchers, especially those who lack access to supercomputing resources and are thus at a significant disadvantage compared to the very few who have it, by removing the barriers for progress for many including historically underrepresented groups.

"Many of these investigators and students would otherwise find it very difficult, if not impossible, to implement and study models that press or exceed the storage and computing speed capabilities that are under their direct control," said Majumdar, who directs the scientific computing applications group at SDSC and is also part of UC San Diego's Department of Radiation Medicine and Applied Sciences.

Subha Sivagnanam and Kenneth Yoshimoto, both from SDSC and who have expertise in software engineering and parallel supercomputing, will help develop the neuroscience gateway. They have been running performance studies of the neuronal simulation software NEURON on SDSC's Triton supercomputer cluster, which is an Appro HyperGreen Cluster. The design utilizes 90%-plus efficient power supplies and a 20% power reduction compared with standard rack servers. The cluster features Appro gB222X Blade Server nodes with dual quad-core Intel Xeon E5530 processors with Intel Microarchitecture Nehalem, running at 2.40 GHz. Each of the 256 nodes has 24 gigabytes of memory and an eight-megabyte cache. In addition, Triton has four front-end nodes to handle administrative tasks. The cluster has a peak theoretical throughput of approximately 20 teraflops and contains six terabytes of memory. SC Online selected the Appro HyperGreen Supercomputing Clusters for our 2009 Product of the Year Award.

"Such a gateway will help advance research by lowering or eliminating the administrative and technical barriers that currently make it difficult for neuroscientists to use HPC resources," said Maryann Martone, principal investigator of the Neuroscience Information Framework (NIF) project, and co-principal investigator for the UC San Diego Neuroscience Gateway award. "This work aligns well with the NIF project which provides a portal into the largest source of neuroscience tools and data on the web and is housed in the Center for Research in Biological Systems (CRBS) at UC San Diego. The gateway will also provide a community forum for neuroscientists to collaborate and share their data."

NIF's Anita Bandrowski, a neuroscientist, and Vadim Astakhov, also a parallel computing expert, will help in designing and testing the gateway. Ted Carnevale, principal investigator of the Yale grant, and Michael Hines, both from the Neurobiology Department at the Yale School of Medicine, are also involved in this project. They are the developers of the NEURON software which will be available via the science gateway. Other neuronal software to be provided by the gateway includes GENESIS3, MOOSE, PyNN, and NEST.

"The past two decades have seen an accelerating growth in the use of computational modeling in neuroscience," said Carnevale. "It has also revealed a research bottleneck in terms of accessing and using cyberinfrastructure and there is a broad consensus that the wider computational neuroscience community needs easier access to complex cyberinfrastructure (CI) and HPC resources."

Specifically, the NSG architecture will transparently distribute user jobs to appropriate supercomputing resources provided by various NSF supercomputer centers. The systems are part of the agency's Extreme Science and Engineering Discovery Environment (XSEDE), one of the most advanced, powerful, and robust collection of integrated advanced digital resources and services in the world.

The NSG team will also collaborate with developers of neural simulation software to optimally install, test, and benchmark these applications, and allow developers to test new versions before release. Project leaders will also target the promotion of the NSG to underrepresented minority scientists and minority serving institutions through active participation in summer training academies and a network of previously mentored female and minority students, some now employed at minority serving institutions.

Storing Larger Datasets in the SDSC Cloud
Majumdar said that one goal of the Neuroscience Gateways project is to use the SDSC Cloud to store results of large neuronal simulations. "The idea is to move the output files produced on various HPC resources to the SDSC Cloud where they will be secure and easily accessed and shared," he said. "If the output data size is smaller, the gateway will allow the users to zip up the output file and email them the output. For larger size output files we are considering associated data transfer, access, and storage issues from the very beginning, and we will be prepared to handle larger simulations and the larger datasets that come with them."

Growing Popularity of Science Gateways
Science gateways have shown tremendous growth in terms of the number of users, the number of processing hours used on supercomputing resources by the broader user community, and in the number of published research papers enabled. Gateways can also be readily used for teaching classes, workshops, and tutorials without having to set up codes on resources, or create new accounts for students/attendees.

For example, the CIPRES Science Gateway, (CIPRES stands for Cyber Infrastructure for Phylogenetic RESearch), created by SDSC researchers for the phylogenetics research community, has proved extremely popular. The number of users submitting jobs to CIPRES Science Gateway increased from 132 per month in December 2009 to more than 700 per month in April 2012. An average of 140 new users ran one or more jobs on CIPRES in every month of operation, and the number of repeat users has increased steadily.

"During the past three quarters, CIPRES Gateway users represented 28% or more of all active XSEDE users, indicating that this interface has been successful in enabling access to XSEDE HPC and cyberinfrastructure resources," said Mark Miller, principal investigator of the CIPRES Gateway.

In addition, a recent survey showed that use of the CIPRES Gateway during 2010 and 2012 enabled at least 384 publications, with 25 more in press, illustrating potential for dramatic impact of Gateway projects on scientific progress, according to Miller. Similar metrics of success and impact, including usage for teaching classes/tutorials, have been demonstrated by other Science Gateways, such as the nanoHUB, GRIDCHEM, and ROBETTA.

The collaborative Neuroscience Gateway grant between UC San Diego and Yale, for three years, totals just over $805,000. The NSF award numbers are 1146949 for UC San Diego, and 1146830 for Yale University.