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NEX Facts

Project Description
NEX FACTS 11/21/2014 NEX Goal NEX User Tiers Current NEX Data Holdings Models available on NEX Tools and Libraries available on NEX Disk Storage Space Computing Hours Available NEX Goal The goal of the NASA Earth Exchange (NEX) is to enable enhanced and more efficient use of Earth observations for NASA Earth science technology, research and applications programs. NEX is a collaborative compute platform that improves the availability of Earth science data, models, analysis tools and scientific results through a centralized environment that fosters knowledge sharing, collaboration, innovation and direct access to compute resources. NEX User Tiers The NEX components (represented conceptually in Figure 1) include a web portal, prototyping sandbox and assets within the NASA Advanced Supercomputing (NAS) High-Performance Computing (HPC) environment. There are three principal user tiers with different access to resources: Earth Science Community Users The Earth Science Community Users have access to the web portal and all the associated collaboration and social networking tools. NEX Science Users The NEX Science Users have access to the web portal and the prototyping sandbox, which includes NEX tools and small sample of the datasets. NEX HPC Users The NEX HPC Users have access to all the components including the complete NEX data holdings and supercomputing resources. Figure 1. NEX Components and User Tiers Current NEX Data Holdings Click here for the list of available datasets Models available on NEX Click here for the list of available models Tools and Libraries available on NEX Click here for available tools and libraries. Disk Storage Space Pleiades 1.3 PB total Current Statistics - NEX "nobackup" allocation is under Nbp6 Sandboxes lnxsrv105: 163 TB total Computing Hours Available On Pleiades, PBS (version 10.4) is used to manage batch jobs that run on the compute nodes (4 different processor types, 11,232 nodes, 198,432 cores in total). The accounting unit is the Standard Billing Unit (SBU). The SBUs charged to a PBS job running on the compute node(s) is: SBU charged = Wall_Clock_Hours_Used * Number of MAUs * SBU Rate where the MAU represents the minimum allocatable unit of resources available through PBS. NEX has 342,493 SBUs available as of 11/21/2014.
Project Administrator(s):
Petr Votava

Members

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Petr Votava
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JENNIFER DUNGAN
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RAMAKRISHNA NEMANI
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Weile Wang
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Cristina Milesi
Sangram Ganguly
PIYUSH MEHROTRA