NERSC web pages

Status
Hopper (Cray XT5)
Franklin (Cray XT4)
Carver (IBM iDataPlex)
Euclid (Sun Sunfire)
PDSF (Linux cluster)
Magellan (Cloud testbed)
Dirac (GPU cluster)
HPSS (Storage)
Global File System
Network
More...

Support & Services

How to Get Help
Web Help Desk
New User's Guide
Passwords
Accounts & Allocations
HPC Consulting
Vis & Data Analysis
Software
User Surveys
NERSC Users' Group
More...

Science & Tech

Science Highlights
Past Research Results
Technical Reports
More...

Franklin, NERSC's Cray XT4, is among the largest machines on the list of Top 500 supercomputers in the world.

NERSC
is the flagship high performance scientific computing facility for research sponsored by the U.S. Department of Energy Office of Science. NERSC, a national facility located at Lawrence Berkeley National Laboratory, is a world leader in providing resources and services that accelerate scientific discovery through computation.

Now Computing

A small sample of massively parallel scientific computing jobs running right now at NERSC.

Project	Machine	CPU Cores
Climate Change Simulations with CCSM: Moderate and High Resolution Studies	Franklin	14,448
Computational Astrophysics Consortium	Franklin	8,192
Computational Astrophysics Consortium	Franklin	8,192
Climate Change Simulations with CCSM: Moderate and High Resolution Studies	Franklin	2,288
Electronic Structures and Properties of Complex Ceramic Crystals and Novel Materials	Hopper	1,024
Computational Resources for the FIRST (Fluid Interfaces: Reactions, Structure and Transport) EFRC Center	Hopper	288

Computational Nanoscience for Energy Conversion

Contour plots from Density Functional Theory calculations showing electronic density of states in a model highly mismatched alloy created by adding varying amounts of oxygen (3.125% in (a) and 6.25% in (b)) to a zinc (light blue) selenide (orange) compound. Oxygen atoms are surrounded by the dark-blue high density region.

Computations performed on Franklin have showed that introduction of oxygen impurities into a unique class of semiconductors known as "highly mismatched alloys" (HMAs) can substantially enhance the thermoelectric performance of these materials without the customary degradation in electric conductivity.

Thermoelectric materials involve direct conversion of temperature differences into electric voltage. In a paper published recently in Physical Review Letters, the researchers suggest that their results could allow a variety of abundant materials and new physics for scalable, widely tunable, high-thermopower thermoelectrics.

[ MORE...]

News Center

Take the NERSC Computer Security Tutorial

A new Cyber Security Tutorial is available. Users can help to keep NERSC more secure by understanding cyber security risks and taking precautions against them.

Hopper Phase 2 will be a Cray XE6 with a Gemini interconnect

The Gemini interconnect will improve performance of scientific applications as well as system reliability and resilience. You can see the Hopper Phase 2 cabinet covers.

Hadoop Available on the Magellan Cloud

The Hadoop environment is now available on Magellan. See Using Magellan.

Science News

Type 1a Supernovae Asymmetry

Simulations show that sources of variability in type 1a supernovae will have to be taken into account if astronomers are to use them as "standard candles" for measuring cosmic distances and the expansion of the universe. The work, done by NERSC user Stan Woosley and others, used multi-dimensional simulations to show that the asymmetry of these stellar explosions is a key factor.
[MORE]

About NERSC

News & Media

Systems