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InTheLoop | 05.23.2011

May 23, 2011

CS Staff Giving 11 Talks at Cray User Group Meeting

The 53rd Cray User Group (CUG) meeting, “Golden Nuggets of Discovery,” is being held this week (May 23–26) in Fairbanks, Alaska, hosted by the Arctic Region Supercomputing Center. Nick Cardo of NERSC is CUG president and will lead the business sessions. NERSC and CRD staff are giving 11 talks:

  • Katie Antypas: Transitioning Applications from the Franklin XT4 System with 4 Cores per Node to the Hopper XE6 System with 24 Cores per Node
  • Katie Antypas: Performance of Atomic and Molecular Collision Codes on the Cray XE6
  • Julian Borrill: Cosmic Microwave Background Data Analysis at the Petascale and Beyond
  • Tina Butler: DVS, GPFS and External Lustre at NERSC — How It’s Working on Hopper
  • Jonathan Carter: The Hopper System: How the Largest XE6 in the World Went From Requirements to Reality
  • Kirsten Fagnan: Acceleration of Porous Media Simulations on the Cray XE6 Platform
  • Yun (Helen) He: Benchmark Performance of Different Compilers on a Cray XE6
  • Jim Mellander: High Performance Network Intrusion Detection in the HPC Environment
  • Praveen Narayanan and Alice Koniges: Performance Characterization and Implications for Magnetic Fusion Co-Design Applications
  • Nicholas Wright: The NERSC–Cray Center of Excellence: Performance Optimization for the Multicore Era
  • Zhengji Zhao: Performance of Density Functional Theory codes on Cray XE6

CITRIS Is Hosting Two Workshops This Week

Berkeley-INRIA-Stanford’11 (BIS’11) is a joint workshop hosted by CITRIS on the UC Berkeley Campus on May 23–24, 2011 and co-organized by CITRIS and INRIA (the French National Institute for Research in Computer Science and Control) in partnership with UC Berkeley and Stanford University. BIS’11 is the first workshop launched within the framework of the joint research program INRIA@SiliconValley. The objectives of this workshop are to present the current state of scientific collaborations and to work on proposals for future ambitious joint projects. Click here for free registration.

Speakers from Berkeley Lab Computing Sciences include:

  • Jim Demmel: Communication-optimal algorithms for linear algebra
  • Esmond Ng and Xiaoye Sherry Li: Scalable hybrid solvers for large sparse linear systems of equations on petascale computing architectures
  • Kathy Yelick: Research challenges and opportunities in exascale computing
  • Tony Drummond: Toward smart-tuned post-petascale libraries and methods

“From Data Collection to Display: How Visualization Transforms Industries” is an all-day workshop on Thursday, May 26, in Banatao Auditorium, Sutardja Dai Hall at UC Berkeley. Telecommunication and IT technologies are driving dramatic and significant change across a range of industries. The conference showcases cutting-edge technologies from startups and industry leaders that enable visualization of data and analysis in real-time. We will cover various aspects of video communications, including Generating of Data, Communications, Immersive Multimedia Displays and Industry Cases, and will address a broad range of applications and services, including video processing and delivery, service issues and perspectives on areas of future development. Half-price registration ($49.50) is available; use the code “VIPDISCOUNT.”


This Week’s Computing Sciences Seminars

Efficient Code Constructions for Reliable Distributed Storage
Tuesday, May 24, 2:00–3:00 pm, 521 Cory Hall (Hogan Room), UC Berkeley
P. Vijay Kumar, Indian Institute of Science and University of Southern California

In a distributed storage (DS) system, information is dispersed across nodes in a network in such a manner that an end-user can retrieve the data stored by tapping into a subset of the nodes. When compared with data replication, erasure codes such as RS codes provide increased resiliency in the face of node failures.

Regenerating codes, introduced by Dimakis et al., go one step beyond erasure codes by minimizing in addition, the amount of data that has to be downloaded to bring up a failed node. The first part of the talk will provide an overview of some optimal constructions for regenerating codes. The second part will describe a recent simple, yet promising framework for the construction of a DS code. Under this framework, the DS code can be built up of any pair of erasure codes and further, data download or node repair is accomplished simply through erasure decoding of the constituent codes. In exchange for some loss in network-connection flexibility when compared with a regenerating code, the DS code could with judicious choice of constituent codes, be made to offer advantages such as the simultaneous minimization of storage space and repair-bandwidth or low-complexity operation.


Link of the Week: Civilization—Is the West History?

Historian Niall Ferguson explores the changing global balance of power in this RSA video. Six cultural “killer apps” are no longer the exclusive property of Western civilization—the whole world has downloaded them.



About Computing Sciences at Berkeley Lab

The Lawrence Berkeley National Laboratory (Berkeley Lab) Computing Sciences organization provides the computing and networking resources and expertise critical to advancing the Department of Energy's research missions: developing new energy sources, improving energy efficiency, developing new materials and increasing our understanding of ourselves, our world and our universe.

ESnet, the Energy Sciences Network, provides the high-bandwidth, reliable connections that link scientists at 40 DOE research sites to each other and to experimental facilities and supercomputing centers around the country. The National Energy Research Scientific Computing Center (NERSC) powers the discoveries of 6,000 scientists at national laboratories and universities, including those at Berkeley Lab's Computational Research Division (CRD). CRD conducts research and development in mathematical modeling and simulation, algorithm design, data storage, management and analysis, computer system architecture and high-performance software implementation. NERSC and ESnet are DOE Office of Science User Facilities.

Lawrence Berkeley National Laboratory addresses the world's most urgent scientific challenges by advancing sustainable energy, protecting human health, creating new materials, and revealing the origin and fate of the universe. Founded in 1931, Berkeley Lab's scientific expertise has been recognized with 13 Nobel prizes. The University of California manages Berkeley Lab for the DOE’s Office of Science.

DOE’s Office of Science is the single largest supporter of basic research in the physical sciences in the United States, and is working to address some of the most pressing challenges of our time. For more information, please visit science.energy.gov.