Publications
Showing 30 results for Author: Jim H. Rogers II
Mar, 2016
Book Chapter
GPU Acceleration of the Locally Selfconsistent Multiple Scattering Code for First Principles Calculation of the Ground State and Statistical Physics of Materials
The Locally Self-consistent Multiple Scattering (LSMS) code solves the first principles Density Functional theory Kohn-Sham equation for a wide range of materials with a special focus on metals, alloys and metallic nano-structures. It has traditionally exhibited near perfect scalability on massively parallel high performance computer architectures. We present our efforts t…
Jul, 2015
Conference Paper
Experience with GPUs on the Titan Supercomputer from a Reliability, Performance and Power Perspective
Jun, 2015
Conference Paper
Understanding and Exploiting Spatial Properties of System Failures on Extreme-Scale HPC Systems
As we approach exascale, the scientific simulations are expected to experience more interruptions due to increased system failures. Designing better HPC resilience techniques requires understanding the key characteristics of system failures on these systems. While temporal properties of system failures on HPC systems have been well-investigated, there is limited understand…
Mar, 2015
Conference Paper
Understanding GPU Errors on Large-scale HPC Systems and the Implications for System Design and Operation
Nov, 2014
Conference Paper
Best Practices and Lessons Learned from Deploying and Operating Large-Scale Data-Centric Parallel File Systems
Oak Ridge Leadership Computing Facility (OLCF) has deployed multiple world-class parallel file systems to support its compute, data analysis, and visualization platforms. After deployment, OLCF has continued to hone operating strategies for these systems in response to rapidly changing technologies and user demands. OLCF's file systems have also served as test platforms fo…
Jun, 2013
Conference Paper
OLCF’s 1 TB/s, Next-Generation Lustre File System
The Oak Ridge Leadership Computing Facility (OLCF) at Oak Ridge National Laboratory (ORNL) has a long history of deploying the world’s fastest super- computers to enable open science. At the time it was deployed in 2008, the Spider file system had a formatted capacity of 10 PB and sustained transfer speeds of 240 GB/s which made it the fastest Lustre file system in the wor…
Jun, 2012
Conference Paper
Titan: Early experience with the Cray XK6 at Oak Ridge National Laboratory
In 2011, Oak Ridge National Laboratory began an upgrade to Jaguar to convert it from a Cray XT5 to a Cray XK6 system named Titan. This is being accomplished in two phases. The first phase, completed in early 2012, replaced all of the XT5 compute blades with XK6 compute blades, and replaced the SeaStar interconnect with Cray’s new Gemini network. Each compute node is config…