Learn More
Large parameter sweep studies are common in a broad range of scientific disciplines. However, many challenges exist in supporting this type of computation in a widely distributed computing environment. These challenges exist because contributing sites in a federated distributed computing environment usually expose only a very narrow resource-sharing(More)
The Computational Chemistry Grid (CCG) is a 3-year, National Middleware Initiative (NMI) program to develop cyberinfrastructure for the chemistry community. CCG is led bypercomputing Applications. In this paper we discuss our experience developing the CCG cyber-infrastructure in the first year of the project. We pay special attention to sociological as well(More)
Dual-processor nodes are the preferred building blocks in HPC clusters because of the greater performance-to-price ratio of such configurations relative to clusters comprising single-processor nodes. The arrival of 64-bit commodity clusters for HPC is advantageous for large space applications that require memory and I/O addressing beyond the 32-bit support.(More)
Dual-processor (2P) systems are the preferred building blocks in commodity Linux clusters because of their greater peak performance-to-price ratio relative to single-processor (1P) systems. However, running memory-intensive applications on 2P systems can lead to performance degradation if the memory subsystem cannot fulfill the increased demand from the(More)
A 3.7 teraflops Cray-Dell Linux cluster based on Intel Xeon processors will be installed at the Texas Advanced Computing Center early this summer. It will represent a transition from the T3E line of massively parallel processing systems that served researchers at The University of Texas. Code migration to an IA-32 microarchitecture will benefit from the(More)
may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. ABSTRACT The presence of cirrus clouds introduces complex heating and cooling effects on the atmosphere and can also interfere with remote(More)
Incident angle dependencies of LADAR reflection depend on bulk material reflectivity and surface texture properties that can be exploited for surface identification. In this paper, surface identification via multiband LADAR reflected radiance is assessed using the nonconventional exploitation factors data system database. A statistics-based dimension(More)
The Parallel Virtual File System (PVFS) [1] is a shared file system for Linux clusters. PVFS distributes I/O services on multiple nodes within a cluster and allows applications parallel access to files. Also, the abstraction of I/O services as a " virtual " file system provides a high flexibility in the location of the I/O services within the cluster. For(More)
  • 1