February 2008

FT IO team releases its optimized MPI-IO driver for Lustre as a part of MVAPICH

The IO working team of the Future Technologies group has released its optimized MPI-IO driver for Lustre as part of MVAPICH-1.0, the popular MPI package from the Ohio State University, Network-Based Computing Laboratory. This release enables Lustre stripe-aligned high performance parallel I/O for scientific benchmarks and applications such as NAS BT-IO and FLASH I/O applications. Further info on code download, installation, and performance is available on MVAPICH website.

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FT Reports on Low-Overhead Virtualization and Light-Weight Migration of HPC Parallel I/O using Xen and PVFS

FT group members Weikuan Yu and Jeffrey S. Vetter will be presenting their paper "A parallel I/O perspective for Xen-Based HPC" at the Eighth IEEE International Symposium on Cluster Computing and the Grid, in Lyon, France. The paper presents an analysis of HPC parallel I/O in a virtualized environment.

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FT Investigation on Characterization and Optimization of Large-Scale Parallel I/O on Jaguar

FT group members Weikuan Yu and Jeffrey S. Vetter, along with Sarp Oral of the NCCS Technology Integration group, will be presenting their paper "Performance Characterization and Optimization of Parallel I/O on the Cray XT" at the 22nd IEEE International Parallel and Distributed Processing Symposium in Miami, Florida. The paper presents an extensive characterization, tuning, and optimization of parallel I/O on the Cray XT supercomputer at Oak Ridge National Laboratory. This characterization covers both data- and metadata-intensive I/O patterns.

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FT investigation reveals popular scientific benchmarks do not accurately represent TLB behaviors of real applications

FT group members Collin McCurdy and Jeff Vetter, along with Alan Cox of Rice University, will be presenting their paper "Investigating the TLB Behavior of High-end Scientific Applications on Commodity Microprocessors," in Austin, TX this April at the 2008 IEEE International Symposium on Performance Analysis of Systems and Software (ISPASS’08). The paper is the culmination of work, undertaken as part of the PetaSSI FastOS project, seeking to understand the TLB behavior of scientific applications.

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