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Harness High Performance Computing Workbench

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Harness is a collaborative computer science research effort of Oak Ridge
National Laboratory (ORNL), the University of Tennessee Knoxville, and Emory
University in advanced software solutions for parallel and distributed computing
systems with an emphasis on scientific high performance computing (HPC). While
past Harness work focused on heterogeneous distributed virtual machine and fault
tolerant runtime environments, ongoing research targets optimized scientific
application development and deployment processes. The following two paragraphs
describe ongoing and past work in more detail.







Harness Workbench: Unified and Adaptive Access to Diverse HPC Platforms  The
goal of this project is to enhance the overall productivity of applications
science on diverse high performance computing platforms by conducting research
in two innovative software environments. The first is the Harness Workbench
Toolkit (HWT) for application building and execution that provides a common view
across diverse HPC systems. The HWT consists of a software backplane
architecture that presents a uniform but extensible interface for preparatory
and pre-execution stages of application execution, which interfaces to
instance-specific software via customizable plug-in modules. The second is the
next generation Harness runtime environment (HRTE) that similarly provides a
flexible, adaptive framework for plugging in modules optimized for a specific
HPC system and allows dynamic interfacing to a variety of user environments.
Both these environments will employ platform specific pluggable modules
disseminating target-specific knowledge and expertise immediately to all
end-users who can continue to interface to a familiar environment.







Harness: Heterogeneous Distributed Computing  The heterogeneous adaptable
reconfigurable networked systems (Harness) research project focused on the
design and development of a pluggable lightweight heterogeneous Distributed
Virtual Machine (DVM) environment, where clusters of PCs, workstations, and
``big iron'' supercomputers can be aggregated to form one giant DVM (in the
spirit of its widely-used predecessor, Parallel Virtual Machine (PVM)). As part
of the Harness project, a variety of experiments and system prototypes were
developed to explore lightweight pluggable frameworks, adaptive reconfigurable
runtime environments, assembly of scientific applications from software modules,
parallel plug-in paradigms, highly available DVMs, fault-tolerant message
passing (FT-MPI), fine-grain security mechanisms, and heterogeneous
reconfigurable communication frameworks. Three different Harness system
prototypes were developed, two C variants and one Java-based alternative, each
concentrating on different research issues. The technology developed within the
Harness project influenced many other research and development efforts, such as
Open MPI and MOLAR



   

This research is sponsored by the Office of Advanced Scientific Computing
Research; Office of Science; U.S. Department of Energy. The work is performed
jointly at Oak Ridge National Laboratory, which is managed by UT-Battelle, LLC
under Contract No. De-AC05-00OR22725, the University of Tennessee Knoxville, and
Emory University. Please contact engelmannc@ornl.gov with questions or comments
regarding this page.