Ohio State University

Displaying 1-40 of 163 results

  • White Papers // Dec 2003

    Organic Food Labels: A Customer Intercept Survey of Central Ohio Food Shoppers

    This document provides a summary of a customer intercept survey of customers in six central Ohio grocery stores- two suburban, two inner city and two rural. The survey addressed customer awareness of the USDA National Organic Program (NOP), particularly for processed foods. Also studied were customer willingness to pay for...

    Provided By Ohio State University

  • White Papers // Mar 2010

    Visualizing Data in Criminal Justice

    For the most part, the methods were developed early in the last century, when collecting data was an expensive proposition. For this reason, to reduce the cost of data collection many of the methods were predicated on taking random samples. Moreover, analyzing data could take hours or days, even with...

    Provided By Ohio State University

  • White Papers // Apr 2010

    Elastic Cloud Caches for Accelerating Service-Oriented Computations

    Computing as a utility, that is, on-demand access to computing and storage infrastructure has emerged in the form of the Cloud. In this model of computing, elastic resource allocation, i.e., the ability to scale resource allocation for specific applications should be optimized to manage cost versus performance. Meanwhile, the wake...

    Provided By Ohio State University

  • White Papers // Jan 2010

    QoS-Based Multicast Routing for Distributing Layered Video to Heterogeneous Receivers in Rate-Based Networks

    This paper design an effective multicast routing algorithm for distributing layered multicast video to heterogeneous receivers in networks with rate-based link schedulers. The multicast tree constructed by the algorithm fulfills the QoS requirements imposed by heterogeneous receivers both in terms of bandwidth and delay, and at the same time, consumes...

    Provided By Ohio State University

  • White Papers // Jan 2010

    Dynamic Reconfigurability Support for Providing Soft QoS Guarantees in Cluster-Based Multi-Tier Data-Centers Over InfiniBand

    Current cluster-based data-centers are configured as multiple tiers, each with specific functionalities and containing multiple nodes. Over-provisioning of nodes in these data-center tiers is an accepted approach to provide Quality of Service (QoS) guarantees due to the unpredictability of incoming requests. However, this approach is not cost-effective due to the...

    Provided By Ohio State University

  • White Papers // Jan 2010

    Towards Provision of Quality of Service Guarantees in Job Scheduling

    Considerable research has focused on the problem of scheduling dynamically arriving independent parallel jobs on a given set of resources. There has also been some recent work in the direction of providing differentiated service to different classes of jobs using statically or dynamically calculated priorities assigned to the jobs. However,...

    Provided By Ohio State University

  • White Papers // Aug 2009

    RDMA Over Ethernet - A Preliminary Study

    Though convergence has been a buzzword in the net-working industry for sometime now, no vendor has successfully brought out a solution which combines the ubiquitous nature of Ethernet with the low latency and high performance capabilities that InfiniBand offers. Most of the overlay protocols introduced in the past have had...

    Provided By Ohio State University

  • White Papers // Jan 2010

    Approximate Medial Axis for CAD Models

    Several researches have pointed out the potential use of the medical axis in various geometric modeling applications. The computation of the medial axis for a three dimensional shape often becomes the major bottleneck in these applications. Towards this end, in a recent work, the authors suggested an efficient algorithm that...

    Provided By Ohio State University

  • White Papers // Jan 2010

    A Decomposition-Based Probabilistic Framework for Estimating the Selectivity of XML Twig Queries

    In this paper the authors present a novel approach for estimating the selectivity of XML twig queries. Such a technique is useful for approximate query answering as well as for determining an optimal query plan, based on said estimates, for complex queries. The approach relies on summary structure that contains...

    Provided By Ohio State University

  • White Papers // Dec 2010

    Beyond Block I/O: Rethinking Traditional Storage Primitives

    Over the last twenty years the interfaces for accessing persistent storage within a computer system have remained essentially unchanged. Simply put, seek, read and write have defined the fundamental operations that can be performed against storage devices. These three interfaces have endured because the devices within storage subsystems have not...

    Provided By Ohio State University

  • White Papers // Dec 2009

    Fast Checkpointing by Write Aggregation With Dynamic Buffer and Interleaving on Multicore Architecture

    Large scale compute clusters continue to grow to ever-increasing proportions. However, as clusters and applications continue to grow, the Mean Time Between Failures (MTBF) has reduced from days to hours. As a result, fault tolerance within the cluster has become imperative. MPI, the de-facto standard for parallel programming, is widely...

    Provided By Ohio State University

  • White Papers // Jun 2009

    Designing Efficient FTP Mechanisms for High Performance Data-Transfer Over InfiniBand

    The rapid growth of InfiniBand, 10 Gigabit Ethernet/ iWARP and IB WAN extensions is increasingly gaining momentum for designing high end computing clusters and data-centers. For typical applications such as data staging, content replication and remote site backup etc., FTP has been the most popular method to transfer bulk data...

    Provided By Ohio State University

  • White Papers // Jul 2009

    Designing and Evaluating MPI-2 Dynamic Process Management Support for InfiniBand

    Dynamic process management is a feature of MPI-2 that allows an MPI process to create new processes and manage communication with these processes. The dynamic creation of processes allows application writers to develop multiscale applications or master/worker based programs. Although several MPI implementations support this feature the authors are not...

    Provided By Ohio State University

  • White Papers // Aug 2009

    Design Alternatives for Implementing Fence Synchronization in MPI-2 One-Sided Communication for InfiniBand Clusters

    Scientific computing has seen an immense growth in recent years. The Message Passing Interface (MPI) has become the de-facto standard for parallel programming model for distributed memory systems. As the system scale increases, application writers often try to increase the overlap of computation and communication. The MPI-2 standard expanded MPI...

    Provided By Ohio State University

  • White Papers // Aug 2009

    Reducing Network Contention With Mixed Workloads on Modern Multicore Clusters

    Multi-core systems are now extremely common in modern clusters. In the past commodity systems may have had up to two or four CPUs per compute node. In modern clusters, these systems still have the same number of CPUs, however, these CPUs have moved from single-core to quad-core and further advances...

    Provided By Ohio State University

  • White Papers // Aug 2009

    Designing Next Generation Clusters: Evaluation of InfiniBand DDR/QDR on Intel Computing Platforms

    Clusters based on commodity components continue to be very popular for High-Performance Computing (HPC). These clusters must be careful to balance both computational as well as I/O requirements of applications. This I/O requirement is generally fulfilled by a high-speed interconnect such as InfiniBand. The balance of computational and I/O performance...

    Provided By Ohio State University

  • White Papers // Jan 2011

    Designing NFS With RDMA for Security, Performance and Scalability

    NFS has traditionally used TCP or UDP as the underlying transport. However, the overhead of these stacks has limited both the performance and scalability of NFS. Recently, high-performance network such as InfiniBand have been deployed. These networks provide low latency of a few microseconds and high bandwidth for large messages...

    Provided By Ohio State University

  • White Papers // Jan 2011

    IMCa: A High Performance Caching Front-End for GlusterFS on InfiniBand

    With the rapid advances in computing technology, there is an explosion in media that needs to collected, cataloged, stored and accessed. With the speed of disks not keeping pace with the improvements in processor and network speed, the ability of network file systems to provide data to demanding applications at...

    Provided By Ohio State University

  • White Papers // Jan 2011

    Enhancing the Performance of NFSv4 With RDMA

    NFS is a widely deployed storage technology. It has gone through several revisions. One of the latest revisions, v4 has started to become deployed. NFSv4 on OpenSolaris uses TCP as the underlying transport. This has limited its performance. In this paper, the authors take on the challenge of designing an...

    Provided By Ohio State University

  • White Papers // Jan 2011

    High Performance Virtual Machine Migration With RDMA Over Modern Interconnects

    One of the most useful features provided by Virtual Machine (VM) technologies is the ability to migrate running OS instances across distinct physical nodes. As a basis for many administration tools in modern clusters and data-centers, VM migration is desired to be extremely efficient to reduce both migration time and...

    Provided By Ohio State University

  • White Papers // Jul 2010

    RDMA-Based Job Migration Framework for MPI Over InfiniBand

    Coordinated checkpoint and recovery is a common approach to achieve fault tolerance on large-scale systems. The traditional mechanism dumps the process image to a local disk or a central storage area of all the processes involved in the parallel job. When a failure occurs, the processes are restarted and restored...

    Provided By Ohio State University

  • White Papers // Jun 2010

    Improving Application Performance and Predictability Using Multiple Virtual Lanes in Modern Multi-Core InfiniBand Clusters

    Network congestion is an important factor affecting the performance of large scale jobs in supercomputing clusters, especially with the wide deployment of multi-core processors. The blocking nature of current day collectives makes such congestion a critical factor in their performance. On the other hand, modern interconnects like InfiniBand provide one...

    Provided By Ohio State University

  • White Papers // Jul 2010

    High Performance Design and Implementation of Nemesis Communication Layer for Two-Sided and One-Sided MPI Semantics in MVAPICH2

    High End Computing (HEC) systems are being deployed with eight to sixteen compute cores, with 64 to 128 cores/node being envisioned for exascale systems. MVAPICH2 is a popular implementation of MPI-2 specifically designed and optimized for InfiniBand, iWARP and RDMA over Converged Ethernet (RoCE). MVAPICH2 is based on MPICH2 from...

    Provided By Ohio State University

  • White Papers // Aug 2010

    Design and Evaluation of Generalized Collective Communication Primitives With Overlap Using ConnectX-2 Offload Engine

    Collective communication operations provided by the Message Passing Interface (MPI) are heavily used by scientific applications at large scale. The current MPI standard, MPI-2.2, only defines blocking collective communication calls and it is expected that MPI-3 will allow for non-blocking collective communication. While it is possible to allow simultaneous computation...

    Provided By Ohio State University

  • White Papers // Mar 2010

    High Performance Data Transfer in Grid Environment Using GridFTP Over InfiniBand

    GridFTP, designed by using the Globus XIO framework, is one of the most popular methods for performing data transfers in the Grid environment. But the performance of GridFTP in WAN is limited by the relatively low communication bandwidth offered by existing network protocols. On the other hand, modern interconnects such...

    Provided By Ohio State University

  • White Papers // Feb 2010

    An MPI-Stream Hybrid Programming Model for Computational Clusters

    The MPI programming model hides network type and topology from developers, but also allows them to seamlessly distribute a computational job across multiple cores in both an intra and inter node fashion. This provides for high locality performance when the cores are either on the same node or on nodes...

    Provided By Ohio State University

  • White Papers // Mar 2010

    Designing Topology-Aware Collective Communication Algorithms for Large Scale InfiniBand Clusters: Case Studies With Scatter and Gather

    Modern high performance computing systems are being increasingly deployed in a hierarchical fashion with multi-core computing platforms forming the base of the hierarchy. These systems are usually comprised of multiple racks, with each rack consisting of a finite number of chassis, and each chassis having multiple compute nodes or blades,...

    Provided By Ohio State University

  • White Papers // Feb 2010

    Designing High-Performance and Resilient Message Passing on InfiniBand

    Clusters featuring the InfiniBand interconnect are continuing to scale. As an example, the "Ranger" system at the Texas Advanced Computing Center (TACC) includes over 60,000 cores with nearly 4,000 InfiniBand ports. The latest Top500 list shows 30% of systems and over 50% of the top 100 are now using InfiniBand...

    Provided By Ohio State University

  • White Papers // Feb 2011

    Private Equity In The 21st Century: Cash Flows, Performance, And Contract Terms From 1984-2010

    Using detailed data on the quarterly cash flows and management contracts for a large sample of private equity funds from 1984-2010, the authors investigate the behavior of private equity cash flows, the determinants of contractual terms, including General Partner (GP) compensation and capital commitments, and the relation between contractual terms...

    Provided By Ohio State University

  • White Papers // Jul 2011

    Can Voluntary Programs Resolve China's Environmental Crisis? An Analysis Of ISO 14001 Certification In A Sample Of Chinese Firms

    China's rapid economic growth has been accompanied by rapid environmental degradation. China is currently the largest producer of greenhouse gasses in the world. China is also home to 20 of the 30 most polluted cities in the world. Weak federal oversight leads to poor enforcement of environmental regulations at the...

    Provided By Ohio State University

  • White Papers // Jan 2011

    Database Support for Data-Driven Scientific Applications in the Grid

    In this paper the authors describe a services oriented software system to provide basic database support for efficient execution of applications that make use of scientific datasets in the Grid. This system supports two core operations: efficient selection of the data of interest from distributed databases and efficient transfer of...

    Provided By Ohio State University

  • White Papers // Sep 2010

    Summarizing Transactional Databases With Overlapped Hyperrectangles

    Transactional data are ubiquitous. Several methods, including frequent itemsets mining and co-clustering, have been proposed to analyze transactional databases. In this paper, the authors propose a new research problem to succinctly summarize transactional databases. Solving this problem requires linking the high level structure of the database to a potentially huge...

    Provided By Ohio State University

  • White Papers // Jan 2011

    Combining Distributed Memory and Shared Memory Parallelization for Data Mining Algorithms

    In this paper, the authors focus on using a cluster of SMPs for scalable data mining. They have developed distributed memory and shared memory parallelization techniques that are applicable to a number of common data mining algorithms. These techniques are incorporated in a middleware called FREERIDE (FRamework for Rapid Implementations...

    Provided By Ohio State University

  • White Papers // Jan 2011

    Simultaneous Optimization of Complex Mining Tasks With a Knowledgeable Cache

    With an increasing use of data mining tools and techniques, the authors envision that a Knowledge Discovery and Data Mining System (KDDMS) will have to support and optimize for the following scenarios: Sequence of Queries: a user may analyze one or more datasets by issuing a sequence of related complex...

    Provided By Ohio State University

  • White Papers // Jan 2011

    A Systematic Approach for Optimizing Complex Mining Tasks on Multiple Databases

    Many real world applications involve not just a single dataset, but a view of multiple datasets. These datasets may be collected from different sources and/or at different time instances. In such scenarios, comparing patterns or features from different datasets and understanding their relationships can be an extremely important part of...

    Provided By Ohio State University

  • White Papers // Jan 2011

    New Sampling-Based Estimators for OLAP Queries

    One important way in which sampling for approximate query processing in a database environment differs from traditional applications of sampling is that in a database, it is feasible to collect accurate summary statistics from the data in addition to the sample. This paper describes a set of sampling-based estimators for...

    Provided By Ohio State University

  • White Papers // Jan 2011

    An Algorithm for In-Core Frequent Itemset Mining on Streaming Data

    Frequent itemset mining is a core data mining operation and has been extensively studied over the last decade. This paper takes a new approach for this problem and makes two major contributions. First, the authors present a one pass algorithm for frequent itemset mining, which has deterministic bounds on the...

    Provided By Ohio State University

  • White Papers // Jan 2011

    Discovering Frequent Topological Structures From Graph Datasets

    The problem of finding frequent patterns from graph-based datasets is an important one that finds applications in drug discovery, protein structure analysis, XML querying, and social network analysis among others. In this paper the authors propose a framework to mine frequent large-scale structures, formally defined as frequent topological structures, from...

    Provided By Ohio State University

  • White Papers // Jul 2010

    Design and Analysis of Systems Based on RF Receivers With Multiple Carbon Nanotube Antennas

    In this paper, possible uses of systems composed of multiple CNT-based EM receivers are introduced and their communication-theoretical analysis developed. Four possible example applications that involve multiple CNTs are discussed and their system-level designs are emphasized. Then, a communication-theoretical analysis of the performance of a generic system that involves multiple...

    Provided By Ohio State University

  • White Papers // Jan 2010

    On Secrecy Capacity Scaling in Wireless Networks

    The broadcast nature of the wireless communication makes it susceptible to eavesdropping. This motivates considering secrecy as a Quality of Service (QoS) constraint that must be accounted for in the network design. The scaling laws of wireless networks under the assumption of pre-distributed private keys was studied in. However, it...

    Provided By Ohio State University