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Ohio State University
(238 results)-
White Papers
On Secrecy Capacity Scaling in Wireless Networks
January 26, 2010, 12:00am PST
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...
Provided by Ohio State University
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White Papers
Joint Power and Secret Key Queue Management for Delay Limited Secure Communication
December 21, 2009, 12:00am PST
In recent years, the famous wiretap channel has been revisited by many researchers and information theoretic secrecy has become an active area of research in this setting. In this paper, the...
Provided by Ohio State University
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White Papers
On the Speedup Required to Achieve 100% Throughput for Multicast Over Crossbar Switches
March 28, 2008, 12:00am PDT
Applications requiring QoS support for multicast traffic remain to be important in small and large scale networks. The problem of providing quality of service guarantees for multicast traffic over...
Provided by Ohio State University
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White Papers
Detecting Worms Via Mining Dynamic Program Execution
October 9, 2008, 12:00am PDT
Worm attacks have been major security threats to the Internet. Detecting worms, especially new, unseen worms, is still a challenging problem. In this paper, the authors propose a new worm...
Provided by Ohio State University
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White Papers
Pattern Mutation in Wireless Sensor Deployment
July 28, 2009, 12:00am PDT
In this paper, the authors study the optimal deployment pattern problem in Wireless Sensor Networks (WSNs). They propose a new set of patterns, particularly when sensors' communication range (rc)...
Provided by The Ohio State University
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White Papers
The Influence Of Trends And Reversals In Earnings Surprises On Stock Return Predictability
July 1, 2007, 12:00am PDT
The authors find that trends and reversals in past earnings surprises predict future stock returns. These earnings surprise sequences produce a 9.88% risk-adjusted annual return which cannot be...
Provided by Ohio State University
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White Papers
Database Support for Data-Driven Scientific Applications in the Grid
January 1, 2011, 12:00am PST
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....
Provided by Ohio State University
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White Papers
Parameterized Specification, Configuration and Execution of Data-Intensive Scientific Workflows
February 23, 2010, 12:00am PST
Data analysis processes in scientific applications can be expressed as coarse-grain workflows of complex data processing operations with data flow dependencies between them. Performance...
Provided by Ohio State University
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White Papers
Combining Distributed Memory and Shared Memory Parallelization for Data Mining Algorithms
January 1, 2011, 12:00am PST
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...
Provided by Ohio State University
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White Papers
A Systematic Approach for Optimizing Complex Mining Tasks on Multiple Databases
January 1, 2011, 12:00am PST
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...
Provided by Ohio State University
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White Papers
New Sampling-Based Estimators for OLAP Queries
January 1, 2011, 12:00am PST
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...
Provided by Ohio State University
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White Papers
An Algorithm for In-Core Frequent Itemset Mining on Streaming Data
January 1, 2011, 12:00am PST
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....
Provided by Ohio State University
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White Papers
Simultaneous Optimization of Complex Mining Tasks With a Knowledgeable Cache
January 1, 2011, 12:00am PST
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...
Provided by Ohio State University
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White Papers
Summarizing Transactional Databases With Overlapped Hyperrectangles
September 1, 2010, 12:00am PDT
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...
Provided by Ohio State University
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White Papers
Discovering Frequent Topological Structures From Graph Datasets
January 1, 2011, 12:00am PST
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...
Provided by Ohio State University
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White Papers
Support Vector Machines in Face Recognition With Occlusions
March 20, 2009, 12:00am PDT
Support Vector Machines (SVM) is one of the most useful techniques in classification problems. One clear example is face recognition. However, SVM cannot be applied when the feature vectors...
Provided by Ohio State University
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White Papers
Private Equity In The 21st Century: Cash Flows, Performance, And Contract Terms From 1984-2010
February 1, 2011, 12:00am PST
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...
Provided by Ohio State University
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Whitepapers
A High-Fidelity Temperature Distribution Forecasting System for Data Centers
September 15, 2012, 12:00am PDT
Data centers have become a critical computing infrastructure in the era of cloud computing. Temperature monitoring and forecasting are essential for preventing over heating induced server...
Provided by Ohio State University
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Whitepapers
Performance of Low-Complexity Greedy Scheduling Policies in Multi-Channel Wireless Networks: Optimal Throughput and Near-Optimal Delay
December 10, 2012, 12:00am PST
In this paper, the authors focus on the scheduling problem in multi-channel wireless networks, e.g., the downlink of a single cell in Fourth Generation (4G) OFDM-based cellular networks. Their...
Provided by Ohio State University
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Whitepapers
Scheduling Heterogeneous Delay Tolerant Tasks in Smart Grid With Renewable Energy
April 13, 2012, 12:00am PDT
The smart grid is the new generation of electricity grid that can efficiently facilitate new distributed sources of energy (e.g., harvested renewable energy), and allow for dynamic electricity...
Provided by Ohio State University
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Whitepapers
Maximizing Information in Unreliable Sensor Networks Under Deadline and Energy Constraints
November 22, 2012, 12:00am PST
The authors study the problem of maximizing the information in a wireless sensor network with unreliable links. They consider a sensor network with a tree topology, where the root corresponds to...
Provided by Ohio State University
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Whitepapers
Maximizing System Throughput Using Cooperative Sensing in Multi-Channel Cognitive Radio Networks
September 4, 2012, 12:00am PDT
In Cognitive Radio Networks (CRNs), unlicensed users are allowed to access the licensed spectrum when it is not currently being used by Primary Users (PUs). To guarantee a high system throughput...
Provided by Ohio State University
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Whitepapers
Exploiting Double Opportunities for Deadline Based Content Propagation in Wireless Networks
January 15, 2013, 12:00am PST
In this paper, the authors focus on mobile wireless networks comprising of a powerful communication center and a multitude of mobile users. They investigate the propagation of deadline-based...
Provided by Ohio State University
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Whitepapers
Retransmission Delays With Bounded Packets: Power Law Body and Exponential Tail
February 16, 2013, 12:00am PST
Retransmissions serve as the basic building block that communication protocols use to achieve reliable data transfer. Until recently, the number of retransmissions were thought to follow a...
Provided by Ohio State University
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Whitepapers
On Sample-Path Optimal Dynamic Scheduling for Sum-Queue Minimization in Forests
January 31, 2013, 12:00am PST
The authors investigate the problem of minimizing the sum of the queue lengths of all the nodes in a wireless network with a forest topology. Each packet is destined to one of the roots (sinks) of...
Provided by Ohio State University
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Whitepapers
Performance Analysis of Work-Conserving Schedulers for Minimizing Total Flow-Time With Phase Precedence
October 6, 2012, 12:00am PDT
The authors consider the problem of minimizing the total flow-time of multiple jobs in a pool of multiple homogeneous machines, where the jobs arrive over time and have to be served with phase...
Provided by Ohio State University
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White Papers
From Kansei to KanseiGenie: Architecture of Federated, Programmable Wireless Sensor Fabrics
November 29, 2009, 12:00am PST
This paper deals with challenges in federating wireless sensing fabrics. Federations of this sort are currently being developed in next generation global end-to-end experimentation...
Provided by Ohio State University
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White Papers
A Stability-Oriented Approach to Improving BGP Convergence
January 1, 2011, 12:00am PST
This paper shows that the elimination of fault-agnostic instability, the instability caused by fault-agnostic distributed control, substantially improves BGP convergence speed. To this end, the...
Provided by Ohio State University
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White Papers
Secure Neighbor Discovery Through Overhearing in Static Multihop Wireless Networks
May 7, 2010, 12:00am PDT
In wireless ad-hoc and sensor networks, neighbor discovery is one of the first steps performed by a node upon deployment and disrupting it adversely affects a number of routing, MAC, topology...
Provided by Ohio State University
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White Papers
QoI-Based Resource Allocation for Multi-Target Tracking in Energy Constrained Sensor Networks
May 6, 2011, 12:00am PDT
Motivated by the need to judiciously allocate scarce sensing resources, and account for fusing information from multi-modal sensors, the authors develop a solutions methodology for maximizing the...
Provided by Ohio State University
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White Papers
Deadline Constrained Scheduling for Data Aggregation in Unreliable Sensor Networks
March 9, 2011, 12:00am PST
The authors study the problem of maximizing the aggregated information in a wireless sensor network. They consider a sensor network with a tree topology, where the root corresponds to the sink,...
Provided by Ohio State University
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White Papers
On Optimal Dynamic Scheduling for Sum-Queue Minimization in Trees
March 27, 2011, 12:00am PDT
The authors investigate the problem of minimizing the sum of the queues of all the nodes in a wireless network with a tree topology. Nodes send their packets to the tree's root (sink). They...
Provided by Ohio State University
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White Papers
Communication Efficient Signal Detection in Correlated Clutter for Wireless Sensor Networks
November 24, 2010, 12:00am PST
The authors study a problem of detecting deterministic signals buried in correlated clutter using wireless sensor networks. They are specifically interested in developing a distributed algorithm...
Provided by Ohio State University
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White Papers
Maximizing Aggregated Revenue in Sensor Networks Under Deadline Constraints
August 12, 2009, 12:00am PDT
In this paper, the authors have developed a general optimization framework for solving the problem of maximizing revenue in data aggregation trees when a deadline is imposed by the sink. They...
Provided by Ohio State University
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White Papers
Maximizing Aggregated Information in Sensor Networks Under Deadline Constraints
April 12, 2011, 12:00am PDT
The authors study the problem of maximizing the aggregated information in sensor networks with deadline constraints. The model is that of a sensor network that is arranged in the form of a tree...
Provided by Ohio State University
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White Papers
Peer-to-Peer Spatial Queries in Sensor Networks
January 1, 2011, 12:00am PST
Sensor networks that consist of potentially several thousands of nodes each with sensing (heat, sound, light, magnetism, etc.) and wireless communication capabilities provide great opportunities...
Provided by Ohio State University
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White Papers
Structure-Free Data Aggregation in Sensor Networks
January 1, 2011, 12:00am PST
Data aggregation protocols can reduce the communication cost, thereby extending the lifetime of sensor networks. Prior works on data aggregation protocols have focused on tree-based or...
Provided by Ohio State University
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White Papers
Maximizing the Contact Opportunity for Vehicular Internet Access
December 21, 2009, 12:00am PST
With increasing popularity of media enabled hand-helds, the need for high data-rate services for mobile users is evident. Large-scale Wireless LANs (WLANs) can provide such a service, but they are...
Provided by Ohio State University
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White Papers
Joint Energy Management and Resource Allocation in Rechargeable Sensor Networks
December 21, 2009, 12:00am PST
Energy harvesting sensor platforms have opened up a new dimension to the design of network protocols. In order to sustain the network operation, the energy consumption rate cannot be higher than...
Provided by Ohio State University
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White Papers
Achieving Energy Efficiency With Transmission Pushbacks in Sensor Networks
April 8, 2008, 12:00am PDT
In sensor networks, application layer QoS requirements are critical to meet while conserving energy. One of the leading factors for energy wastage is failed transmission attempts due to channel...
Provided by Ohio State University
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White Papers
ARQ Security in Wi-Fi and RFID Networks
October 15, 2010, 12:00am PDT
In this paper, the authors present two practical ARQ-Based security schemes for Wi-Fi and RFID networks. The proposed schemes enhance the confidentiality and authenticity functions of these...
Provided by Ohio State University
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White Papers
Basic Tradeoffs for Energy Management in Rechargeable Sensor Networks
September 3, 2010, 12:00am PDT
As many sensor network applications require deployment in remote and hard-to-reach areas, it is critical to ensure that such networks are capable of operating unattended for long durations....
Provided by Ohio State University
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White Papers
Delay-Based Back-Pressure Scheduling in Multi-Hop Wireless Networks
November 29, 2010, 12:00am PST
Scheduling is a critical and challenging resource allocation mechanism for multi-hop wireless networks. It is well known that scheduling schemes that give a higher priority to the link with larger...
Provided by Ohio State University
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White Papers
On the Delay Limited Secrecy Capacity of Fading Channels
May 1, 2009, 12:00am PDT
In this paper, the delay limited secrecy capacity of the flat fading channel is investigated under two different assumptions on the available transmitter Channel State Information (CSI). The first...
Provided by Ohio State University
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White Papers
On the Optimality of the ARQ-DDF Protocol
February 7, 2008, 12:00am PST
The performance of the Automatic Repeat Request-Dynamic Decode and Forward (ARQ-DDF) cooperation protocol is analyzed in two distinct scenarios. The first scenario is the Multiple Access Relay...
Provided by Ohio State University
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White Papers
Throughput-Delay Analysis of Random Linear Network Coding for Wireless Broadcasting
January 20, 2011, 12:00am PST
In an unreliable single-hop broadcast network setting, the authors investigate the throughput and decoding delay performance of random linear network coding as a function of the coding window size...
Provided by Ohio State University
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White Papers
Control of Wireless Networks With Secrecy
March 18, 2011, 12:00am PDT
The authors consider the problem of cross-layer resource allocation in time-varying cellular wireless networks, and incorporate information theoretic secrecy as a Quality of Service constraint....
Provided by Ohio State University
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White Papers
Using Isabelle to Help Verify Code That Uses Abstract Data Types
April 14, 2009, 12:00am PDT
Verification of programs that use paper Data Types (ADTs) is an important piece of the grand challenge of verified software. It is the position that an interactive proof assistant, such as...
Provided by Ohio State University
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White Papers
Performance Analysis and Evaluation of Mellanox ConnectX InfiniBand Architecture With Multi-Core Platforms
June 15, 2007, 12:00am PDT
InfiniBand is an emerging networking technology that is gaining rapid acceptance in the HPC domain. Currently, several systems in the Top500 list use InfiniBand as their primary interconnect, with...
Provided by Ohio State University
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White Papers
Advanced Flow-Control Mechanisms for the Sockets Direct Protocol Over InfiniBand
May 31, 2007, 12:00am PDT
The Sockets Direct Protocol (SDP) is an industry standard to allow existing TCP/IP applications to be executed on high-speed networks such as InfiniBand (IB). Like many other high-speed networks,...
Provided by Ohio State University
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White Papers
Designing NFS With RDMA for Security, Performance and Scalability
January 1, 2011, 12:00am PST
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...
Provided by Ohio State University
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White Papers
High Performance MPI Over IWARP: Early Experiences
June 17, 2007, 12:00am PDT
Modern interconnects and corresponding High Performance MPIs have been feeding the surge in the popularity of compute clusters and computing applications. Recently with the introduction of the...
Provided by Ohio State University
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White Papers
Zero-Copy Protocol for MPI Using InfiniBand Unreliable Datagram
August 13, 2007, 12:00am PDT
Memory copies are widely regarded as detrimental to the overall performance of applications. High-performance systems make every effort to reduce the number of memory copies, especially the copies...
Provided by Ohio State University
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White Papers
High Performance Virtual Machine Migration With RDMA Over Modern Interconnects
January 1, 2011, 12:00am PST
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...
Provided by Ohio State University
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White Papers
Enhancing the Performance of NFSv4 With RDMA
January 1, 2011, 12:00am PST
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...
Provided by Ohio State University
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White Papers
IMCa: A High Performance Caching Front-End for GlusterFS on InfiniBand
January 1, 2011, 12:00am PST
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...
Provided by Ohio State University
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White Papers
Designing an Efficient Kernel-Level and User-Level Hybrid Approach for MPI Intra-Node Communication on Multi-Core Systems
June 20, 2008, 12:00am PDT
The emergence of multi-core processors has made MPI intra-node communication a critical component in high performance computing. In this paper, the authors use a three-step methodology to design...
Provided by Ohio State University
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White Papers
Efficient One-Copy MPI Shared Memory Communication in Virtual Machines
October 21, 2008, 12:00am PDT
Efficient intra-node shared memory communication is important for High Performance Computing (HPC), especially with the emergence of multi-core architectures. As clusters continue to grow in size...
Provided by Ohio State University
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White Papers
Designing Next Generation Clusters: Evaluation of InfiniBand DDR/QDR on Intel Computing Platforms
August 18, 2009, 12:00am PDT
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...
Provided by Ohio State University
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White Papers
ProOnE: A General-Purpose Protocol Onload Engine for Multi-And Many-Core Architectures
May 4, 2009, 12:00am PDT
Modern high-end computing systems utilize specialized offload engines to enhance various aspects of their processing. For example, high-speed networks such as InfiniBand, Quadrics and Myrinet...
Provided by Ohio State University
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White Papers
Reducing Network Contention With Mixed Workloads on Modern Multicore Clusters
August 10, 2009, 12:00am PDT
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...
Provided by Ohio State University
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White Papers
Design Alternatives for Implementing Fence Synchronization in MPI-2 One-Sided Communication for InfiniBand Clusters
August 7, 2009, 12:00am PDT
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....
Provided by Ohio State University
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White Papers
Designing and Evaluating MPI-2 Dynamic Process Management Support for InfiniBand
July 10, 2009, 12:00am PDT
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...
Provided by Ohio State University
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White Papers
Designing Efficient FTP Mechanisms for High Performance Data-Transfer Over InfiniBand
June 24, 2009, 12:00am PDT
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...
Provided by Ohio State University
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White Papers
Fast Checkpointing by Write Aggregation With Dynamic Buffer and Interleaving on Multicore Architecture
December 28, 2009, 12:00am PST
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...
Provided by Ohio State University
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White Papers
Designing High-Performance and Resilient Message Passing on InfiniBand
February 18, 2010, 12:00am PST
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...
Provided by Ohio State University
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White Papers
Designing Topology-Aware Collective Communication Algorithms for Large Scale InfiniBand Clusters: Case Studies With Scatter and Gather
March 19, 2010, 12:00am PDT
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...
Provided by Ohio State University
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White Papers
An MPI-Stream Hybrid Programming Model for Computational Clusters
February 21, 2010, 12:00am PST
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...
Provided by Ohio State University
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White Papers
High Performance Data Transfer in Grid Environment Using GridFTP Over InfiniBand
March 2, 2010, 12:00am PST
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...
Provided by Ohio State University
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White Papers
Design and Evaluation of Generalized Collective Communication Primitives With Overlap Using ConnectX-2 Offload Engine
August 18, 2010, 12:00am PDT
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...
Provided by Ohio State University
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White Papers
High Performance Design and Implementation of Nemesis Communication Layer for Two-Sided and One-Sided MPI Semantics in MVAPICH2
July 5, 2010, 12:00am PDT
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...
Provided by Ohio State University
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White Papers
Improving Application Performance and Predictability Using Multiple Virtual Lanes in Modern Multi-Core InfiniBand Clusters
June 25, 2010, 12:00am PDT
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...
Provided by Ohio State University
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White Papers
RDMA-Based Job Migration Framework for MPI Over InfiniBand
July 22, 2010, 12:00am PDT
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...
Provided by Ohio State University
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White Papers
Beyond Block I/O: Rethinking Traditional Storage Primitives
December 12, 2010, 12:00am PST
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...
Provided by Ohio State University
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White Papers
Minutiae: A Formal Methodology for Accurate Protocol Fingerprinting
October 23, 2007, 12:00am PDT
The authors study the new problem of network protocol fingerprinting, which has been recognized as both a threat to cyberspace privacy and a useful technique for intrusion detection. This paper...
Provided by Ohio State University
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White Papers
Monitoring Protocol Traffic With a MAGNeT
January 1, 2011, 12:00am PST
Network researchers have traditionally focused on monitoring, measuring, and characterizing traffic in the network to gain insight into building critical network components (e.g., protocol stacks,...
Provided by Ohio State University
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White Papers
MAGNET: A Tool for Debugging, Analyzing and Adapting Computing Systems
January 1, 2011, 12:00am PST
As computing systems grow in complexity, the cluster and grid communities require more sophisticated tools to diagnose, debug and analyze such systems. The authors have developed a toolkit called...
Provided by Ohio State University
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White Papers
A Greedy Link Scheduler for Wireless Networks With Gaussian Multiple Access and Broadcast Channels
December 21, 2009, 12:00am PST
Information theoretic Broadcast Channels (BC) and Multiple Access Channels (MAC) enable a single node to transmit data simultaneously to multiple nodes, and multiple nodes to transmit data...
Provided by Ohio State University
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White Papers
Energy Optimal Transmission Scheduling in Wireless Sensor Networks
February 16, 2010, 12:00am PST
One of the main issues in the design of sensor networks is energy efficient communication of time-critical data. Energy wastage can be caused by failed packet transmission attempts at each node...
Provided by Ohio State University
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White Papers
Rate Quantization and the Speedup Required to Achieve 100% Throughput for Multicast Over Crossbar Switches
January 1, 2011, 12:00am PST
The problem of providing quality of service guarantees for multicast traffic over crossbar switches has received a limited attention, despite the popularity of its counterpart for unicast traffic....
Provided by Ohio State University
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