Sequencer, privilege-based, and communication history algorithms are popular approaches to implement total ordering, where communication history algorithms are most suitable for parallel computingsystems, because the...
详细信息
ISBN:
(纸本)9781424412501
Sequencer, privilege-based, and communication history algorithms are popular approaches to implement total ordering, where communication history algorithms are most suitable for parallel computingsystems, because they provide best performance under heavy work load. Unfortunately, post-transmission delay of communication history algorithms is most apparent when a system is idle. In this paper, we propose a fast delivery protocol to reduce the latency of message ordering. the protocol optimizes the total ordering process by waiting for messages only from a subset of the machines in the group, and by fast acknowledging messages on behalf of other machines. Our test results indicate that the fast delivery protocol is suitable for both idle and heavy load systems, while reducing the latency of message ordering.
Multimodal Dynamic Optimisation is a challenging problem, used in this paper as a framework for the qualitative comparison between Evolutionary algorithms and Artificial Immune systems. It is argued that while Evoluti...
详细信息
ISBN:
(纸本)9783540739210
Multimodal Dynamic Optimisation is a challenging problem, used in this paper as a framework for the qualitative comparison between Evolutionary algorithms and Artificial Immune systems. It is argued that while Evolutionary algorithms have inherent diversity problems that do not allow them to successfully deal with multimodal dynamic optimisation, the biological immune system involves natural processes for maintaining and boosting diversity and thus serves well as a metaphor for tackling this problem. We review the basic evolutionary and immune-inspired approaches to multimodal dynamic optimisation, we identify correspondences and differences and point out essential computation elements.
Software engineering practitioners and researchers continue to face huge challenges in the development, maintenance, and use of software systems. this has been even more prominent withthe new paradigm of service orie...
详细信息
ISBN:
(纸本)9781595938121
Software engineering practitioners and researchers continue to face huge challenges in the development, maintenance, and use of software systems. this has been even more prominent withthe new paradigm of service oriented computing in which service integrators, developers, and providers need to create methods, tools, and techniques to support cost-effective development and use of dependable services and service oriented applications. this workshop provides a forum for presentations and discussions of topics related to service oriented software engineering paradigm.
the proceedings contain 43 papers. the topics discussed include: approximate analytical models for networked servers subject to MMPP arrival processes;using virtualization to improve software rejuvenation;impact of re...
详细信息
ISBN:
(纸本)0769529224
the proceedings contain 43 papers. the topics discussed include: approximate analytical models for networked servers subject to MMPP arrival processes;using virtualization to improve software rejuvenation;impact of request dispatching granularity in geographically distributed web systems;study of bursty Internet traffic;discovering web workload characteristics through cluster analysis;transparent and accurate traffic load estimation for enterprise wireless LAN;distributed subscription clustering with limited knowledge sharing for content-based publish/subscribe systems;fail-aware publish/subscribe;message diffusion in unstructured overlay networks;exploiting host name locality for reduced stretch P2P routing;security and performance analysis of a secure clustering protocol for sensor networks;and dynamic load balancing for network intrusion detection systems based on distributed architectures.
Accurate extraction of parasitics is an important pre-cursor to timing and signal integrity analysis. In deep sub-miron technologies, the interconnect cross-section areas of metal at various points in a layer are no l...
详细信息
ISBN:
(纸本)9780769527628
Accurate extraction of parasitics is an important pre-cursor to timing and signal integrity analysis. In deep sub-miron technologies, the interconnect cross-section areas of metal at various points in a layer are no longer the same - the metal can be etched differently with varying width and spacings and/or the top-surface of the interconnect layer may be non-planar due to Chemical Mechanical Polishing(CMP). Morever, the cross-sections are also becoming increasingly trapezoidal in nature. In such a scenario, computing resistances using counting squares technique and other two-dimensional methods may no longer be accurate. At the same time, using highly accurate techinques such as a fine-grained Finite Element Method (FEM) may not be feasible due to the large computation time. In this work, a three-dimensional FEM based resistance extractor that is fast and accurate has been implemented and compared with two other extractors, a counting squares based extractor and a meshing based extractor. the key behind this is an efficient domain discretization which is a Conformal decomposition of the original geometry.
Coupled clusters usually exhibit a heterogeneous but also hierarchical structure in terms of communication and computation. therefore, it is inevitable to adapt parallel applications to such systems in order to gain r...
详细信息
ISBN:
(纸本)9780769529172
Coupled clusters usually exhibit a heterogeneous but also hierarchical structure in terms of communication and computation. therefore, it is inevitable to adapt parallel applications to such systems in order to gain reasonable performance results. Moreover, also regular benchmark tools are not capable of exposing the latent potential of such coupled cluster systems. though without adapted (or better self-adapting) benchmark tools for such systems, it is almost not possible to forecast the scalability of well-adapted applications and one is not able to compare the possibly achievable performance in an application independent manner In this paper we present such a fair, self-adapting and meaningful benchmark tool for heterogeneous coupled cluster systems, following the MPI standard.
Fault tolerance engineering has been advocated as one of the main approaches to ensuring the overall system dependability. the 2nd international Workshop on Engineering Fault Tolerant systems (EFTS 2007) aims to inves...
详细信息
ISBN:
(纸本)9781595938121
Fault tolerance engineering has been advocated as one of the main approaches to ensuring the overall system dependability. the 2nd international Workshop on Engineering Fault Tolerant systems (EFTS 2007) aims to investigate how fault tolerance mechanisms can be taken into account when engineering complex software systems and to improve our understanding of where and how fault-tolerance should be integrated in the software life-cycle. the focus of the workshop is on developing novel models to be applied at different abstraction levels (requirements, architecture and design models for fault tolerance, together with new implementation schemes), innovative technologies (tools and frameworks for implementing distributed fault tolerant systems) and advanced verification environments (to assess the achieved level of fault tolerance and to evaluate the dependability properties of the systems). Recently there has been a growing interest in the areas directly related and overlapping with fault tolerance, such as self-healing, resilience, self-adaptation and self-management. the topics related to engineering of systems with such properties are in the scope of the workshop as the intention is to improve the current understanding of how fault tolerance engineering can benefit from research on these areas.
the proceedings contain 41 papers. the topics discussed include: robust location distinction using temporal link signatures;mining call and mobility data to improve paging efficiency in cellular networks;adaptive netw...
详细信息
ISBN:
(纸本)9781595936813
the proceedings contain 41 papers. the topics discussed include: robust location distinction using temporal link signatures;mining call and mobility data to improve paging efficiency in cellular networks;adaptive network coding and scheduling for maximizing throughput in wireless networks;superimposed code based channel assignment in multi-radio multi-channel wireless mesh networks;a general model of wireless interference;power law and exponential decay of inter contact times between mobile devices;the geometry of mobility;multicast capacity for large scale wireless Ad Hoc networks;optimal channel probing and transmission scheduling for opportunistic spectrum access;weak state routing for large scale dynamic networks;practical network coding in wireless networks;scheduling algorithms for multi-carrier wireless data systems;and designing localized algorithms for barrier coverage.
the proceedings contain 12 papers. the topics discussed include: self-healing BPEL processes with dynamo and the JBoss rule engine;resource discovery with evolving tuples;a component model for dynamic adaptive systems...
详细信息
ISBN:
(纸本)9781595937988
the proceedings contain 12 papers. the topics discussed include: self-healing BPEL processes with dynamo and the JBoss rule engine;resource discovery with evolving tuples;a component model for dynamic adaptive systems;a reuse-based approach to the correct and automatic composition of web-services;mobility management in B3G networks: a middleware-based approach;software deployment architecture and quality-of-service in pervasive environments;using proximity relations for the adaptation of mobile field services;a basis for performance property prediction of ubiquitous self-adapting systems;scaling up SLA monitoring in pervasive environments;towards model driven design of service-based context-aware applications;and engineering mobile field worker applications.
暂无评论