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内存云分级存储架构下的数据迁移模型
郭刚 于炯 鲁亮 英昌甜 尹路通
为了实现在线海量数据的高效存储与访问,在内存云分级存储架构下,提出一种基于数据重要性的迁移模型(MMDS)。首先,通过数据本身的大小、时间重要性、用户访问总量等因素对数据本身的重要性进行计算;其次,采用推荐系统中相似用户和PageRank算法中的重要性排名思想对数据的潜在价值进行评估,数据重要性和潜在价值共同决定了数据的重要程度;然后基于数据的重要性,设计了数据迁移
日期:01/23/2016 09:29:55 作者:郭刚 于炯 鲁亮 英昌甜 尹路通 点击:96
云计算条件下我国网络侦查的困惑及出路
欧阳爱辉
随着网络技术的迅猛发展,云计算得到了广泛应用。而在云计算条件下,出于打击犯罪需要,网络侦查也被大量应用到司法实践中。但因云计算条件下的网络侦查自身地位尚未获得我国法律明文认可,侦查范围、方式欠缺法律法规明确指引,技术相对滞后,具体程序和监督救济机制缺乏,在当前还存在诸多困惑。文章认为要解决这些困惑出路主要包括不断完善相关法律法规,及时更新侦查取证技术并不断发展完善反侦查取证技术,设置监督
日期:10/06/2015 10:31:54 作者:欧阳爱辉 点击:1220
基于云计算平台的服务自动化部署机制研究
北京邮电大学 张容齐
本文完成了如下工作:1.研究并提出了一种基于云计算平台的服务自动化部署机制。为了更具通用性,我们从两个层面进行研究:1)操作系统级别的自动化部署,它为云计算平台指定符合其要求的虚拟机镜像,并借助云计算平台的计算组件完成镜像的上传、注册以及虚拟机的启动;2)应用级别的自动化部署,它借助开源的部署框架,使用客户端/服务端的模式,结合云计算平台的网络架构,通过在线/离线部署方式将
日期:08/19/2015 07:52:32 作者:张容齐 点击:591
面向云计算的众核处理器三维存储体系结构研究
谭海 李国强 王柳 谌洪茂
众核芯片系统存在吞吐量低、加速比不能与其片内处理核数的增长成线性比例等问题,无法发挥出相应的计算能力,目前的众核微体系结构并不匹配MapReduce运行时.针对上述问题,为实现高性能众核芯片系统巨大计算和处理能力目标,文中分析了众核MapReduce的执行模型,基于DOT模型构建了众核存储体系,对其中的片上网络、通信模式、访存流程及基于此的MapReduce存储模
日期:08/13/2014 07:55:37 作者:谭海 李国强 王柳 谌洪茂 点击:729
A Task Execution Framework for Cloud-Assisted Sensor Networks
Hai-Long Shi(石海龙), Dong Li(李 栋), Jie-Fan Qiu(邱杰凡), Chen-Da Hou(侯陈达) and Li Cui(崔 莉)
日期:03/20/2014 07:27:34 作者: 点击:424
同构Hadoop集群环境下改进的延迟调度算法
柯何杨, 杨群
日期:05/13/2013 08:31:56 作者:柯何杨, 杨群, 王立松, 段汐 点击:974
Utility computing, elastic computing, and cloud computing are all terms that refer to the concept of dynamically provisioning processing time and storage space from a ubiquitous “cloud” of computational resources. Such systems allow users to acquire and release the resources on demand and provide ready access to data from processing elements, while relegating the physical location and exact parameters of the resources. Over the past few years, such systems have become increasingly popular, but nearly all current cloud computing offerings are either proprietary or depend upon software infrastructure that is invisible to the research community. In this work, we present Eucalyptus, an open-source software implementation of cloud computing that utilizes compute resources that are typically available to researchers, such as clusters and workstation farms. In order to foster community research exploration of cloud computing systems, the design of Eucalyptus emphasizes modularity, allowing researchers to experiment with their own security, scalability, scheduling, and interface implementations. In this paper, we outline the design of Eucalyptus, describe our own mplementations of the modular system components, and provide results from experiments that measure performance and scalability of an Eucalyptus installation currently deployed for public use. The main contribution of our work is the presentation of the first research-oriented open-source cloud computing system focused on enabling methodical investigations into the programming, administration, and deployment of systems exploring this novel distributed computing model.
日期:06/30/2009 00:40:29 作者: 点击:2555
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