数据跨境流动的全球标杆城市:新加坡

随着经济持续发展以及人们对数字经济高度依赖,各国对于数据中心的需求将呈爆发式增长。新加坡作为数据跨境流动的全球标杆城市,做出了很好的示范。新加坡尽管国土面积狭小,但却是亚太地区第四大数据中心,仅次于日本、中国和印度。     

导言

本期《系统工程理论与实践》,我们设立了一个“大数据商务决策”专栏,选登了来自国家自然科学基金重大项目“大数据环境下的商务管理”的六篇优秀论文.随着移动互联网、物联网、云计算、智能技术等信息技术的高速发展和普及.全球数据量呈爆炸式增长,互联网数据中心(Internet Data Center,IDC)预计到2025年全球数据量将达到175 ZB.     

基于虚拟机的数据中心能耗测量

提出一种基于计算密集型与I/O密集型建立虚拟机动态能耗的数学模型方法.结合了设备运行状态参数，在模型功耗处于计算密集型时引入了虚拟机的CPU使用率与CPU频率，处于I/O密集型时引入了虚拟机的硬盘读写总字节数与内存读写总字节数计算功耗，并对功耗进行积分得出数据中心能耗.与常规方法相比该方法进一步细化了测量粒度，且在使用Wordcount运行任务与Sort运行任务进行节点能耗测试时，得出能耗的平均误差为0.062 5.实验结果在粒度细化的同时保证了常规方法的同级别测量精度.     

企业新风

<正>本土信号企业自主化技术取得突破近日,在全球最大的轨道交通展——第十届德国柏林国际轨道交通技术展览会(Inno Trans2014)期间,上海富欣智能交通控制有限公司接受了德国莱茵TUV集团颁发的Je Rail?CBTC系统SIL4(安全完整度等级最高级别)证书,标志着富欣智控历时7年、在相继获得ATS系统的SIL2级安全认证、ATP平台产品SIL4级安全认证、联锁系统的SIL4安全认证以及轨旁ATP和车载ATP的SIL4安全认证后,最终完     

小型数据中心气流组织及能耗优化

数据中心空调系统的首要任务是保证服务器的安全可靠运行.为了达到这个目标,很多数据中心的空调系统在欠负荷下运行,造成能源的浪费.这主要是因为气流组织的不合理造成局部区域报警从而启动了多余的制冷设备.为了节省能源和研究合理的气流组织,以一个存在上述问题的小型数据中心为例进行了研究.首先用数值分析的方法建立了数学模型,然后用实测数据提供了模拟中需要的边界条件,模拟得到其速度场和温度场情况,再用实测数据验证了模型模拟结果,然后根据实测和模拟结果用评价参数评价其能耗水平,最后提出改造方案.结果表明,在热扩散不好的区域增加智能风扇系统有效地改善了气流组织的情况,与一般的通风系统相比,这种系统每年可以降低38%的能耗.     

构建规模化数据中心 上海研发公共平台全面完善信息化建设

正上海研发公共服务平台通过部署数据库云服务器成功构建起规模化数据中心,为部署"上海市科技资源数据中心"及其他未来业务的扩展奠定了坚实基础。近年来,互联网正在渗透进社会的方方面面,信息化技术的不断应用不仅推动了公共服务的转型、创新和服务能力,同时也为政府向服务型转变注入了新的动力。随着云计算、物联网等     

On Peer-Assisted Data Dissemination in Data Center Networks: Analysis and Implementation简

Data Center Networks （DCNs） are the fundamental infrastructure for cloud computing. Driven by the massive parallel computing tasks in cloud computing, one-to-many data dissemination becomes one of the most important traffic patterns in DCNs. Many architectures and protocols are proposed to meet this demand. However, these proposals either require complicated configurations on switches and servers, or cannot deliver an optimal performance. In this paper, we propose the peer-assisted data dissemination for DCNs. This approach utilizes the rich physical connections with high bandwidths and mutli-path connections, to facilitate efficient one-to-many data dissemination. We prove that an optimal P2P data dissemination schedule exists for FatTree, a specially- designed DCN architecture. We then present a theoretical analysis of this algorithm in the general multi-rooted tree topology, a widely-used DCN architecture. Additionally, we explore the performance of an intuitive line structure for data dissemination. Our analysis and experimental results prove that this simple structure is able to produce a comparable performance to the optimal algorithm. Since DCN applications heavily rely on virtualization to achieve optimal resource sharing, we present a general implementation method for the proposed algorithms, which aims to mitigate the impact of the potentially-high churn rate of the virtual machines.     

Collaborative Network Security in Multi-Tenant Data Center for Cloud Computing简

A data center is an infrastructure that supports Internet service. Cloud comput the face of the Internet service infrastructure, enabling even small organizations to quickly ng is rapidly changing build Web and mobile applications for millions of users by taking advantage of the scale and flexibility of shared physical infrastructures provided by cloud computing. In this scenario, multiple tenants save their data and applications in shared data centers, blurring the network boundaries between each tenant in the cloud. In addition, different tenants have different security requirements, while different security policies are necessary for different tenants. Network virtualization is used to meet a diverse set of tenant-specific requirements with the underlying physical network enabling multi-tenant datacenters to automatically address a large and diverse set of tenants requirements. In this paper, we propose the system implementation of vCNSMS, a collaborative network security prototype system used n a multi-tenant data center. We demonstrate vCNSMS with a centralized collaborative scheme and deep packet nspection with an open source UTM system. A security level based protection policy is proposed for simplifying the security rule management for vCNSMS. Different security levels have different packet inspection schemes and are enforced with different security plugins. A smart packet verdict scheme is also integrated into vCNSMS for ntelligence flow processing to protect from possible network attacks inside a data center network     

基于教育云的高校数字教育资源建设研究

基于教育云的高校数字化教育资源的建设过程，主要是在基础设施建设时已经把不同的资源按物理路径分别放在教育云中，采用云计算模式的资源建设方式需要将分布式存储的数据库和一站式的检索界面结合起来，从而真正实现高校数字资源共享。     

利用云计算构建新型高效企业数据中心

本文简要介绍了企业数据中心建设存在的问题,云计算技术为企业IDC中心建设带来的各种优势,企业建设云计算中心的方案推荐及传统模式与云计算模式采购运行成本对比。