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Cloud providers seek to maximize their market share. Traditionally, they deploy datacenters with sufficient capacity to accommodate their entire compute demand while maintaining geographical affinity to its customers. Achieving these goals by a single cloud provider is increasingly unrealistic from a cost of ownership perspective. Moreover, the carbon emissions from underutilized datacenters place...
Enterprises that host services in the cloud need to protect their cloud resources using network services such as firewalls and deep packet inspection systems. While middleboxeshave typically been used to implement such network functions in traditional enterprisenetworks, their use in cloud environments by cloud tenants is problematic due to the boundary between cloud providers and cloud tenants. Insteadwe...
Software-Defined Networking (SDN) has great potentials in changing the fragile and complex enterprise networks. One operational challenge to SDN deployment is the settlement of legacy switches. A hybrid SDN consisting of both SDN and legacy switches may be a tradeoff. Nevertheless most of the current SDN control planes can not handle legacy switches. To overcome this problem, we present HybridFlow,...
Resource management in distributed environments, such as Cloud virtualized networks, is one of the main concerns of infrastructure providers. Despite the many advantages of centralized solutions, their unique point of failure and the lack of scalability make us consider the use of distributed and autonomic solutions. Beyond this, centralized solutions would be inefficient to deal with dynamic and...
This paper describes the design and implementation of a virtualized information and communications technology (ICT) resource management system called “Management Engine” (ME) for carrier network services to realize flexible service operation and dynamic resource accommodation between multiple services in the cloud computing era. To facilitate network services using virtualized ICT resources in a carrier...
While people get used to surfing web, managing the overload of web applications has become a critical problem for application providers. Targeting overload issue of complex, dynamic web applications, this paper presents an adaptive service degradation approach. Our approach attempts to automatically locate the bottleneck inside the applications and generate proper degradation plans in real time. This...
Enterprise storage systems are generally shared by multiple servers in a SAN environment. Our experiments as well as industry reports have shown that disk arrays show poor performance when multiple servers share one RAID due to resource contention as well as frequent disk head movements. We have studied IO performance characteristics of several shared storage settings of practical business operations...
Network systems have evolved connecting various types of terminals and machines such as M2M system and sensor networks. On the other hand, the cloud data centers that have enormous processing capacity have been constructed by installing thousands of servers. New services will be created by connecting these resources. In this paper, three technical issues for M2M and cloud data center connected system...
As the Web Services technology is widely used in the enterprise's core business, how to manage these resources is becoming to extremely important problem. In this paper, after analysising the characteristics of resouce management in distributed environment and the main content of WSDM, a novel Web Service management scheme is introduced, and then the main components in the scheme is introduced, as...
In cloud computing environment, virtual machine technology is used as a means of flexibly assigning workloads to real machines based on the workloads' static profiles. Though this technology aims at flexible and dynamic resource sharing, memory is underutilized in cloud environments. We propose a virtual swap management mechanism (VSMM) that enables flexible and dynamic memory sharing via a local...
Performance assurance has become an important aspect in grid and cloud computing which provide services over the Internet, and Service Level Agreements (SLA) are frequently contracted between users and the service providers. However, the I/O performance of the storage or data access service is still provided on a best effort basis. Some distributed storage systems implement performance reservation,...
On-demand resource provision is one of the key features of cloud computing, allowing applications to grow or shrink on the basis of dynamic workloads. Thus far, most of the research on leveraging on-demand resource provision has focused on batch style applications for scientific computation or Web-centric applications, especially n-tier e-commerce applications. Very little research, however, has focused...
This paper presents an autonomic system for composing ubiquitous applications at run-time. The applications are composed according to the user preferences collected via a physical user interface. This interface allows users to specify preferences by simple actions of touching with their mobile terminals icons in the environment, instead of explicitly selecting resources and dealing with their properties...
Next generation services are a trend that places emphasis on providing value-added services. This trend remains a challenge to telecommunication operators who in an effort to survive and remain relevant, now have to contend with managing their existing network-based services as well as their new application-based next generation services. A critical implication is that operation management systems,...
High-performance storage systems are evolving towards decentralized commodity clusters that can scale in capacity, processing power, and network throughput. Building such systems requires: (a)Sharing physical resources among applications; (b)Sharing data among applications; (c) Allowing customized views of data for applications. Current solutions satisfy typically the first two requirements through...
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