6,058 research outputs found
SLA-Oriented Resource Provisioning for Cloud Computing: Challenges, Architecture, and Solutions
Cloud computing systems promise to offer subscription-oriented,
enterprise-quality computing services to users worldwide. With the increased
demand for delivering services to a large number of users, they need to offer
differentiated services to users and meet their quality expectations. Existing
resource management systems in data centers are yet to support Service Level
Agreement (SLA)-oriented resource allocation, and thus need to be enhanced to
realize cloud computing and utility computing. In addition, no work has been
done to collectively incorporate customer-driven service management,
computational risk management, and autonomic resource management into a
market-based resource management system to target the rapidly changing
enterprise requirements of Cloud computing. This paper presents vision,
challenges, and architectural elements of SLA-oriented resource management. The
proposed architecture supports integration of marketbased provisioning policies
and virtualisation technologies for flexible allocation of resources to
applications. The performance results obtained from our working prototype
system shows the feasibility and effectiveness of SLA-based resource
provisioning in Clouds.Comment: 10 pages, 7 figures, Conference Keynote Paper: 2011 IEEE
International Conference on Cloud and Service Computing (CSC 2011, IEEE
Press, USA), Hong Kong, China, December 12-14, 201
HIL: designing an exokernel for the data center
We propose a new Exokernel-like layer to allow mutually untrusting physically deployed services to efficiently share the resources of a data center. We believe that such a layer offers not only efficiency gains, but may also enable new economic models, new applications, and new security-sensitive uses. A prototype (currently in active use) demonstrates that the proposed layer is viable, and can support a variety of existing provisioning tools and use cases.Partial support for this work was provided by the MassTech Collaborative Research Matching Grant Program, National Science Foundation awards 1347525 and 1149232 as well as the several commercial partners of the Massachusetts Open Cloud who may be found at http://www.massopencloud.or
SDN-controlled and Orchestrated OPSquare DCN Enabling Automatic Network Slicing with Differentiated QoS Provisioning
In this work, we propose and experimentally assess the automatic and flexible
NSs configurations of optical OPSquare DCN controlled and orchestrated by an
extended SDN control plane for multi-tenant applications with differentiated
QoS provisioning. Optical Flow Control (OFC) protocol has been developed to
prevent packet losses at switch sides caused by packet contentions.Based on the
collected resource topology of data plane, the optical network slices can be
dynamically provisioned and automatically reconfigured by the SDN control
plane. Meanwhile, experimental results validate that the priority assignment of
application flows supplies dynamic QoS performance to various slices running
applications with specific requirements in terms of packet loss and
transmission latency. In addition, the capability of exposing traffic
statistics information of data plane to SDN control plane enables the
implementation of load balancing algorithms further improving the network
performance with high QoS. No packet loss and less than 4.8 us server-to-server
latency can be guaranteed for the sliced network with highest priority at a
load of 0.5
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