| Registration | Required |
|---|---|
| File size | 273.00kb - Check your internet speed |
| File format | PDF - Download the latest version of Adobe Acrobat Reader |
ZDNet / IT Library / IT Management / User Satisfaction / SLA /
An Efficient Method for Service Level Agreement Assessment
Publisher's description
On-line end-to-end Service Level Agreement (SLA) monitoring is of key importance nowadays. For this purpose, recent researches have focused on measuring (when possible), or estimating (most of the times) network Quality of Service (QoS) and performance parameters. Up to now, all the proposed solutions have the drawback of requiring a huge amount of resources with low accuracy, generally leading to unscalable systems. The paper observes, however, that the accurate estimation of network QoS parameters is not necessarily required for SLA assessment. What is required is an efficient and scalable method to directly detect SLA violations.
Similar whitepapers
Avoid the War Room and Missed SLAs: Supercharge Your Nightly Batch Cycle
The attendee of this webcast will learn key strategies for supercharging the nightly batch cycle with this webcast. The attendee will be able to complete the nightly batch cycle more quickly (providing with extra time to correct the inevitable errors), and meet the SLAs.
130 days ago by BMC Software DownloadService Level Agreement in Cloud Computing
Cloud computing that provides cheap and pay-as-you-go computing resource is rapidly gaining momentum as an alternative to traditional IT Infrastructure. As more and more consumers delegate their tasks to cloud providers, Service Level Agreements(SLA) between consumers and providers emerge as a key aspect. Due to the dynamic nature of the cloud, continuous monitoring on Quality of Service (QoS) attributes is necessary to enforce SLAs. Also numerous other factors such as trust (on the cloud provider) come into consideration, particularly for enterprise customers that may outsource its critical data. This complex nature of the cloud landscape warrants a sophisticated means of managing SLAs.
196 days ago by Wright State University DownloadHonoring SLAs on Cloud Computing Services: A Control Perspective
This work contains a short survey of recent results in the literature with a view to opening up new research directions for the problem of honoring SLAs on cloud computing services. This is a new problem that has attracted significant interest recently, due to the urgent need for providers to provide reliable, customized and QoS guaranteed computing dynamic environments for end-users as agreed in contracts on the basis of certain Service Level Agreements (SLAs). Honoring SLAs is a multi-faceted problem that may involve optimal use of the available resources, optimization of the system's performance and availability or maximization of the provider's revenue and it poses a significant challenge for researchers and system administrators due to the volatile, huge and unpredictable Web environments where these computing systems reside.
284 days ago by Aristotle University of Thessaloniki DownloadExploiting Semantics and Virtualization for SLA-Driven Resource Allocation in Service Providers
Resource management is a key challenge that service providers must adequately face in order to accomplish their business goals. This paper introduces a framework, the Semantically Enhanced Resource Allocator (SERA), aimed to facilitate service provider management, reducing costs and at the same time fulfilling the QoS agreed with the customers. The SERA assigns resources depending on the information given by the service providers according to its business goals and on the resource requirements of the tasks. Tasks and resources are semantically described and these descriptions are used to infer the resource assignments. Virtualization is used to provide an application specific and isolated virtual environment for each task.
286 days ago by John Wiley & Sons DownloadService Level Agreement (SLA) Negotiation, Automation and Orchestration for Cloud Computing
This paper studies the SLA process, with focus on the Cloud computing as the basis to explain the concepts. The aim of this paper is to provide reader with an understanding of how SLA is being negotiated, orchestrated, and automated by service providers. In the subsequent section of this paper, the paper will discuss the challenges in the 3 process along with recommendations on how one can mitigate those challenges. The paper will also look into a case study from Microsoft Windows Azure Cloud System and identify the techniques that they have adopted in the area of SLA control.
348 days ago by National University of Singapore DownloadThe IBM Visibility. Control. Automation. Service Management Needs Assessment
IBM's Visibility. Control. Automation.ÃÂ Service Management Needs Assessment consists of two, short 15-question surveys. Choose the IT Organization survey to assess where you are today and how you can plan the next steps in your service management strategy and implementation. Or, opt for the Operations (EAM) survey to discover how you can maximize the performance and lifetime value of your assets, decrease costs and reduce risk.
Try it now!
Technical University of Catalonia whitepapers
Mechanism for Per-Class QoS Monitoring in IP/MPLS Transport Networks
This paper presents a study on the usage of MPLS as the technology for transport networks which have to be sensitive to IP Differentiated Services. Advantages of MPLS for implementing Traffic Engineering and the capabilities that lead it towards integration with IP-DiffServ are discussed. Several solutions for DS-TE MPLS are exposed. On the other hand, a mechanism for monitoring classes of service per node in DS-TE MPLS networks is presented.
416 days ago by Technical University of Catalonia DownloadEfficient Data Management Support for Virtualized Service Providers
Virtualization has been lately introduced for supporting and simplifying service providers' management with promising results. Nevertheless, using virtualization introduces also new challenges that must be considered. One of them relates with the data management in the provider. This paper proposes an innovative approach for performing efficiently all the data-related processes in a virtualized service provider, namely VM creation, VM migration and data stage-in/out. This solution provides a global repository where clients can upload the task input files and retrieve the output files. In addition, the provider implements a distributed file system (using NFS) in which each node can access its own local disk and the disk of the other nodes.
499 days ago by Technical University of Catalonia DownloadAchievable Bandwidth Estimation for Stations in Multi-Rate IEEE 802.11 WLAN Cells
This paper analyzes the effect of multi-rate transmissions in a CSMA wireless LAN environment. Observations in a real testbed showed that bandwidth resources (in Bytes/s) are shared fairly among all stations even though transmissions carried out at lower rates capture the medium for longer periods, which drastically reduces the overall throughput. The intrinsic concept of fairness in a CSMA scheme with multiple rates is quantified by means of a new formulation which is validated through simulations and practical measurements. The algorithm presented provides the maximum achievable bandwidth that can be offered to a given IEEE 802.11 station. Having this information has evident applications in real-time multimedia transmissions over WLANs.
640 days ago by Technical University of Catalonia DownloadMaximum Coverage at Minimum Cost for Multi-Domain IP/MPLS Networks
At present, service providers have several incentives to extend the reach of long-lived MPLS paths across domains. Providers, however, will face a number of trade-offs while choosing the optimal set of MPLS paths to be established. This paper focus on the multi-objective decision problem of maximizing the traffic demands to be covered by long-lived MPLS paths from a source domain S to its major destination domains, while minimizing the monetary costs incurred. The problem is formulated subject to a budget constraint, which assures the minimum expected revenue for the provider in S.
796 days ago by Technical University of Catalonia DownloadOn-Line Predictive Load Shedding for Network Monitoring
Building robust network monitoring applications is hard given the unpredictable nature of network tra?c. Complex analysis on streaming network data usually leads to overload situations when presented with anomalous tra?c, extreme tra?c mixes or highly variable rates. The paper presents an on-line predictive load shedding scheme for monitoring systems that quickly reacts to overload situations by gracefully degrading the accuracy of analysis methods. The main novelty of the approach is that it does not require any knowledge of the monitoring applications. This way the paper preserves a high degree of flexibility, increasing the potential uses of these systems. The paper implemented the scheme in an existing network monitoring system and deployed it in a research ISP network.
891 days ago by Technical University of Catalonia DownloadBlind and Semiblind Spatio-Temporal Diversity for OFDM Systems
Adaptive antenna arrays can be used to improve the performance of Orthogonal Frequency Division Multiplexing systems. They are usually applied in the frequency domain, after the FFT demodulation. In this paper, the selected algorithms are applied in time domain. A blind method is firstly proposed for the maximization of the temporal Signal to Noise plus Interference Ratio (SNIR) in frequency selective channels exploiting the temporal redundancy introduced by the Cyclic Prefix (CP). This algorithm may cope well with non-stationary interference that appears during the burst transmission. This blind technique is extended so as to take advantage of the preamble that precedes the useful data in the HIPERLAN/2 (HL/2) specification.
1071 days ago by Technical University of Catalonia Download
