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Application-level multicast on structured overlays often suffer several drawbacks: 1) The regularity of the architecture makes it difficult to adapt to topology changes; 2) the uniformity of the protocol generally does not consider node heterogeneity. It would be ideal to combine the scalability of these overlays with the flexibility of an unstructured topology. In this paper, we propose a locality-aware...
Dynamic provisioning is a useful technique for handling the virtualized multi-tier applications in cloud environment. Understanding the performance of virtualized multi-tier applications is crucial for efficient cloud infrastructure management. In this paper, we present a novel dynamic provisioning technique for a cluster-based virtualized multi-tier application that employ a flexible hybrid queueing...
In this paper, a task scheduling algorithm in process engine is proposed to not only maximize overall customer satisfaction but also guarantee QoS requirement. This new algorithm dynamically assigns priority to a task based on the weighted utility value considering the predicted business value and left time to execute the process instance the task belongs to. The business value of each kind of process...
Along with the improvement of cloud technologies, we envision that thousands of web applications whether owned by individuals or enterprises will be migrated into cloud. These web applications share the cloud resources while require different quality of service guarantees and management policies. It is challenging while with abundant innovation opportunities given the easy and dynamic provisioning...
SIP flow management should respect the specific characteristics of SIP protocol applied in multimedia or telecom services for meeting stringent quality of service (QoS) requirement. The specific characteristics include explicit session structure for correlating a series of SIP messages, stringent response time required by real-time applications, extra overhead imposed by SIP message retransmission,...
In this paper, we study how to build a front-end flow management system for SIP application servers. This is challenging because of some special characteristics of SIP and SIP applications. (1) SIP flows are well organized into sessions. The session structure should be respected when managing SIP flows. (2) SIP has been adopted by telecom industry, whose applications have more critical QoS requirements...
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