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RISS 인기검색어
- 검색키워드
- 저자 : Thomas Dreibholz (검색결과 2 건)
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An Evaluation of the Pool Maintenance Overhead in Reliable Server Pooling Systems
Thomas Dreibholz,Erwin P. Rathgeb 보안공학연구지원센터 2008 International Journal of Hybrid Information Techno Vol.1 No.2
Currently, the IETF RSerPool WG is standardizing a generic protocol framework for server redundancy and session failover: Reliable Server Pooling (RSerPool). An important property of RSerPool is its lightweight architecture: server pool and session management can be realized with small CPU power and memory requirements. That is, RSerPool-based services can also be managed and provided by embedded systems. Up to now, there has already been some research on the performance of the data structures managing server pools. But a generic, application-independent performance analysis – in particular also including measurements in real system setups – is still missing. The aim of this article is therefore – after giving an outline of the RSerPool framework, an introduction to the pool management procedures and a description of our pool management approach – to first provide a detailed performance evaluation of the pool management structures themselves. Afterwards, the performance of a prototype implementation is analysed in order to evaluate its applicability in a real network setup.
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A Scalable QoS Device for Broadband Access to Multimedia Services
Wenyu Zhu,Thomas Dreibholz,Erwin P. Rathgeb 보안공학연구지원센터 2009 International Journal of Multimedia and Ubiquitous Vol.4 No.2
Nowadays, an increasing number of users get high-speed broadband access to the Internet. These broadband connections make new multimedia applications possible. However, such applications also introduce new Quality of Service (QoS) requirements to the network. Particularly, they require an assured bandwidth even in the case of network overload. The network itself has to provide such bandwidth assurances. This article introduces our concept of a novel network QoS device being located in network edge nodes. It provides a solution for relaxed QoS guarantees to certain flows on a congested link by focussing packet discard on selected flows. However, unlike for IntServ solutions like RSVP, our approach only requires minimal signalling and therefore provides both efficiency and scalability. We furthermore provide a quantitative performance evaluation of our QoS device by using simulations.
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