On Improving the Performance of Reliable Server Pooling Systems for Distance-Sensitive Distributed Applications

Second International Conference on the Digital Society

2008

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In order to provide a generic, applicationindependent and resource-efficient framework for server redundancy and session failover, the IETF RSerPool WG is currently standardizing the Reliable Server Pooling (RSerPool) framework. Server redundancy has to take load distribution and load balancing into consideration since these issues are crucial for the system performance.There has already been some research on the server selection strategies of RSerPool for different application scenarios. In particular, it has been shown that the adaptive Least Used selection usually provides the best performance. This strategy requires up-to-date load information of the services, which has to be propagated among distributed pool management components. But network delay (which is realistic for systems being widely distributed to achieve availability in case of regional servers failures) as well as caching of information may both lead to obsolete load information. Therefore, the purpose of this paper is to analyse and evaluate the performance of a new server selection rule to cope with update latencies. Especially, we will also analyse the impact of different workload parameters on the performance of the new server selection strategy.

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Section: Discussionmentioning

confidence: 99%

Section: Using the Handle Resolution Cachementioning

confidence: 99%

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A New Server Selection Strategy for Reliable Server Pooling in Widely Distributed Environments

Second International Conference on the Digital Society

2008

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“…embedded systems like telecommunications equipment or routers). Nevertheless, PEs may be distributed globally for their service to survive localized disasters [15].…”

Section: Components and Protocolsmentioning

confidence: 99%

“…Instead, the most probable attack scenario is an attacker being able to compromise a PE or PU. These components are significantly more numerous [10] and may be distributed over multiple, less controllable locations [15]. For that reason, ASAP-based attacks are in the focus of our study.…”

Section: Introductionmentioning

confidence: 99%

On Robustness and Countermeasures of Reliable Server Pooling Systems Against Denial of Service Attacks

NETWORKING 2008 Ad Hoc and Sensor Networks, Wireless Networks, Next Generation Internet

2008

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Abstract. The Reliable Server Pooling (RSerPool) architecture is the IETF's novel approach to standardize a light-weight protocol framework for server redundancy and session failover. It combines ideas from different research areas into a single, resource-efficient and unified architecture. While there have already been a number of contributions on the performance of RSerPool for its main tasks -pool management, load distribution and failover handling -the robustness of the protocol framework has not yet been evaluated against intentional attacks.The first goal of this paper is to provide a robustness analysis. In particular, we would like to outline the attack bandwidth necessary for a significant impact on the service. Furthermore, we present and evaluate our countermeasure approach to significantly reduce the impact of attacks.

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Improving the Load Balancing Performance of Reliable Server Pooling in Heterogeneous Capacity Environments

Sustainable Internet