Exploitation of event-semantics for distributed publish/subscribe systems in massively multiuser virtual environments

Fischer, Thomas; Daum, Michael; Irmert, Florian; Neumann, Christoph; Lenz, Richard

doi:10.1145/1866480.1866494

Cited by 4 publications

(3 citation statements)

References 16 publications

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“…These event types include the movement of characters, information about entity collisions, textual chat used by the players to communicate with each other, or messages used to disseminate coordination information. For an extensive overview in event semantics in MMOGs we refer to [11].…”

Section: Exemplary Event Typesmentioning

confidence: 99%

Automated quality-of-service-aware configuration of publish-subscribe systems at design-time

Fischer

Wahl

Lenz

2014

Proceedings of the 8th ACM International Conference on Distributed Event-Based Systems

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Configurable publish-subscribe middleware provides efficient support for the diverse Quality-of-Service (QoS) requirements of large-scale distributed applications. However, choosing the optimal middleware configuration to suit a specific application primarily remains a manual task within the responsibility of application developers. Existing configurable middleware approaches either do not allow extensive configuration or lack the possibility to specify QoS requirements in a domain-specific terminology. In this paper we present a novel methodology for the QoS-aware configuration of publish-subscribe middleware, which relies on discrete-event simulations and supervised learning techniques to automatically translate declarative descriptions of the application domain to an optimal configuration. The configuration is conducted at design-time to minimize possible run-time impacts. We implemented a design-time configurable middleware and evaluated the quality of the automated configuration workflow as well as the performance of event dissemination. Our results show that simulation experiments in conjunction with regression methods can be used to reliably derive optimal middleware configurations without further user interaction. We clarify that extensive design-time configurability does not compromise run-time performance and suits the requirements of demanding applications.

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Section: Exemplary Event Typesmentioning

confidence: 99%

Automated quality-of-service-aware configuration of publish-subscribe systems at design-time

Fischer

Wahl

Lenz

2014

Proceedings of the 8th ACM International Conference on Distributed Event-Based Systems

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“…These types are selected because they both have fundamentally different semantics and QoS requirements [4].…”

Section: Demonstrationmentioning

confidence: 99%

Automated publish-subscribe middleware configuration with M2etis

Wahl

Fischer

Lenz

2014

Proceedings of the 8th ACM International Conference on Distributed Event-Based Systems

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We present Massive Multiuser Event Infrastructure (M 2 etis), a configurable publish-subscribe middleware. M 2 etis uses discrete-event simulations and regression methods to translate declarative descriptions of event types in terms of the application domain to an optimal configuration. Configuration decisions are based on the Quality-ofService (QoS) requirements of the application and are conducted by a configuration component at design-time to minimize performance impacts at run-time.The demonstration shows how the M 2 etis configuration workflow can be applied to the application domain of Massively Multiplayer Online Games (MMOGs). We explain the configuration workflow as conducted by the M 2 etis configuration component and illustrate how it can be integrated into the development lifecycle of distributed applications.

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“…an avatar's properties and position in a persistent game world, players expect high consistency and availability. A performance suitable to fulfill the real-time constraints of a computer game is a further necessary requirement to grant a continuous game experience [21,26,13,8].…”

Section: Introductionmentioning

confidence: 99%

Achieving Consistent Storage for Scalable MMORPG Environments

Diao

Zhao

Schallehn

et al. 2014

Proceedings of the 19th International Database Engineering &Amp; Applications Symposium on - IDEAS '15

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As outlined for instance by the CAP theorem, achieving consistency guarantees within a 100% available and faulttolerant distributed system is impossible. Nevertheless, in real-life applications actual properties are neither black nor white and the degree of fulfilment of requirements depends on the likelihood of failures and communication parameters of distributed systems. While typical Cloud-based applications weaken consistency in accordance with less strict applications requirements, strong consistency can also be achieved, for instance by tunable consistency. This, however, often comes with a strong degradation of scalability (performance of growing clusters) and availability. Based on a project investigating the usefulness of Cloud DBMS for Massively Multi-player Online Role-Playing Games (MMORPGs) we describe how strong consistency can be provided for such a scenario, by still proving a high-level of availability and performance suitable for this specific application. For this purpose we implement a lightweight mechanism to detect failures based on timestamps and only react accordingly if required.

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Exploitation of event-semantics for distributed publish/subscribe systems in massively multiuser virtual environments

Cited by 4 publications

References 16 publications

Automated quality-of-service-aware configuration of publish-subscribe systems at design-time

Automated quality-of-service-aware configuration of publish-subscribe systems at design-time

Automated publish-subscribe middleware configuration with M2etis

Achieving Consistent Storage for Scalable MMORPG Environments

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