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

Abstract

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.

Towards prioritized event matching in a content-based publish/subscribe system

“…Providing QoS support in pub/sub systems has been widely studied [2,4,9,12,14,19,27,32]. The Java Message Service (JMS) provides a way to deliver expedited messages ahead of normal messages, defining a ten level priority value with 0 as the lowest priority and 9 as the highest [14].…”

“…In [32], constraint-based routing was proposed to take into account the subscribers' QoS requirements, the dynamic characteristics of overlay network (such as latency and bandwidth) and events quality in the process of routing, besides the subscription information. In [12], a novel methodology is presented for the configuration of pub/sub systems that support developers with selecting the QoSoptimal configuration, addressing the problem of choosing an optimal configuration for pub/sub systems.…”

“…A common solution is to provide guaranteed service for subscribers with high QoS requirements. Therefore, providing QoS support is critical for contentbased pub/sub systems to realize guaranteed delivery of events, attracting researchers great attention [2,4,9,12,19,27,32].…”

Automated publish-subscribe middleware configuration with M2etis

“…Further implementation details of the middleware composition are described in Section 4. For a detailed explanation of the configuration workflow for MAESTRO, we refer to our previous work [3,6].…”