A dynamic reconfiguration service for CORBA

Bidan, Christophe; Issarny, Valérie; Saridakis, Titos; Zarras, Apostolos

doi:10.1109/cds.1998.675756

Cited by 63 publications

(37 citation statements)

References 10 publications

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“…Bidan et al [2] describe a dynamic reconfiguration service for CORBA. Application consistency during a reconfiguration is preserved by maintaining the integrity of remote procedure calls (RPC).…”

Section: Related Workmentioning

confidence: 99%

ReDAC -- Dynamic Reconfiguration of Distributed Component-Based Applications with Cyclic Dependencies

Rasche

Poize

2008

2008 11th IEEE International Symposium on Object and Component-Oriented Real-Time Distributed Computing (ISORC)

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This paper introduces ReDAC, a new algorithm for dynamic reconfiguration of multi-threaded applications with cyclic dependencies. In order to achieve high reliability and availability, distributed component software has to support dynamic reconfiguration. Typical examples include the application of hot-fixes to deal with security vulnerabilities. ReDAC can be implemented on top of the modern component-platforms Java and .NET. We extend the statical term component, denoting a unit of deployment, to runtime by defining a capsule (runtime component instance) to be a set of interconnected objects. This allows us to apply dynamic updates at the level of components during runtime without stopping whole applications. Using system-wide unique identifiers for threads (logical thread IDs), we can detect and also bring capsules into a reconfigurable state by selectively blocking threads, relying on data structures maintained by additional logic integrated into the capsules using aspect-oriented programming. An important contribution of this paper is that ReDAC supports the dynamic reconfiguration of distributed multi-threaded and re-entrant applications with cyclic call graphs.

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Section: Related Workmentioning

confidence: 99%

ReDAC -- Dynamic Reconfiguration of Distributed Component-Based Applications with Cyclic Dependencies

Rasche

Poize

2008

2008 11th IEEE International Symposium on Object and Component-Oriented Real-Time Distributed Computing (ISORC)

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“…Similarly, no independent business will accept to register its online service in a group that realizes active replication, while knowing that this will involve devoting precious resources to the group without any actual benefit (many reservations made by the same customer to each of the active replicas, while only one of them will be validated at the end of the protocol that realizes the reservation process through the active replication group). Similarly, in the field of dynamic reconfiguration of conventional distributed systems, several approaches tackled the issue of substituting an entity for another prefabricated backup entity Goudarzi & Kramer, 1996;Minsky et al, 1996;Bidan et al, 1998;Blair et al, 2000;Poladian et al, 2004). As previously discussed, the problem of service substitution is far more complex.…”

Section: Introductionmentioning

confidence: 99%

“…Conventional approaches assume that RS is described at an abstract level in terms of components and connectors. Based on that, they deal with the reconfiguration of RS in terms of adding, removing and substituting components Goudarzi & Kramer, 1996;Minsky et al, 1996;Bidan et al, 1998;, and connectors Kon et al;.…”

Section: Background and Related Work Backgroundmentioning

confidence: 99%

“…This preparation concerns components affected by the intended reconfiguration and may take several forms. For example, request blocking Goudarzi & Kramer, 1996;Bidan et al, 1998), request redirection or request queuing may be enforced on components that interact with a component that must be substituted. In Phase 4, RM determines the contribution of CE to the new configuration.…”

Section: Background and Related Work Backgroundmentioning

confidence: 99%

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Dynamic Maintenance of Service Orchestrations

Fredj

Zarras

Georgantas

et al.

Service Intelligence and Service Science

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Service-oriented architectures evolved rapidly as the solution to the latest requirements for loosely-coupled distributed computing. Into this broad context several approaches emerged towards the discovery and the systematic composition/orchestration of services. One of the next challenges in this field is the maintenance of service-oriented architectures towards accomplishing the ultimate goal of constructing eternal service-oriented systems out of looselycoupled basic engineering elements. The particular problem we deal with in this paper is the dynamic maintenance of service orchestrations in the presence of unavailable services. Specifically, we focus on the dynamic substitution of stateful services that become unavailable during the execution of service orchestrations. As an answer to this problem, we propose the SIROCO middleware platform which is further detailed along with an experimental evaluation of our first prototype. Our findings show that SIROCO provides the necessary means for achieving dynamic maintenance with a reasonable expense on the execution of service orchestrations.

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“…In recent years, support for different QoS (quality-of-service) mechanisms, including dynamic reconfiguration, load-balancing and replication mechanisms, has been added to middleware infrastructures [4,16,17]. This results in a shift in the complexity required to satisfy QoS constraints from the application to the supporting infrastructure.…”

Section: Introductionmentioning

confidence: 99%