Passive Replication Schemes in Aqua
نویسندگان
چکیده
Building large-scale distributed object-oriented systems that provide multidimensional Quality of Service (QoS) in terms of fault tolerance, scalability, and performance is challenging. In order to meet this challenge, we need an architecture that can ensure that applications’ requirements can be met while providing reusable technologies and software solutions. This paper describes techniques, based on the AQuA architecture, that enhance the applications’ dependability and scalability by introducing two types of group members and a novel passive replication scheme. In addition, we describe how to make the management structure itself dependable by using the passive replication scheme. Finally, we provide performance measurements for the passive replication scheme.
منابع مشابه
AQuA: An Adaptive Architecture that Provides Dependable Distributed Objects
Building dependable distributed systems from commercial off-the-shelf components is of growing practical importance. For both cost and production reasons, there is interest in approaches and architectures that facilitate building such systems. The AQuA architecture is one such approach; its goal is to provide adaptive fault tolerance to CORBA applications by replicating objects. The AQuA archit...
متن کامل3 GATEWAY For Application A Connection Group A : B Connection Group A : B Naming Service PASSIVE Replication Handler
The goal of the AQuA architecture is to provide adaptive fault tolerance to distributed applications by using commercial off-the-shelf hardware and operating systems. The AQuA architecture allows application programmers to request desired levels of dependability during applications’ runtimes. It also provides adaptive fault tolerance. In distributed systems, resources change dynamically, and di...
متن کاملAqua: a Framework for Providing Adaptive Fault Tolerance to Distributed Applications By
Dependable distributed systems are diÆcult to build. This is particularly true if they have dependability requirements that change during the execution of an application and are built with commercial o -the-shelf hardware. In that case, fault tolerance can be achieved using middleware, and mechanisms must be provided to communicate the dependability requirements of a distributed application to ...
متن کاملConsistency of Partitionable Object Groups in a CORBA Framework
The Eternal system provides a novel methodology for the consistent replication of objects in an adaptive, faulttolerant, CORBA-compliant distributed system that is susceptible to partitioning. Passive and active replication schemes are supported in Eternal, and mechanisms are provided for the interaction of objects with different replication schemes. Nested operations for both passive and activ...
متن کاملBuilding Dependable Distributed Objects with the AQuA Architecture 1
Providing fault tolerance to distributed applications is an important problem. The flexibility that software can offer makes it a natural choice for implementing a significant portion of the fault tolerance of dependable distributed systems. Furthermore, when the dependability requirements change during the execution of an application, the fault tolerance approach must be adaptive in the sense ...
متن کامل