Get Architecting Dependable Systems II PDF

By Rogério de Lemos, Cristina Gacek, Alexander Romanovsky

ISBN-10: 3540231684

ISBN-13: 9783540231684

ISBN-10: 3540259392

ISBN-13: 9783540259398

As software program structures develop into ubiquitous, the problems of dependability develop into increasingly more severe. on condition that strategies to those concerns needs to be taken into consideration from the very starting of the layout procedure, it's applicable that dependability is addressed on the architectural point. This book results from an attempt to assemble the study groups of software program architectures and dependability. encouraged by means of the ICSE 2003 Workshop on software program Architectures for in charge platforms, the ebook makes a speciality of subject matters correct to bettering the cutting-edge in architecting accountable platforms. The 15 completely reviewed papers originate partially from the workshop; others have been solicited so that it will in achieving whole assurance of all suitable features. The papers are prepared into topical sections on architectures for dependability, fault-tolerance in software program architectures, dependability research in software program architectures, and business event.

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Extra resources for Architecting Dependable Systems II

Example text

Figure 2 shows this scenario. Note, the displayed monitor and lease periods, which influence the achievable degree of availability. Fig. 2. Scenario of a node failure In the case of failures in the responsible monitor as well as in the monitored service, the responsibility lease of the monitor expires and another monitor takes over the supervising responsibility. This monitor replaces the failed monitor, and starts supervising the currently unmonitored service which includes starting new instances when needed.

Further we will use the term service groups for one group of identical application services. e. one service instance is sufficient for performing the required function (1-out-of-3 redundancy). The timed behavior of the model is determined by the above described dependability parameters. In Figure 4 the model of our example scenario is shown in form of a generalized stochastic Petri net. All architecture parameters (times and quantities), which have been described in the previous section, are used in this architectural model of a group of identical application services.

In: Object Technologies for Advanced Software. de Abstract. Many human activities today depend critically on systems where substantial functionality has been realized using complex software. Therefore, appropriate means to achieve a sufficient degree for dependability are required, which use the available information about the software components and the system architecture. For the special case of service-based architectures, we identify in this paper a set of architectural principles which can be used to improve dependability.

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Architecting Dependable Systems II by Rogério de Lemos, Cristina Gacek, Alexander Romanovsky

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