Concurrency in Dependable Computing by Jonathan Burton, Maciej Koutny, Giuseppe Pappalardo, Marta

By Jonathan Burton, Maciej Koutny, Giuseppe Pappalardo, Marta Pietkiewicz-Koutny (auth.), Paul Ezhilchelvan, Alexander Romanovsky (eds.)

Concurrency in responsible Computing specializes in concurrency comparable concerns within the zone of responsible computing. disasters of method parts, be devices or software program modules, could be seen as bad occasions happening at the same time with a suite of ordinary process occasions. attaining dependability for this reason is heavily relating to, and likewise merits from, concurrency idea and formalisms. this helpful dating looks to happen into 3 strands of work.
program point structuring of concurrent actions. suggestions comparable to atomic activities, conversations, exception dealing with, view synchrony, etc., are invaluable in structuring concurrent actions as a way to facilitate makes an attempt at dealing with the consequences of part disasters.
Replication brought on concurrency administration. Replication is a ordinary process for reaching reliability. reproduction administration basically includes making sure that replicas understand concurrent occasions identically.
program of concurrency formalisms for dependability coverage. Fault-tolerant algorithms are more durable to ensure than their fault-free opposite numbers considering the impression of part faults at every one country must be thought of as well as legitimate country transitions. CSP, Petri nets, CCS are necessary instruments to specify and be certain fault-tolerant designs and protocols.
Concurrency in liable Computing explores many major concerns in all 3 strands. To this finish, it really is composed as a set of papers written by means of authors famous of their respective components of analysis. to make sure caliber, the papers are reviewed by way of a panel of at the very least 3 specialists within the correct area.

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Example text

TLA is a formalism suitable for describing state transition systems and their properties using a uniform notation. Hence being suitable to describe fault tolerance mechanisms. For example, the one described in this paper. This paper is organized as follow. Section 2 introduces the concept of dependable multiparty interaction. Section 3 presents the formalism used to describe the DMI properties. Section 4 shows the formal description of the DMI properties. Section 5 discusses the related work. Section 6 draws some conclusions.

It also allows the depetidability design to be reused for other systems which are expected to satisfy the same system model. Since it builds on more knowledge of the system than is assumed by approaches that essentially treat the system as a black-box, it offers the promise of lower-cost design of dependability. In particular, in the absence of faults, it allows the overhead of the dependability to be kept low, since essentially only the conformance to the model has to be checked. Moreover, in case the model evolves or is enriched, the dependability design may be modified accordingly.

E. exception handling. Exception handling in sequential programs is a well-known subject with several languages providing mechanisms for handling exceptions. Exception handling in parallel programs is much more complex than in sequential programs. Exceptional termination in a process can have a strong impact on other processes. For example, consider a set of processes that communicate with each other via a rendezvous mechanism. A process may terminate abruptly due to the presence of an exception.

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