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2013, vol. 12, br. 45, str. 19-23
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Problem integracije visoko dostupnih kompleksnih distribuiranih softverskih sistema
An integration problem of highly available complex distributed software systems
Sažetak
Kompleksni računarski sistemi često obuhvataju kompleksnu koordinaciju između distribuiranih komponenti, koje su podložne otkazima i rekonfiguraciji u toku redovnog rada. Ovaj rad se bavi problemom nefunkcionisanja komunikacije između delova kompleksnog sistema, odnosno slučajevima kada trajanje komunikacije prevazilazi zadati vremenski okvir. Dato je jedno rešenje uvođenjem softverskog međusloja. U slučaju predugog trajanja komunikacije, ovaj međusloj omogućava aplikaciji da nastavi izvršavanje i reaguje na ovako nastalu grešku. Opisan je dizajn međusloja i na primeru je testirana funkcionalnost ovakvog pristupa. Analizom dobijenih rezultata je pokazano koje su granice ovakvog pristupa i u kojim pravcima je moguće tražiti poboljšanja.
Abstract
Complex computer systems often imply complex coordination of distributed components that are prone to failures and reconfiguration in the course of their regular operation. This paper describes a communication problem, when communication takes more time than allowed. One solution to the problem is given by introducing an additional middleware layer. In the case of communication timeout, this middleware allows the application to continue its operation and promptly react to this type of error. Middleware design is presented and in a test example functionality of this approach is tested. The analysis of the results shows the limits of this approach and the directions for further research.
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