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Studying of Directed Epidemic Algorithms Used to Ensure the Reliability of Publish/Subscribe Systems

دراسة خوارزميات نشر العدوى الموجّهة المُستَخدَمة لتأمين الوثوقية في أنظمة النشر/الاشتراك

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 Publication date 2015
and research's language is العربية
 Created by Shamra Editor




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Publish/Subscribe Systems become increasingly important, mainly because they provide a full decoupling between the publishers and the subscribers, with respect to space, time, and synchronization. This research presents an overview of publish/subscribe systems and epidemic algorithms (especially the directed ones), and studies the performance of directed epidemic algorithms used to ensure the reliability of publish/subscribe systems. Adopting Scribe system and simulation using OMNET++, the paper evaluates different directed epidemic algorithms by considering many factors: targeted range width, number of rounds, number of nodes, and packet loss rate, on each of: the reliability, overhead, and mean latency.


Artificial intelligence review:
Research summary
تناول البحث أهمية أنظمة النشر/الاشتراك (Publish/Subscribe Systems) التي تتيح فك الارتباط بين الناشرين والمشتركين من حيث المكان والزمان والتزامن. يركز البحث على خوارزميات نشر العدوى، وخاصة الموجهة منها، لضمان الوثوقية في هذه الأنظمة. تم استخدام نظام Scribe والمحاكاة باستخدام برنامج OMNET++ لدراسة أداء عدة خوارزميات لنشر العدوى الموجهة، مع مراعاة تأثير عوامل مثل عرض مجال الاستهداف، عدد الدورات، عدد العقد، ومعدل فقد الرزمة على الوثوقية، الحمل الزائد، والتأخير الوسطي. أظهرت النتائج أن خوارزمية 3PG هي الأفضل من حيث نسبة التسليم، بينما كانت خوارزميات Loss Polar وCut Polar الأفضل من حيث التأخير الوسطي. وأوصى البحث باستخدام خوارزمية 3PG في التطبيقات التي تتطلب وثوقية عالية، وخوارزميات Loss Polar وCut Polar في التطبيقات التي تتطلب تأخيرًا زمنيًا منخفضًا.
Critical review
دراسة نقدية: يعتبر البحث ذو أهمية كبيرة في مجال أنظمة النشر/الاشتراك، حيث يقدم تحليلًا شاملًا لأداء خوارزميات نشر العدوى الموجهة. ومع ذلك، يمكن أن يكون هناك بعض النقاط التي تحتاج إلى تحسين. أولاً، كان من الممكن تضمين المزيد من التفاصيل حول كيفية تأثير كل عامل من العوامل المدروسة على الأداء بشكل فردي، بدلاً من التركيز على التأثير المشترك للعوامل. ثانيًا، قد يكون من المفيد إجراء تجارب إضافية على أنظمة نشر/اشتراك أخرى غير Scribe لتأكيد النتائج. أخيرًا، يمكن أن تكون هناك حاجة لمزيد من الدراسات حول كيفية تحسين الخوارزميات المقترحة لتقليل الحمل الزائد بشكل أكبر.
Questions related to the research
  1. ما هي العوامل التي تم دراستها في البحث لتقييم أداء خوارزميات نشر العدوى الموجهة؟

    تم دراسة تأثير عرض مجال الاستهداف، عدد الدورات، عدد العقد، ومعدل فقد الرزمة على الوثوقية، الحمل الزائد، والتأخير الوسطي.

  2. ما هي الخوارزمية التي أظهرت أفضل أداء من حيث نسبة التسليم؟

    خوارزمية 3PG أظهرت أفضل أداء من حيث نسبة التسليم.

  3. ما هي الخوارزميات التي كانت الأفضل من حيث التأخير الوسطي؟

    خوارزميات Loss Polar وCut Polar كانت الأفضل من حيث التأخير الوسطي.

  4. ما هي التوصيات التي قدمها البحث بناءً على النتائج؟

    أوصى البحث باستخدام خوارزمية 3PG في التطبيقات التي تتطلب وثوقية عالية، وخوارزميات Loss Polar وCut Polar في التطبيقات التي تتطلب تأخيرًا زمنيًا منخفضًا.


References used
COSTA, P; MIGLIAVACCA, M.; PICCO, G. P; and CUGOLA, G. Introducing reliability in content-based publish subscribe through epidemic algorithms. In DEBS ’03: Proceedings of the 2nd international workshop on Distributed event-based systems, pages 1–8, New York, NY, USA, 2003. ACM
COULOURIS, G; DOLLIMORE, J; KINDBERG, T; and BLAIR, G. DISTRIBUTED SYSTEMS Concepts and Design. Fifth Edition, Addison Wesley,2011, ISBN 0-13-214301-1
ESPOSITO, C. A tutorial on reliability in publish/subscribe services. Proceedings of the 6th ACM International Conference on Distributed Event-Based Systems - DEBS ’12, pages 399-406, 2012
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