1. Scalability and Fault- Tolerance in an Event Rule Framework for Distributed Systems Hillary Caituiro-Monge Research Assistant, Graduate Student. Center for Computing Research and Develop. Dept. of Electrical and Computer Engineering University of Puerto Rico, Mayaguez Campus. PO Box 5215. Mayaguez, P.R. 00681-5215. Tel. (939) 642 5374 Email. Hillary.Caituiro@ece.uprm.edu Url: http://amadeus.uprm.edu/~hillary

2. CONTENTS JUSTIFICATION EVENT CHANNEL RUBIES OBJETIVES BIBLIOGRAPHY

3. EVENTS RULES EVENTS (a) (b)

4. HOST EVENTS EVENT CHANNEL CASE CLIENT EVENTS CLIENT EVENTS CLIENT EVENTS RUBIES EVENT CHANNEL CLIENT

5. EVENT CHANNEL: DESIGN ISSUES ABSENCE NO SCALABLE NO FAUL-TOLERANT

6. EVENT CHANNEL: SCENARIOS MANY RUBIES: EC SLOW MANY CLIENTS: EC SLOW RUBIES CRASH: EC CRASH CLIENT CRASH: EC CRASH

7. EVENT CHANNEL: SOLUTION MANY RUBIES: REPLICATE EV MANY CLIENTS: REPLICATE EV RUBIES CRASH: REPLICATE RUBIES CLIENT CRASH: SUPPORT TO REPLICATE CLIENT

8. RUBIES CASE (a) (b) (c) (d)

9. RUBIES: DESIGN ISSUES ABSENCE NO SCALABLE NO FAUL-TOLERANT

10. RUBIES: SCENARIOS MANY RULES: RUBIES SLOW SERVICE CRASH: RUBIES CRASH

11. RUBIES: SOLUTION MANY RULES: ASIGN RULES TO RUBIES DISTRIBUTE RULES OVER DISTRIBUTED RUBIES SERVICE CRASH: SUPPORT TO REPLICATED SERVICE

12. RUBIES EVENT CHANNEL HOST RULES DB SERVICE RUBIES EVENT CHANNEL SERVICE RULES DB RULES DB

13. RUBIES RULES DB RUBIES RULES DB Distribute Rules over RUBIES. RULES DB RUBIES

14. RUBIES GROUP RUBIES Replication RUBIES GROUP RUBIES DOMAIN RUBIES GROUP RUBIES REPLICATED RUBIES DOMAIN

15. Service Replication package aaa; Rule eip1 On GageLevelReport grl1 Use alertService If (glr1.level >= 0.75) Then alertService.triggerAlarm End; package aaa; Rule eip1 On GageLevelReport grl1 Use alertService If (glr1.level >= 0.75) Then alertService.triggerAlarm End;

16. ORB / RMI / …..

17. OBJETIVES Enhanced ERF capabilities to allow Fault- Tolerant. Replicate RUBIES and Rules Replicate Event Channel Enhanced ERF capabilities to allow Scalability. Enhanced RUBIES to select over different distributed replicated services. These services are declared in clause use. Distribute Rules over a group of RUBIES.

18. DISTRIBUTION DIMENSION REPLICATION DIMENSION

19. PROCEDURE (1/2) Enhanced ERF capabilities to allow Fault-Tolerant using the following strategy: Study fault-tolerant CORBA standard specifications given by OMG. Choice a fault-tolerant appropriate strategy. Re-design ERF architecture within fault-tolerance approach. Implements and modify new aspects. Perform several tests. Enhanced ERF capabilities to allow Scalability using the following strategy: Study several scalability methods. Choice an appropriate scalable method strategy. Re-design ERF architecture within scalable approach. Implements and modify new aspects. Perform several tests.

20. PROCEDURE (2/2) Do Scalability analysis Comparison between ERF implementation without scalability support and ERF with scalability support. Do Fault-Tolerance analysis Comparison between ERF implementation without fault-tolerance support and ERF with fault-tolerance support. Write the thesis report

21. BIBLIOGRAPHY (1/3) [Arroyo00a] Arroyo-Figueroa, Javier A., Moulier, E., “A Rule-Based Intelligent Service (RUBIES)”, 2000. [Arroyo00b] Arroyo-Figueroa, Javier A., Borges, José A., Rodríguez, N., Cuaresma-Zevallos, A., Moulier-Santiago, E., Rivas-Aviles, M., Yeckle-Sánchez, J., “An Event/Rule Framework for Specifying the Behavior of Distributed Systems”, 2000. [Arroyo-Figueroa02] Arroyo-Figueroa, Javier A., Borges, José A., Rodríguez, N., Cuaresma-Zevallos, A., Moulier-Santiago, E., Rivas- Aviles, M., Yeckle-Sánchez, J., “An Event Rule Framework (ERF) for CORBA”, 2002. [Collet00] Collet, C., “The NODS Project: Networked Open Database Services”, In Proc. Of the 14th European Conference on Object- Oriented Programming (ECOOP 2000)-Symposium on Objects and Databases, Cannes, France, June 2000. http://www- lsr.imag.fr/Les.Groupes/storm/NODS/index.html.

22. BIBLIOGRAPHY (2/3) [Tanenbaum95] Tanenbaum, A.S., “Distributed Operating Systems”, Prentice-Hall, 1995. [Eternal-Systems00] Eternal-Systems Inc, Tutorial on Fault Tolerant CORBA, 2000. [Gokhale00a] Gokhale, A.,, Natarajan, B., Schmidt, Douglas C., Yajnik, S., “Applying Patterns to Improve the Performance of Fault-Tolerant CORBA”, Proceedings of the 7th International Conference on High Performance Computing (HiPC 2000), ACM/IEEE, Bangalore, India, December 2000. [Gokhale00b] Gokhale, A.,, Natarajan, B., Schmidt, Douglas C., Yajnik, S., “DOORS: Towards High-performance Fault-Tolerant CORBA”, Proceedings of the 2nd International Symposium on Distributed Objects and Applications (DOA '00), OMG, Antwerp, Belgium, September 2000. [Moulier02] Moulier, E., “A Rule Based Intelligent Event Service (RUBIES)”, A thesis submitted in partial fulfillment of the requirements for the degree of Master in Sciences in Computer Engineering, 2002.

23. BIBLIOGRAPHY (3/3) [O’Ryan99] O’Ryan, C. Levine, D.L. Schmidt, D.C. Noseworthy, J.R. “Applying a scalable CORBA event service to large-scale distributed interactive simulations”, Proceedings of the fifth International Workshop on Objetc-Oriented Real-Time Dependable Systems, 1999. [OMG01] Object Management Group, “Fault Tolerant CORBA”, September 2001. [Su01] Su, S.Y.W. Lam, H. Minsoo Lee Bai, S. Zuo-Jun Shen., “An Information Infraestructura and e-services for supporting Internet- based scalable e-business enterprises”, Proceedings of the fifth IEEE International Enterprise Distributed Object Computing Conference, 2001. [Vargas-Solar01] Vargas-Solar, G., Collet C., Grazziotin-Ribeiro, H., “Open Active Services for Data-Intensive Distributed Applications”, 2001. [Youngjae01] Youngjae, K., Sungjune, H., Kiyong, P., Keecheon, Kim., Sunyoung, H., “Intelligent Fault-Tolerant CORBA Service on Real- Time CORBA”, 2001.

24. QUESTIONS? Write to mail and see my Home Page Email. Hillary.Caituiro@ece.uprm.edu Url: http://ece.uprm.edu/~s011015 END