Flavio Bertini, Universit¨¤ "La Sapienza" - Roma: Adapter-Logic Application at
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This document discusses distributed systems and group communication. It introduces JGroups, an open source toolkit for reliable group communication. It then summarizes Adapter-Logic Application (A.L.A.), a JGroups-based integration framework that allows for heterogeneous system integration. A.L.A. uses JGroups features like clustering and high availability to operate in both active-active and active-passive modes for scalability and fault tolerance.
Flavio Bertini, Universit¨¤ "La Sapienza" - Roma: Adapter-Logic Application at
- 1. Distributed Systems Seminars Adapter-Logic Application: a JGroups based integration framework for heterogeneous environments Flavio Bertini
- 2. Roadmap 1) Introduction to group communication 2) Group communication issues 3) The JGroups solution 4) A case study: Adapter-Logic Application ? Why introduce an adapter? ? How A.L.A. works ? Operational modes ? The clustering subsystem ? How JGroups helped A.L.A. 5) Other application areas of JGroups 2
- 3. Group communication Every Distributed Systems need to communicate through a reliable layer. All nodes cooperating for a unique target may have the necessity to rely on a complex communication architecture to merge/compare data (e.g. SETI@home, Clustering, etc.) 3
- 4. Group Communication issues The most common problems in group communication are: ? Keep consistence between replicas ? Prevent data corruptions ? Ensure a message is delivered to recipients ? many more... 4
- 5. Group Communication issues The most common problems in group communication are: ? Keep consistence between replicas ? Prevent data corruptions ? Ensure a message is delivered to recipients ? many more... 5
- 6. Group Communication issues The most common problems in group communication are: ? Keep consistence between replicas ? Prevent data corruptions ? Ensure a message is delivered to recipients ? many more... 6
- 7. The JGroups solution JGroups is a multi platform toolkit for a reliable group communication 7
- 8. The JGroups solution JGroups is a multi platform toolkit for a reliable group communication 8
- 9. A case study: Adapter-Logic Application A.L.A. is: ? a JGroups success story ? an integration framework (adapter) for heterogeneous environments and architectures. ? a solution to integrate legacy systems in SOA flows 9
- 10. A case study: Adapter-Logic Application A.L.A. is: ? a JGroups success story ? an integration framework (adapter) for heterogeneous environments and architectures. ? a solution to integrate legacy systems in SOA flows Only one platform to manage several architectures! 10
- 11. Why introduce an adapter? Overcome the barriers due to the lack of a common language between heterogeneous systems 11
- 12. How A.L.A. works A.L.A. works through a very scalable plugins system called Controllers and Connectors 12
- 13. How A.L.A. works A.L.A. works through a very scalable plugins system called Controllers and Connectors 13
- 14. A.L.A. operational modes Two operational modes: ? Active/Active hot standby sparing: two or more A.L.A. instances run in parallel. ¡ú High Availability and Load Balancing ? Active/Passive cold standby sparing: two or more A.L.A. instances but only one is running. 14
- 15. High Availability and Load Balancing Active/Active: 15
- 17. The Clustering subsystem (internals) A single point of failure 17
- 18. The Clustering subsystem (internals) The fault tolerant adapter model 18
- 19. The Activation Queue 19
- 20. The Activation Queue 20
- 21. The Activation Queue The Activation Queue is reorganized 21
- 22. How JGroups helped A.L.A. The Cluster events propagate through the 22 Network thanks to the JGroups API
- 23. Another JGroups utilization example JBoss Clustering modular stack 23
- 24. All A.L.A. related images are property of Sunnyvale. I wish to thank Denis Maggiorotto, 24 who is the CEO and founder. All rights reserved.