Transparency in Distributed Operating Systems

1. Transparency in Distributed Operating Systems Sig Freund CSC 8320 Fall 2008 rfreund1@student.gsu.edu

2. Transparency in Distributed Operating Systems Evolution of Modern Operating Systems Centralized operating system +network access and resource sharing Network operating system +transparency Distributed operating system

3. Transparency in Distributed Operating Systems Distributed Operating System Integrating system components and resources into what appears to the user as a single local system

4. Transparency in Distributed Operating Systems Goal of Transparency Hide all irrelevant system-dependent details from the user and system programmer and create the illusion of a simple and easy to use system

5. Transparency in Distributed Operating Systems Make system simple and effective Conflicting goals requires trade-offs

6. Transparency in Distributed Operating Systems Access Transparency

7. Transparency in Distributed Operating Systems Location Transparency

8. Transparency in Distributed Operating Systems Migration Transparency

9. Transparency in Distributed Operating Systems Concurrency Transparency

10. Transparency in Distributed Operating Systems Replication Transparency

11. Transparency in Distributed Operating Systems Parallelism Transparency

12. Transparency in Distributed Operating Systems Failure Transparency

13. Transparency in Distributed Operating Systems Performance Transparency

14. Transparency in Distributed Operating Systems Size Transparency

15. Transparency in Distributed Operating Systems Revision Transparency

16. Transparency in Distributed Operating Systems System Goals – Efficiency Concurrency Parallelism Performance

17. Transparency in Distributed Operating Systems System Goals – Flexibility Access Location Migration Size Revision

18. Transparency in Distributed Operating Systems System Goals – Consistency Access Replication Performance

19. Transparency in Distributed Operating Systems System Goals – Robustness Failure Replication Size Revision

20. Transparency in Distributed Operating Systems Interaction and Control Transparency Communication Synchronization Distributed algorithms

21. Transparency in Distributed Operating Systems Performance Transparency Process scheduling Deadlock handling Load balancing

22. Transparency in Distributed Operating Systems Resource Transparency Resource scheduling File sharing Concurrency control

23. Transparency in Distributed Operating Systems Failure Transparency Failure handling Configuration Redundancy

24. Transparency in Distributed Operating Systems • IRIS: Infrastructure for Resilient Internet Systems • Based on distributed hash tables (DHTs), that will enable a new generation of large-scale distributed applications. DHTs are robust in the face of failures, attacks and unexpectedly high loads. They are scalable, achieving large system sizes without incurring undue overhead. They are self-configuring, automatically incorporating new nodes without manual intervention or oversight. They provide a simple and flexible interface and are simultaneously usable by many applications.

25. Transparency in Distributed Operating Systems • E1 is a distributed operating system project, based on the following concepts: • object replication • component model support • persistence

26. Transparency in Distributed Operating Systems • References • [1]A. S. Tanenbaum, “Distributed Operating Systems”,Prentice Hall, pp.22-25. • [2]R. Chow,T. Johnson, “Distributed Operating Systems & Algorithms”, Addison Weley, pp.29-32. • [3]J. Wein, “Parallel & Distributed Systems” • [4]B. Karp, “RPC & Transparency”,UCL Computer Science,2006

27. Transparency in Distributed Operating Systems • References (continued) • [5] Parallel and Distributed Operating System Group, MIT http://project-iris.net/ • [6] IRIS: Infrastructure for Resilient Internet Systems http://project-iris.net/

28. Questions?