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COMP28112 Distributed Computing Lecture 18 Summary

Recap of key topics covered in COMP28112 Distributed Computing lecture 18. Topics include scalability, parallel computing, architectures, RPC/RMI, naming services, fault tolerance, lab exercises, and exam information. Emphasizing concepts like flexibility, trade-offs, constraints, and skill requirements in distributed systems.

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COMP28112 Distributed Computing Lecture 18 Summary

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  1. COMP28112Distributed Computing It’s been three months since the first lecture… We went a long way… We covered a number of topics… Let’s see some… Marking session for the lab on May 5th & 8th All your lab work should be marked by May 8th! COMP28112 Lecture 18

  2. Back in January I said (lecture 1) • Be flexible, keep an open mind, etc... • We’re doing engineering : • not an exact science... • but, basic exact science skills are essential (e.g., how long will it take to transmit a message of size 4MB over a network link with speed 256KB/sec?) • constraints, optimisations, ... • unreasonable (or infinite) demands, ... • imperfections, trade-offs, ... Distributed Systems typically encompass a number of such trade-offs! COMP28112 Lecture 18

  3. Mesa et al, “Scalability of Macroblock-level Parallelism for H.264 Decoding” COMP28112 Lecture 18

  4. Then… • 2: Parallel Computing, Amdahl’s law… • 3: Architectures, client-server, etc… • 4-7: RPC/RMI, intro to lab exercise 2 • 8: Name and Directory Servers • 9: Lamport/Vector Clocks • 10: Election of a leader (coordinator) • 11-12: Transactions COMP28112 Lecture 18

  5. … (cont) • 13: Byzantine Fault Tolerance • 14: Lab 3 – simulation and modelling • 15: Replication • 16: The Integration Game • 17: Some interesting problems (and more) • + two guest lectures COMP28112 Lecture 18

  6. and we could have said more on: • Security • Distributed File Systems • Distributed Shared Memory • Peer-to-Peer Systems • Mobile Computing • Web Services • Sensor-based applications • Energy minimization • Cloud Computing • Performance • …

  7. …above all, we tried to examine a way of thinking that allows us to design and build ‘good’ distributed systems! COMP28112 Lecture 18

  8. for more information…the recommended textbooks have a range of pointers COMP28112 Lecture 18

  9. Towards the exam… • This is the 9th year of COMP28112 (COMP20032 earlier) • Past exams are available from the University’s central repository • This module’s webpage: http://studentnet.cs.manchester.ac.uk/ugt/COMP28112/ • Lecture handouts are all there! (plus hardcopies outside the Resource Centre) • When looking for the module’s page please make sure that you don’t see last year’s web page! COMP28112 Lecture 18

  10. The exam • Four questions: • You must answer Question 1 • You choose any two from Questions 2, 3, 4 • Check past papers for style COMP28112 Lecture 18 All lab marking should be completed by May 8th

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