OOTI Talks 30-11-2005 17-Nov-18 Johan J. Lukkien, j.j.lukkien@tue.nl TU/e Informatica, System Architecture and Networking

To the presenters Opinion? Comfortable? Achieved what you wanted? 17-Nov-18 Johan J. Lukkien, j.j.lukkien@tue.nl TU/e Informatica, System Architecture and Networking

Questions DCOM limitation to windows essential? Where does it come from? Distributed objects from the title? When is it usefui, for us? Why is CORBA not very popular? what is needed for some RMI system to get popular? DCOM: where is it used? Suppose I need it, is it simple? Which class of problems is solved? What is the DCE meaning in the DCOM? GLOBE: which performance measures are decreased? 17-Nov-18 Johan J. Lukkien, j.j.lukkien@tue.nl TU/e Informatica, System Architecture and Networking

Advice presentation goals? If you can’t define something, seek for: defining properties goals (what is it for) Make a diagram with all the files included, make a diagram of the running system, explain the tasks you must do step by step note: the extra time in the presentation is easily countered by not having confusion UML interaction diagrams are an effective way to explain interactions Can refer to book: DCOM/CORBA is instance of an RMI-based system .... refer then to a sample diagram and map concepts, e.g. binding, invocation Effective use of time? Involve your adience 17-Nov-18 Johan J. Lukkien, j.j.lukkien@tue.nl TU/e Informatica, System Architecture and Networking

Comment If was clear what the CORBA system was; however, the relation between some (smaller) elements like IOR and a corresponding problem was unclear A significant number of concepts were not explained in advance; concepts have a reason name space, naming etc. Could have explained everything around a single example 17-Nov-18 Johan J. Lukkien, j.j.lukkien@tue.nl TU/e Informatica, System Architecture and Networking

Questions What is the goal of the presentation? What are you going to learn us? What is a DHT? What would be the alternative to flooding? breadth-first search, depth-first search 17-Nov-18 Johan J. Lukkien, j.j.lukkien@tue.nl TU/e Informatica, System Architecture and Networking

Advice Take a goal (e.g. distributed object store) and explain the workings System picture, relation with underlying Internet Explain concepts/issues in this domain overlay topology (representation, establishment), free riding, incentive to share, multi-source file transfer, search, addressing, location hiding, naming ..... 17-Nov-18 Johan J. Lukkien, j.j.lukkien@tue.nl TU/e Informatica, System Architecture and Networking

Comments After a P2P afternoon do we understand enough now to see what the applications problems solutions are? 17-Nov-18 Johan J. Lukkien, j.j.lukkien@tue.nl TU/e Informatica, System Architecture and Networking