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

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

3. 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,
TU/e Informatica, System Architecture and Networking

4. 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,
TU/e Informatica, System Architecture and Networking

5. 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,
TU/e Informatica, System Architecture and Networking

6. 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,
TU/e Informatica, System Architecture and Networking

7. 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,
TU/e Informatica, System Architecture and Networking

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