30-Jun-15 Johan J. Lukkien, TU/e Informatica, System Architecture and Networking 1 OOTI Talks

30-Jun-15 Johan J. Lukkien, TU/e Informatica, System Architecture and Networking 2 To the presenters Opinion? Comfortable? Achieved what you wanted?

30-Jun-15 Johan J. Lukkien, TU/e Informatica, System Architecture and Networking 3 Questions What is a grid? and how do I use it? Does the distinction between grid types lead to different technology/solutions? Grid-Web service relation –grid tech. is a collection of WS? –(note: SOAP is an encoding of RMIs – ‘machine independent’) What is the difference between distributed and parallel computing What is the relation between the requirements and the pictures shown –how does a user access a grid?

30-Jun-15 Johan J. Lukkien, TU/e Informatica, System Architecture and Networking 4 Questions The four functions –what is the relevance? –do they make up the data-grid? are these API-calls / models at a concrete service? –does the taxonomy represent design/configuration choices? what is the relation with the grid? –who implements this? it seems that it covers just about anything in distributed systems [in these domains] –is it worth-while (for your message....) to go through all the alternatives in the taxonomies?

30-Jun-15 Johan J. Lukkien, TU/e Informatica, System Architecture and Networking 5 Advice Repeat, where you are in the presentation –overview Focus on the message –I learned: your message is the high expectations / goals it’s complicated Get away from vagueness, go to concreteness –examples –one particular aspect, problem What about the audience?

30-Jun-15 Johan J. Lukkien, TU/e Informatica, System Architecture and Networking 6 Comment There is a high ‘holy grail’ aspect to grid Do you have questions or doubts yourself? –do you believe what you read & tell?

30-Jun-15 Johan J. Lukkien, TU/e Informatica, System Architecture and Networking 7 Questions Why do you want this distinction – processes & coordination? –what does it mean anyway? Which things can you do now that you could not do before? –or more efficiently? Is this related to grid? General CS question: why are we dreaming up all these concepts anyway?

30-Jun-15 Johan J. Lukkien, TU/e Informatica, System Architecture and Networking 8 Questions I think: Sun advertised Jini for this purpose after they invented it for another purpose Still- what is Jini? How to use it and what for? Is there a transaction concept in the lookup? –lookup & get perhaps Is the claim that The javaspaces story – what’s the relation with Jini –it’s just for the registration and lookup –perhaps for eventing

30-Jun-15 Johan J. Lukkien, TU/e Informatica, System Architecture and Networking 9 Advice Show the use / alternatives using an example Pay attention to a problem – solution relationship –particularly, when you –seem to– explain how something works –e.g.fault tolerance In the end, what can I do with it? which problems can be solved better? System diagram, with all actors, a typical interaction seqeunce

30-Jun-15 Johan J. Lukkien, TU/e Informatica, System Architecture and Networking 10 Comments I don’t find the audience very critical Both presentations referred to the concepts, and how they play a role –good –note that indeed most systems have paid attention to it –however, it really starts to become interesting once you understand the scope of the corresponding problem