Johan J. Lukkien, [e-mail]

1
OOTI Talks

• 16-11-2006

2
To the presenters

• Opinion?
• Comfortable?
• Achieved what you wanted?

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?

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?

5
Advice

• Repeat, where you are in the presentation
• overview
• Focus on the message
• I learned your message is
• the high expectations / goals
• its complicated
• Get away from vagueness, go to concreteness
• examples
• one particular aspect, problem
• What about the audience?

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?

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?

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 whats the relation with
  Jini
• its just for the registration and lookup
• perhaps for eventing

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

10
Comments

• I dont 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