perfsonar development work

[Mario Reale <>]

Hi Andreas,

I have the following spread comments on your document ( version 0.6 of 
May 14) :


1. Motivate a  bit more the background and underlying perspective for 
this doc/proposal : what's the main reason to introduce this new 
"finding related MPs/MAs functionality" ?
You have sketched it a bit - stating that this is to understand if 
current MA/MP can be of help -  but one should describe the scale of the 
proposed solution, I think. Quantify a bit more .....I discussed a bit 
with colleagues and I realized it's a bit unclear the underlying 
philosophy :
Suppose  we want to investigate a file transfer between a PC situated at 
the fourth floor of the University of Hanover and a PC at the third 
floor in the University of Perugia. ( supposing  we have a well-defined 
IP path).
How many  domains do we currently cross ? How many hops ? Among these 
domains and hops, how many are currently supposed to be included within 
the gathered information by pS, in its current deployment status ?

The issue I mean is : I thought this functionality somehow relates to 
scalability, and to increase the fine graining of the perfSONAR 
monitoring, possibly introducing more MPs and more MAs in the involved path
investigation...possibly trying to embed the domain endpoints in the 
game ( like adding an MP/MA inside the Hanover university, one in  
Perugia....,
and not only on the backbone of our nets)  - do you also share this 
view or not ?
Nn both cases, may be some comments on this line could be added - 
specifying the context and the scale for this 
functionality....quantifying which fraction of the hops are currently 
monitored in an average
e-Science e2e path within Europe.......(supposing this can be defined)

2. In the work flow proposal section , at some stage you mention "LS to 
check for interesting locations along the path" : what is considered 
interesting here may be could be better described. a bit more into detail ?



I also have many general remarks on the syntax/phrasing/form of the 
text, can I send it to you separately ?


Talk to you in the phone in a while
ciao
Mario



--


Mario Reale
Consortium GARR
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