perfsonar development work

[Yee-Ting Li <>]

Hi,

in order to better understand the architecture of perfSONAR, we have  
decided to create a MA for our IEPM-BW data. iepm-bw basically an end- 
to-end data monitoring suite. we have data stored all over the world  
in separate MySQL databases from which we would like to plug into  
perfSONAR.

We have separate tables for almost every kind of measurement; pings,  
traceroutes, iperfs, pathchirps etc etc. in order to better  
understand how i should implement the interface, i would appreciate  
it if you could answer some questions for me.

- i understand that there is a SQLStorageManager that already exists  
and uses the ibatis framework for easy SQL data retrieval. would it  
make more sense to write xml ibatis config files to query for our  
mysql data rather than implement our own MA in its entirety?

- correct me if i'm wrong; one uses a key to query for the relevant  
data, ie the examples have a ibatis config pointed to it in the  
request for data (which ibatis links to a table with bw data). if i  
were to implement a single MA for the IEPM-BW data, i'm guessing the  
client will need to discover which ibatis config would lead to each  
type of network metric (characteristic). clients can also query for  
keys, and or just ask for certain types of information (which the  
storagemanager would map to the relevant data source)

- how does the mapping for certain metrics work? how closely tied in  
with nmwg is this? ie if i request bandwidth information, are there  
any systems/code in place to basically map to say iperf information?  
is there a registration process for the types of metrics which an MA  
provides?

- there is a 'generic perl sql' implementation mentioned in the wiki;  
which basically describes how typically all that is required is a  
datestamp and value for a characteristic. how does the type of metric  
fit into this, and how is this supplied in the response? (kinda  
asking the same question as the previous question).

- is there a dynamic or static method of invocation of the  
StorageManager implementations? how do i add new StorageManagers to  
perfSONAR? how do i check to see if perfSONAR has a specific type of  
StorageManager invoked?

Thanks!

Yee.