perfsonar development work

[Guilherme Fernandes <>]

Loukik Kudarimoti wrote:

> Hi,
Hi

> While testing out RRD MA (from perfsonar 1.0) and SQL MA (snapshot), I 
> noticed that the response messages for a SetupDataRequest *without 
> key* message does not provide a key back along with measurement data 
> in the response. I remember that this wasn't the case some time ago.
>
> I support the idea of sending a key back for such requests. It allows 
> us to say "Here is the matching metadata and data for your request and 
> also, here is a key that you can use the next time you want data for 
> the same metadata".
>
> Based on my experience, I believe including the key in the response 
> requires a very minor change in the service engine code. All services 
> implementing the key mechanism should similarly provide the key back 
> for such requests.
>
> Any comments?
>
> Loukik.

But we also have the situation where the data in the response belongs to 
many keys (this is often the case when fetching OWAMP data from the SQL 
MA, like getting all the data that belongs from a src to a dst). You 
could return all the keys that are related, but I think you can't 
request data passing multiple keys (at least in the current 
implementation, but I could be wrong). Maybe it could return the key if 
its related with a single key and keep the current response if its 
related to multiple keys?

Guilherme Fernandes