[Nmc-wg] NMC Ma document review
zurawski at internet2.edu
Fri Jan 29 09:30:39 CST 2010
Hi Piotr & All;
> I have reviewed the document and have one question. Section 4 is
> DataInfo message type. As wiki says it is probably used only in pSPS. In
> geant perfsonar MA services (SQL MA nad RRD MA) don't use it and
> actually I don't know anything about this type of message. Could you
> tell me what is used for? And should we implement it in our services to
> be compatible with pSPS or it is not obligatory message type?
The message was implemented as a specific use case for a pSPS service,
it was discussed in a previous DICE meeting but at the time it was not
recommended for implementation everywhere. This message is similar to a
MetadataKeyRequest, but returns additional information inside of the
'key' element. See here (under 'Future Directions'):
I would not recommend implementing it since it breaks the primary rule
for the 'key' element of forcing a client to look inside and find
content (keys should be opaque).
The solution is not very clean, and I would prefer that we didn't even
bother to document this message because of this reason. We could 'fix'
the key issue but, this also means more time developing a protocol
(something I would prefer we didn't do at this time since we need to
make progress in documentation).
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