Re: Distribution CPG Protocol

[Alex French <afrench@vianetworks.com>]

At 03:22 PM 10/01/2001, Kobus van der Merwe wrote:
>I was thinking the order should be the other way around:
>1) handshake
>2) CPG advertise peer CDN capabilities (space, distribution methods supported)
>3) Content provider sends content advertisement
>4) CPG accepts or rejects
>etc

I don't know if CDN operators would want to advertise their total available 
space. In any case, this is likely to be governed by offline policy 
decisions, e.g. a contractual agreement that I will provide you with 3G per 
site for 10 sites. The protocol would need to know what the sites were 
before it could advertise the space available to them, which is similar to 
what I suggested.

>I.e. a content provider should decide how it wants its content to be
>served and choose a CDN with the appropriate capabilities then
>advertise to it.

I would agree with those who have suggested that a CDN is (more or less) a 
black box as viewed from other CDNs. QoS is too hard to negotiate 
online.Apart from space, what other parameters would you say govern how the 
content is served?


--
Alex French
Consultant, Technical Services                     E: afrench@vianetworks.com
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