On Tue, Aug 28, 2018 at 04:22:56PM +0200, tomas@tuxteam.de wrote:
On Tue, Aug 28, 2018 at 10:16:06AM -0400, Michael Stone wrote:On Tue, Aug 28, 2018 at 02:03:05PM +0100, Mark Rousell wrote: >Isn't this true of, say, HTTP too? Not in the same way, because you have a sender and a receiver, without the potentially infinite number of other machines that might be getting a copy of the content just in case someone might want it someday.To be fair, this only applies to the brave (pre CDN) old world :)
No, it applies just as much to CDNs--even more so. The CDN nodes have senders and receivers and a financial interest in ensuring a good cache rate based both on on-demand caching and predictive caching utilizing their knowledge of both. The old usenet machines had to retrieve anything that might be needed because they didn't know if a client might want it, and they didn't know if they could simply get it from the same server later.
Mike Stone