RE: non-solutions for blogs.msdn.com: (was RSS consumes too much bandwidth)

["Bob Wyman" <bobwyman@xxxxxxxxxx>]

Michael Stillwell wrote:
> I'm coming to the conclusion that there's no easy way to send only
> (or mostly) unseen entries to clients.  Sending entries only once
> requires the concept of a something like a "stream",
	Then you are coming to false conclusions. Every day at PubSub.com,
"send only ... unseen entries to clients" is what we do all day long. We
filter over three million blogs in real-time continuously and send only
unseen entries to 10's of thousands of clients.

> something like a "stream", which can kinda be faked if there's no
> cache in the way, but putting a cache in the middle kills it
> because it doesn't understand streams.
	To make caching work with streams, what you need to do is expand
your ideas of what a cache is and how it works. PubSub.com can, for
instance, be viewed as a cache since it accomplishes precisely the same
function as a cache: It sits in between publishers and subscribers and
drastically reduces bandwidth requirements of the publishers while sharing
content among various clients. Certainly a "simple" cache can't handle
streams, however, a "stream cache" -- like PubSub.com -- *can* handle
streams since it is designed for precisely that problem.

		bob wyman