RSSCloud Vs. PubSubHubbub: Why The Fat Pings Win. A PubSubHubbub advocate explains the differences between the two proposals: most importantly, PubSubHubbub includes the actual new content with the “fat ping” whereas RSSCloud just notifies you that you should poll the RSS feed, leading to a potential thundering herd. I’m still hoping one of those specs will detail a way in which they can be used for scalable regular WebHook-style notifications without any feed infrastructure at all.
Sign in with 
OpenID
Simon, thanks for the link! I'm not sure I understand what you mean by "scalable regular WebHook-style notifications without any feed infrastructure." Can you explain?
Josh Fraser - 13th September 2009 07:10 - #
Sure - I want to be able to send out massive numbers of HTTP POST "callbacks" from my applications without needing to solve the problem of sending so much traffic at scale. The PubSubHubbub protocol solves that by providing me with a "hub" server run by someone who cares about scaling it, but that currently requires an Atom feed of the underlying subscribable data. I'd like to be able to take advantage of this ability without needing to bother with the Atom feed at all.