Re: "Predictive" caching

Miguel A.L. Paraz <map@iphil.net> wrote:
> Next, I'm thinking of something - I wonder what your thoughts on it are.
> It's something like "predictive caching", where you get objects in
advance
> in anticipation of your users getting it. How do you know? Consider the
> situation where your cache has a peer whose users have the same usage
patterns
> as yours. You log their ICP query MISSes and queue the objects up for
> fetching from your parent or the source, if they match certain criteria
(like
> if the extensions are cachable, like gif, jpg, html).
>
> While this may increase the number of hits, the number of bytes
downloaded
> also increases. However this is OK if the fetches are done during
off-peak
> hours, or, there's a lot of bandwidth available but it's on a
high-latency
> link like a satellite.

This is what SkyCache does. The main problem is that you apparently need
to have either a truly huge userbase, or a truly homogenous userbase to
make it work well enough to overcome the false positives.

Later,
scott
Received on Tue Dec 07 1999 - 09:53:10 MST