North American Network Operators Group

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Re: Transparent Caching Solutions - Information Wanted

  • From: Dirk Harms-Merbitz
  • Date: Wed Feb 04 14:17:41 1998

In our case it was a company that creates webpages. Their default
home pages was their own server. Also they must be demoing/doing
quality control their own site quite a bit.

Hmm. Targeted marketing...


On Wed, Feb 04, 1998 at 08:30:22AM -0800, Paul A Vixie wrote:
> several folks have sent replies to me personally which may be of general
> interest:
> > Hit rates are user population dependent. We have seen hit rates
> > as high as 30% from a single T1 connected customer (with a population
> > of less then 500 people).
> so have we.  but that was a computer club with its own POP and they were
> mostly sharing interesting (i.e., pornographic) URL's over an IRC back
> channel.
> we've got ~80 transparent caching units out in the field, and most of them
> are in "normal" modem pools where the users don't know each other and the
> communitities of interest have broader splay.
> > ... in some special cases you really can predict what would best be in the
> > cache beforehand.  You then win from a speed standpoint (pre fetched data
> > is served up faster).
> yes, that's true -- in some special cases you can exercise prescience and
> if you can then the hit rate goes up by a lot as does the downstream data
> rate.
> however, to make this work you have to continuously feed the primary caches
> new prescient data (or prescient metadata by which prescient data can be
> fetched).  interest factor is in other words dynamic and shortlived.