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Re: Caching in Europe?

  • To: Dave.Morton@localhost
  • From: Mike Schwartz schwartz@localhost
  • Date: Fri, 30 Apr 1993 08:10:19 -0600
  • Cc: ripe@localhost
  • Resent-date: Fri, 30 Apr 93 16:12:58 +0200
  • Resent-from: Marten Terpstra <Marten.Terpstra@localhost
  • Resent-message-id: <9304301412.AA14141@localhost
  • Resent-sender: Marten.Terpstra@localhost
  • Resent-to: RIPE Discussion List ripe-list@localhost
> Date: Fri, 30 Apr 93 10:17:27 +0200
> From: Dave Morton <Dave.Morton@localhost
> To: ripe@localhost, schwartz@localhost
> Subject: Re:  Caching in Europe?
> 
> Mike,
> How would compare this to AFS for example ?

Dave,

AFS does whole file caching at each client, primarily to reduce file
server load.  In conrtrast, our study suggests placing caches within
the network to reduce duplicate transmissions across individual links.

AFS evolved from a system originally built to support easy access to
files from anywhere in a moderately large university community.  In
such an environment there isn't much widespread sharing - most files
are accessed by one or a handful of users working on a project
together, as opposed to thousands of sites retrieving the same popular
FTP files.  In our study we found that half of all FTP data by volume
crossing a particular network link were duplicate transmissions of
files that had previously traversed that link.
 - Mike
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