Re: Outline Inter Cache Communication

From: Alex Rousskov (rousskov@nlanr.net)
Date: Fri Nov 13 1998 - 10:56:55 MST


On Fri, 13 Nov 1998, Ingrid Melve wrote:

> Inter Cache Communication Protocols
> /Work in progress, content not to be trusted, comments welcome/

Hi Ingrid,

        Just a few corrections/clarifications on Cache Digests. Feel free to
edit them to suite your unique style.

> Cache Digest
>
> Cache Digest allows proxies to make information about their cache
> content available to peers in a compact format.

Cache Digest allows proxies to make information about their cache content
available to peers in a compact format. Digests eliminate ``Do you have it?''
ICP-like queries and delays associated with those queries.
    
A peer uses digests to identify co-operating caches that are likely to have a
given web object. [32]

> Cache Digest is not a protocol, but a compression technique for
> exchanging information about proxy cache content.

Cache Digests is [at least] two protocols. The first protocol or standard
specifies how to build and interpret a digest. The second protocol defines
how to request a digest from a proxy, what digests a proxy may have, etc. (in
other words, it defines the digest exchange procedure).

There are demand-driven plans to move both protocols from semi-documented
stage to Internet Draft stage.

Thank you,

Alex.



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