Re: how hint caching works

On Wednesday 21 November 2001 11.23, Roger Venning wrote:

> Firstly a thought from left field: which would be easier, updating
> pushcache to HEAD or modifying the design assumptions of cache-digests?

The design issues of cache-digests are not trivial to fix. A lot of effort
has already been put on that path without reaching anything satisfactory
enought to even begin implementation..

The way disests works quite well randomizes the information, making
incremental digests a relative costly operation. Also, due to the relatively
high level of information overlap it is very hard to delete information from
a digest without considerably degrading the over all quality of the digest
over some time.

This combined with the fact that the interesting cache information has a
relatively short "best before" date makes the digest approach not that
optimal.

Regards
Henrik
Received on Wed Nov 21 2001 - 12:21:11 MST