Re: Aw: Fwd: Update-Accelerator 3.0

[Michael Tremer <michael.tremer@ipfire.org>]

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On Wed, 2013-03-06 at 22:23 +0100, Bernhard Bitsch wrote:

> I don't think we should make a new solution based on squid's caching,
> too.
> 
> The existing Update Accelerator is written as a rewriter module to
> squid.
> 
> This model is strong enough to realize the function " caching of
> frequent  file requests ".

When we jump right ahead to discuss technical details, I would like
someone to check out if we can easily control the cache to store our
files, so that we don't have to manage our own one.


> My first idea for a redesign of the accelerator was generalize the
> conditions for caching.
> 
> In the moment all conditions can be described by the pattern
> 
>   if URI match set of (sample URI's and RE'S)_1  & URI !match  set of
> (sample URIs and RE's)_2 then
> 
>     check(URI)
> 
>   fi
> 
> 
> 
> This can be enhanced if the sets of URI's and RE's are condensed to
> two regular expressions for each caching class, actually called
> "vendor".
> 
> Then the check for caching is just a loop over all classes.
> 
> A second enhancement can be achieved if the most requested checks are
> made first. The loop terminates by the first match.

The latest version of PCRE comes with a fast JIT compiler for regular
expressions. We should take advantage of that instead of running thrugh
loops.

I agree that all URLs should be configurable.

-Michael