Re: partial Debian mirroring - Was: dpkg rewrite in Java

[Goswin von Brederlow <brederlo@informatik.uni-tuebingen.de>]

Chris Halls <halls@debian.org> writes:

> On Thu, 2004-04-29 at 10:25, Andreas Rottmann wrote:
>> I have switched to V2 some time ago, and there are two things I don't
>> like about it:
>> 
>> - Big memory footprint, especially when downloading big
>>   packages. There seems to be a correlation between the size of the
>>   package and the memory consumed by apt-proxy, which is really bad
>>   for things like OOo.
>
> Yes, I noticed this when reading the fetching code recently; it needs to
> be improved not to keep the streamed file in memory before writing it
> out.

You know how big the file is and you have to write it anyway.

So, why not create a sparse file and mmap it?

[If the downloads stops half way for some reason you have to trunc the
file to the downloaded size.]

>> - Generally high CPU consumption
>
> I've been sent details of how to use apt-proxy with python-psyco, which
> works like a JIT compiler to reduce CPU usage (at a cost of more memory
> overhead); I'll try and get this in the next version or so.
>
> Thanks,
> Chris

MfG
        Goswin