Re: aptitude update and pdiff files

On 9/12/06, Owen Heisler <owenh000@xxxxxxxxx> wrote:
On Tue, 2006-09-12 at 10:12 -0400, celejar wrote:
> On 12 Sep 2006 14:56:11 +0200, Urs Thuermann <urs@xxxxxxxxxxxxxxxxx> wrote:
> > For a couple of month I have seen an annoying change in behavior of
> > aptitude update and apt-get update. Formerly, a couple of package
> > files where downloaded which took a few seconds. Now I normally see
> > that aptitude update downloads hundreds of files named like
> >
> > Get:282 2006-09-11-1318.15.pdiff [13.3kB]
> > Get:283 2006-09-11-1318.15.pdiff [13.3kB]
> > Get:284 2006-09-11-1318.15.pdiff [34.3kB]
> > Get:285 2006-09-11-1318.15.pdiff [34.3kB]
> > Get:286 2006-09-11-1318.15.pdiff [34.3kB]
> >
> > and this takes quite long. From the name I guess these are only
> > differences two package files so that less data have to be
> > transferred. However, the overhead of nearly 300 TCP connections
> > causes this to take *much* longer on some systems than simply
> > downloading the whole package file.
>
> I've been bitten by this also. They recently upgraded apt to download
> diffs instead of the entire package list each time. I suppose if one
> does apt-get update every day the new system is more efficient, but on
> my dialup system where I only update when I need to install something
> new, I have the same issue as you.

Perhaps for your dialup connection this is worse, but for one I have it
is better. I would much much rather download 10 files that are 30kB
each than the single package list that is 4MB. If only there weren't so
many pdiff files to download sometimes...

Well, that's exactly the problem. If one doesn't update daily, there
can be quite a few pdiffs to download.

Celejar


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