Hey Presto!

[drago01]

On Sat, Jun 12, 2010 at 5:24 PM, Christopher Brown
<snecklifter at gmail.com> wrote:
> You don't seem to be working all that good!
>
> I'm sure I'm not the only one seeing this. In particular:
>
> Transaction Summary
> ================================================================================
> Install       1 Package(s)
> Upgrade      85 Package(s)
>
> Total download size: 207 M
> Is this ok [y/N]: y
> Downloading Packages:
> Setting up and reading Presto delta metadata
> updates/prestodelta                                      |  17 kB     00:00
> Processing delta metadata
> Download delta size: 2.1 M
> (1/10): ModemManager-0.3-9.git20100409.fc12_0.3-13.git20 | 126 kB     00:00
> (2/10): NetworkManager-0.8.0-6.git20100408.fc12_0.8.1-0. | 510 kB     00:00
> (3/10): NetworkManager-glib-0.8.0-6.git20100408.fc12_0.8 | 106 kB     00:00
> (4/10): NetworkManager-gnome-0.8.0-6.git20100408.fc12_0. | 301 kB     00:00
> (5/10): NetworkManager-pptp-0.7.997-3.git20100120.fc12_0 |  47 kB     00:00
> (6/10): NetworkManager-vpnc-0.7.996-4.git20090921.fc12_0 |  56 kB     00:00
> (7/10): gstreamer-plugins-bad-free-0.10.18-1.fc12_0.10.1 | 339 kB     00:00
> (8/10): gstreamer-plugins-good-0.10.22-1.fc12_0.10.23-1. | 427 kB     00:00
> (9/10): libmtp-1.0.2-1.fc12_1.0.3-2.fc12.x86_64.drpm     |  33 kB     00:00
> (10/10): wpa_supplicant-0.6.8-8.fc12_0.6.8-9.fc12.x86_64 | 191 kB     00:00
> Finishing rebuild of rpms, from deltarpms
> <delta rebuild>                                          | 4.5 MB     00:03
> Presto reduced the update size by 54% (from 4.5 M to 2.1 M).
> Package(s) data still to download: 202 M
>
>
>
> ...which includes the most recent openoffice.org update - a prime
> candidate for drpm goodness.
>
> Am I missing something obvious?

We don't generate deltas for packages with a size of >= 100MB ....
which kind of makes it useless for this case but it seems that delta
generation is to expensive to do for such large packages on the re-eng
boxes.