Failed Delta RPMs increased 10.7 MB of updates to 15.9 MB -

[Bob Goodwin]

This is the first time I've observed this happening, delta rpm did the
opposite of what I expected, dunno if I have a problem in this system or
if it is in the data received? I thought it interesting if nothing else ...

......................
Is this ok [y/N]: y
Downloading Packages:
(1/8): greybird-gtk2-theme-3.22.4-1.fc26_3.22.5-1.fc26.noar 8.8 kB/s |  11
(2/8): greybird-gtk3-theme-3.22.4-1.fc26_3.22.5-1.fc26.noar  17 kB/s |  21
(3/8): greybird-xfce4-notifyd-theme-3.22.4-1.fc26_3.22.5-1. 4.4 kB/s | 8.7
[DRPM 1/7] greybird-gtk2-theme-3.22.4-1.fc26_3.22.5-1.fc26.noarch.drpm: don
[DRPM 2/7] greybird-gtk3-theme-3.22.4-1.fc26_3.22.5-1.fc26.noarch.drpm: don
(4/8): greybird-xfwm4-theme-3.22.4-1.fc26_3.22.5-1.fc26.noa  54 kB/s |  49
[DRPM 3/7] greybird-xfce4-notifyd-theme-3.22.4-1.fc26_3.22.5-1.fc26.noarch.
(5/8): libsolv-0.6.29-1.fc26_0.6.29-2.fc26.x86_64.drpm       30 kB/s |  43
[DRPM 4/7] greybird-xfwm4-theme-3.22.4-1.fc26_3.22.5-1.fc26.noarch.drpm: do
(6/8): mpg123-libs-1.23.8-5.fc26_1.25.6-1.fc26.x86_64.drpm   88 kB/s |  87
[DRPM 5/7] libsolv-0.6.29-1.fc26_0.6.29-2.fc26.x86_64.drpm: done
(7/8): selinux-policy-3.13.1-260.9.fc26.noarch.rpm          274 kB/s | 506
(8/8): selinux-policy-targeted-3.13.1-260.8.fc26_3.13.1-260 1.1 MB/s | 5.8
[DRPM 6/7] mpg123-libs-1.23.8-5.fc26_1.25.6-1.fc26.x86_64.drpm: done
/var/lib/selinux/targeted/active/policy.kern: read error
(tried to read 8192 bytes from offset 3871320)
cannot reconstruct rpm from disk files
Some packages were not downloaded. Retrying.
selinux-policy-targeted-3.13.1-260.9.fc26.noarch.rpm        1.2 MB/s | 9.4
---------------------------------------------------------------------------
Total                                                       894 kB/s |  16
Failed Delta RPMs increased 10.7 MB of updates to 15.9 MB (-48.1% wasted)

.......................

The size of the update is small and at this time of day it does not
matter but it just caught my eye ...

Bob

--
Bob Goodwin - Zuni, Virginia, USA
http://www.qrz.com/db/W2BOD
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[Andy Blanchard]

Post by Bob Goodwin
This is the first time I've observed this happening, delta rpm did the
opposite of what I expected, dunno if I have a problem in this system or if
it is in the data received? I thought it interesting if nothing else ...

Noticed that too. I've not dug into the cause - my guess would be
that the "policy.kern" file was different to that expected by the DRPM
for whatever reason - but the file size failure is easy enough to
explain. There is not a significant size reduction between the DRPM
and the full RPM, so having downloaded the DRPM and failed to create
the RPM, DNF then downloaded the RPM as well, effectively doubling the
size of the download. Combined with the other files in the update,
that's pushed the total amount of data downloaded in DRPMs + RPM to
more than the total of the full RPMs.

Regards,
Andy
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[Bob Goodwin]

Post by Andy Blanchard

Post by Bob Goodwin
This is the first time I've observed this happening, delta rpm did the
opposite of what I expected, dunno if I have a problem in this system or if
it is in the data received? I thought it interesting if nothing else ...

Noticed that too. I've not dug into the cause - my guess would be
that the "policy.kern" file was different to that expected by the DRPM
for whatever reason - but the file size failure is easy enough to
explain. There is not a significant size reduction between the DRPM
and the full RPM, so having downloaded the DRPM and failed to create
the RPM, DNF then downloaded the RPM as well, effectively doubling the
size of the download. Combined with the other files in the update,
that's pushed the total amount of data downloaded in DRPMs + RPM to
more than the total of the full RPMs.
Regards,
Andy

.
Yes, increasing the data by roughly 50%. "Delta RPMs increased 10.7 MB
of updates to 15.9 MB (-48.1% wasted)"

Since you saw it too, I will assume it is not a problem in my system,
and will watch for any recurrence.

Thanks for responding.

Bob


--
Bob Goodwin - Zuni, Virginia, USA
http://www.qrz.com/db/W2BOD
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