Hi,

i wrote:
>   https://cdimage.debian.org/mirror/cdimage/archive/11.10.0/amd64/jigdo-16G/
> Whatever, there is no counterpart for this image in
>   https://cdimage.debian.org/mirror/cdimage/archive/11.10.0/source/
> This shortcomming might be worth complaining at the debian-cd mailing
> list

It comes to me that there is probably no 1:1 relation between the
volumes of a binary ISO set and the volumes of the volumes of the
source set for the same medium type. That would be because the different
size of source and binary packages and because the source sets cover
all architectures together.

  https://cdimage.debian.org/mirror/cdimage/archive/11.10.0/amd64/jigdo-dvd/
offers 19 binary ISOs.
  https://cdimage.debian.org/mirror/cdimage/archive/11.10.0/source/jigdo-dvd/
offers only 18 source ISOs.

So the lack of a "16 GB" source ISO can be justified by the fact, that
"16 GB" does not constitute a full binary set and thus is not a candidate
for a source set, which has to be a full set in any case.


> I guess that the source ISO for the next larger binary ISO contains all
> the source packages of the 16 GB ISO:

Although this guess might still be correct, above considerations open
enough room for the contrary to let me state that only a complete
source set guarantees that you got all source packages from which a
particular binary ISO was made.

The most compact source set is
  https://cdimage.debian.org/mirror/cdimage/archive/11.10.0/source/jigdo-dlbd/
which offers two volumes.
But due to the latency bottleneck of Jigdo download maybe you get served
faster if you download simultaneously a set with smaller volumes, so
that your jigdo-lite processes form a larger crowd at the Debian mirror
server.


Have a nice day :)

Thomas

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