On Wed, Apr 27, 2022 at 03:23:15PM +0100, majid hussain wrote: > hi sir Thomas, > > thank you for responding so promptly :) > may you have a great day :) > Majid Hussain > > On 27/04/2022 14:29, Thomas Schmitt wrote: > > Hi, > > > > majid hussain wrote: > > > was just curious, how are the debian dlbd images created? > > By a package named debian-cd: > > > > https://tracker.debian.org/pkg/debian-cd > > > > > > > and what percentage of the debian archive is used to gennerate them? > > You may estimate from the .jigdo files which describe them. > > > > gunzip <debian-11.3.0-amd64-DLBD-1.jigdo | less > > > > The total size of the ISO image and thus roughly of the included packages > > is given by line > > # Image size 48245475328 bytes > > I.e. 45 GiB. The number of packages listed is a bit higher than 29,000. > > > > In debian-11.3.0-amd64-DLBD-2.jigdo i see > > # Image size 35798159360 bytes > > 33 GiB and nearly 30,000 packages. > > I guess that few packages are excluded from the installation media. > > > > > > Have a nice day :) > > > > Thomas > >
So: the size for the first DVD, for example, is calculated to be 4.0GB and there's a script which puts as many packages as possible for a full system with graphics to fit size exactly 4GB. Thereafter, packages get assigned to DVD2, DVD3 etc. partly by popularity and partly by "what fits" as far as I understand it. Most people will never need more than the first 3 DVDs which is why we only supply the first three as downloadable images, and the rest as .jigdo files. This means that the size of the cdimages.debian.org mirror of media remains manageable now. dlbd - the same script from debian-cd makes the dlbd image. dlbd size allows you many DVDs: dlbd1 and dlbd2 together probably contain >90% of what any user would normally install at one time. Obviously - these are very large images - we don't store them on the mirrors for space reasons and only provide .jigdo files go generate them. Congratulations, however, you're the first person I've come across who actually gains benefit from the dlbd and has reported such: I'm pleased because it makes the effort of generating them and (potentially) testing them worthwhile because there is a real user out there who uses them. I don't think we bother generating them locally and testing the dlbd images with every point release so you may be one of the few people to ever report installing from these iamges. With every good wish, Andy Cater [Who works with Steve and Andy (and the other testers) of the Debian media/CD images team for every point release.] >
