On Fri, Feb 04, 2011 at 09:47:21AM -0200, Fernando Lemos wrote: > On Fri, Feb 4, 2011 at 6:57 AM, Stanislav Maslovski > <stanislav.maslov...@gmail.com> wrote: > [...] > >> If you want to have that level of control, why don't you just check it > >> manually? Use --download-only with apt-get (no dpkg locking this way) > >> and when it's done, use apt-get without it to install the packages after > >> making sure that there is no dpkg active anymore. > > > > This is possible, however, it is an extra busy work for a user. In any > > case, I think that holding a lock only for downloading is an overkill > > and this can be relaxed. > > As far as I can tell (and please correct me if I'm wrong), when you > do, say, an "apt-get upgrade", apt prepares an upgrade "plan" that > uses a given set of packages. If apt wouldn't lock and parallel to > that you do an "apt-get install", for example, the original "plan" > might not be valid anymore (e.g., new "Breaks" or "Conflicts" were > introduced).
This I understand, as I mentioned in my original mail. > So a new plan would have to be created, the user would > have to be asked for confirmation again. Doesn't sound that great. Actually, it is the opposite. It sounds actually very great _for_the_target_user_. Because the user who wants this feature will be aware of what he is doing. For that user the _current_ situation with the global lock does not seem very great. Other users will not be affected at all if such a check is indroduced, because they do not use dpkg when doing an apt-get upgrade. Unfortunately, I do not know anything about the internal architecture of apt and friends, therefore I cannot promise any help with it and may only ask for other people that may be interested in implementing this. Maybe in a competing software (was there something called cupt?) > > As Julian Taylor mentioned, there is also another side of the same > > problem: aptitude itself can be improved so that it is able to > > download and unpack in parallel. If it were doing this then the lock > > would be justified. > > As far as I know, apt-get already downloads in parallel. Not sure > about aptitude. A parallel download is not the same as a download superimposed with unpacking. -- Stanislav -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20110204160931.GA13423@kaiba.homelan
