Regarding these two questions: Are there any concerns about such change? >> I believe that >90% users wouldn't notice anything as it's related to the >> history database only. > >
> On Wed, Jul 18, 2018 at 10:01 AM Igor Gnatenko < > ignatenkobr...@fedoraproject.org> wrote: > Since we've changed the database entirely, what's the point of keeping > same algorithm for calculating checksum? On Wed, Jul 18, 2018 at 9:34 AM Daniel P. Berrangé <berra...@redhat.com> > wrote: > What's the benefit in changing to be compatible with YUM as opposed > to stickin with current alogorithm ? > > Surely if we don't change it, even fewer users will notice that DNF's > behaviour is different from YUM's, since DNF has been the default for > many releases now. > > I could understand the motiviation to stay compatible with YUM if we > were only just about to switch Fedora from YUM to DNF, but time is > way in the past now. Shouldn't we optimize for the fact that DNF is > the more widely deployed & used tool, and thus not worry about > YUM compatibility in respect of the history DB ? It is true that going forward in the Fedora world it matters less. It is more of an impact for yum-3 compatibility as yum4/dnf is being considered in the RHEL7/CentOS7 userspace environments as described at https://blog.centos.org/2018/04/yum4-dnf-for-centos-7-updates/ Currently yum version 3 and what the proof-of-concept project is calling yum4 work very well together side by side. Users can safely switch back and forth. The major problem is yum/dnf histories being different and the rpmdb checksum difference is a blocker for resolving the history compatibility. So think of this as an effort to bring package management parity between Fedora, RHEL 7, & CentOS7, as the latter two still have a long life ahead of them. Hope that helps, Terry
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