Re: merged /usr considered harmful (was Re: Bits from the Technical Committee)
In this case, this page should be updated to reflect the fact it is not
broken.
https://wiki.debian.org/Teams/Dpkg/MergedUsr
Nol'
Le jeudi 15 juillet 2021 à 10:13 +0100, Luca Boccassi a écrit :
> On Wed, 2021-07-14 at 23:40 +0200, Guillem Jover wrote:
> > On Wed, 2021-07-14 at 19:54:56 +0000, Thorsten Glaser wrote:
> > > Sean Whitton dixit:
> > > > * #978636 move to merged-usr-only?
> > > >
> > > > We were asked to decide whether or not Debian 'bookworm'
> > > > should
> > > > continue to support systems which are not using the merged-usr
> > > > filesystem layout. We decided that support should not
> > > > continue beyond
> > > > Debian 'bullseye'.
> > >
> > > What? WHAT? ＷＨＡＴ？
> > >
> > > > The decision is captured here:
> > > > <https://bugs.debian.org/978636#178>
> > >
> > > No reason provided either. This stinks. I’m v̲e̲r̲y̲
> > > disappointed.
> > > Debian is becoming untenable. Years ago, I had hoped it won’t.
> >
> > I've been meaning to send a note about this for some time now, but
> > as I feel it keeps getting ignored, it always seems a bit
> > pointless.
> >
> > But in any case, given that merged-usr-via-aliased-dirs is not
> > really
> > supported by dpkg anyway, it is broken by design [B], I have no
> > intention whatsoever to break any of my systems with such layout
> > going
> > forward, I'm thus planning to spend any necessary volunteer time
> > implementing any fix, workaround or solution required to avoid
> > having
> > to use it, in detriment of other Debian volunteer time. I already
> > started some time ago with dpkg-fsys-usrunmess(8), present already
> > in
> > the upcoming bullseye release.
> >
> > [B] <
> > https://wiki.debian.org/Teams/Dpkg/FAQ#Q:_Does_dpkg_support_merged-.2Fusr-via-aliased-dirs.3F
> > >
> >
> > Thanks,
> > Guillem
>
> Hi,
>
> As it has been said and written many times already, in reality this
> is
> not broken by design at all and in fact it is the only successful
> strategy that has been deployed by other distros - it's what is being
> called merged-usr-via-moves-and-symlink-farms that is broken. We can
> say this with certainty because both approaches have been tried, so
> there's actual real-world data to look at. Just go look at the
> absolute
> mess that Suse got themselves into by following that solution - a 10-
> years-long massive half-done-never-finished headache that took an
> inordinate amount of work to back out of, and move to the actual
> working solution that everybody else are using - merged-usr-via-
> aliased-dirs. On the other hand Fedora/RHEL had a smooth and simple
> transition using merged-usr-via-aliased-dirs, and that was the end of
> it.
>
> Dpkg has some very minor bugs that rpm/dnf/yum/zypper/whatever do not
> suffer from. So what? It is perfectly normal as it's software and all
> softwares have bugs. They could be fixed, worked around, or ignored,
> like all other bugs.
>
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