Code name for 9.1.0
pgf at laptop.org
pgf at laptop.org
Thu Jul 17 09:33:28 EDT 2008
[ greg -- be sure fix the subject when replying to a digest. ]
> Hi Martin,
> We need keep that capability of upgrade from anywhere to anywhere if at
> all possible! That is a huge benefit for our customers and for our
> managing the scope of testing.
> Even if we can just keep that from any 70x forward it will be a big help.
> I know we hope 8.2.0 is rock solid but it may not be so we need an
> option to downgrade safely.
downgrade is _very_ difficult to get right. it's a worthy goal,
but given our testing resources, and the natural concentration of
both developers and testers on the upgrade scenario, i wouldn't
promise downgrade. (and from what cscott has said to me every time
i mutter under my breath about upgrade oddness, i'm under the
impression that the "boot to previous version" is really only
a failsafe mechanism to keep the box running until your upgrade
is successful, and isn't intended as a true "downgrade". correct
me if i'm wrong, scott.)
> BTW on this issue below, I just talked to a sugar engineer and they plan
> to fix that before we ship 8.2.0.
> Greg S
> > Date: Thu, 17 Jul 2008 16:25:17 +1200
> > From: "Martin Langhoff" <martin.langhoff at gmail.com>
> > Subject: Re: Code name for 9.1.0
> > To: "Morgan Collett" <morgan.collett at gmail.com>
> > Cc: richard at laptop.org, devel at lists.laptop.org
> > Message-ID:
> > <46a038f90807162125g76c3d586qd3d93b3060482f9d at mail.gmail.com>
> > Content-Type: text/plain; charset=ISO-8859-1
> > On Wed, Jul 16, 2008 at 1:16 AM, Morgan Collett
> > <morgan.collett at gmail.com> wrote:
> >> With olpc-update, it's not critical to update from version x to
> >> version x+1 - we can skip versions as we don't depend on a particular
> >> package state. (e.g. You can upgrade from 650 to joyride without
> >> having to upgrade to 703 first...) In the future that could become
> >> significant though if we have system changes affecting datastore
> >> format changes or something which might make support easier if
> >> upgrading from a known version.
> > I don't think that the ability to skip versions is going to hold long term.
> > The current setup is that olpc-updte does away with all the post-inst
> > and related hooks, which means that running code has to have the
> > smarts to upgrade/downgrade stored data formats (user documents,
> > configuration options, etc). This can get burdensome quickly.
> > As of now for example, the promise of olpc-update (of booting back to
> > the older version sanely) is broken between update-703 and current
> > joyride as the ds format has changed in an incompatible way, and
> > update-703 cannot read the new layout.
> > cheers,
> > m
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paul fox, pgf at laptop.org
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