On Tue, 23 Jun 2009, Martin Langhoff wrote:
On Tue, Jun 23, 2009 at 10:33 PM, Seth Vidal<skvidal@xxxxxxxxxxxxxxxxx> wrote:
they're not insolvable - they are just very very very hard.
:-)
At the end of the day, if the OS doesn't give you atomic multi-file
transactions, and your %pre/%post scripts aren't also written
perfectly atomically, I would say that it _is_ impossible.
In any case, are there reasons to believe that behaviour in rpm has
improved (in F11) in the face of a powerloss in the middle of a
transaction? If we start doing OS upgrades and removing power at
random points, what chance does rpm of recover/resume?
It is an admittedly hard question.
So here's the short version:
if you're doing an upgrade via yum, it writes out all of what it was
intending to do. And it will ( to some extent) try to play back out the
remaining steps if it is interrupted. This is what
yum-complete-transaction does.
However, I would not say it is foolproof or even just
mildly-dumb-person-proof.
-sv
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