On Tue, Feb 05, 2008 at 09:11:26PM +0100, Casper.Dik at Sun.COM wrote:
> So what will happen when you lvieupgrade the same partition twice without
> even once booting into it?   That's easily done and should not cause
> any breakage.

Well, our class action scripts tend to be written so this just works.

Postrun uses should also be idempotent.

I asked earlier about class action scripts because there will be, surely
(right?) be cases where we'll need class actions to run when the system
boots, and if we don't have the infrastructure for it then it will be
surely re-invented multiple times, some of them badly.

Also, to what service should updates of, say, /etc/passwd, belong?
Sure, today updates of that specific file can run in normal class action
files, but use your imagination -- I'm talking about files which don't
belong to any one service but which must be updated early on.  Which
service should update them?  Probably a new one.

Nico
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