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Re: svn commit: r21745 - branches/fs-atomic-renames/notes

From: Garrett Rooney <rooneg_at_electricjellyfish.net>
Date: 2006-10-03 23:24:03 CEST

On 10/3/06, Karl Fogel <kfogel@google.com> wrote:
> rooneg@tigris.org writes:
> > +What's wrong with this? Well, what if we need to rename A/B to X/Y so that
> > +we can later rename X/Y to A/B? Not sure if there's a work around for that,
> > +but I'm also not sure if there's a way to get that into the system anyway.
> I think when something like that happens in a single commit txn, we'd
> just "fold it down" (or "reduce to lowest common denominator", to use
> one more metaphor before actually saying exactly what I mean).
> In other words,
> mv A/B X/Y
> mv X/Y A/B
> should reduce to a no-op. Do we actually do this folding right now?
> I'm not sure; I think we should, though.

That's assuming that those are intended to be sequential, I was
assuming that they were intended to be simultaneous (i.e. swap the
locations of A/B and X/Y), which we can't actually do at this point.


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Received on Tue Oct 3 23:24:30 2006

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