Re: Parallel checkout (Was Re: 0 bot for Git)

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On Fri, Apr 15, 2016 at 01:18:46PM +0200, Christian Couder wrote:

> On Fri, Apr 15, 2016 at 11:51 AM, Duy Nguyen <pclouds@xxxxxxxxx> wrote:
> > On Fri, Apr 15, 2016 at 12:04:49AM +0200, Christian Couder wrote:
> >>
> >> There is a draft of an article about the first part of the Contributor
> >> Summit in the draft of the next Git Rev News edition:
> >>
> >> https://github.com/git/git.github.io/blob/master/rev_news/drafts/edition-14.md
> >
> > Thanks. I read the sentence "This made people mention potential
> > problems with parallelizing git checkout" and wondered what these
> > problems were.
> 
> It may have been Michael or Peff (CC'ed) saying that it could break
> some builds as the timestamps on the files might not always be ordered
> in the same way.

I don't think it was me. I'm also not sure how it would break a build.
Git does not promise a particular timing or order for updating files as
it is. So if we are checking out two files "a" and "b", and your build
process depends on the timestamp between them, I think all bets are
already off.

-Peff
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