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Re: What happens if the repos is accessed during upgrade?

From: <kmradke_at_rockwellcollins.com>
Date: Tue, 27 May 2008 14:18:02 -0500

"Mark Phippard" <markphip_at_gmail.com> wrote on 05/27/2008 12:17:24 PM:
> On Tue, May 27, 2008 at 12:28 PM, Dave Lawrence
> <dlawrence_at_ad-holdings.co.uk> wrote:
> > If when svn 1.5 finally arrives I do
> >
> > svnadmin upgrade repos
> >
> > 1) How long will it take (rough guess) on a 2GB repos with about
> > revisions. Are we talking minutes here or hours?
> Seconds. It essentially just bumps an internal format number. See
> the release notes for some details:
> http://subversion.tigris.org/svn_1.5_releasenotes.html#repos-upgrades
> > 2) What happens if someone tries to access the repository during that
> > process?
> >
> > We use Apache on Linux
> I believe it will lock the repository in the same way a commit would.
> If you are using fsfs repositories you might ultimately want to
> dump/load the repository to completely upgrade. This would get you
> the new "sharded" repository format and a more efficient
> node-origins-index cache.
> One way to potentially do an upgrade is to use svnsync. You can
> create a new 1.5 repository and use the 1.5 version of svnsync to
> populate it while the current repository stays live. When the process
> ends, you can just swap the repositories when you have a convenient
> window.

Will this preserve any file locks from the old repository? I know
that a dump/load process doesn't. Is it feasible that a
script could help propagate locks?

Kevin R.

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Received on 2008-05-27 21:18:32 CEST

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