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Re: Subversion questions

From: Olivier Fourdan <olivier.fourdan_at_tso.transiciel.com>
Date: 2003-05-22 10:23:30 CEST

On Wed, 2003-05-21 at 18:46, Paul L Lussier wrote:

> Did you check the Subversion book? It's available in source form if
> you downloaded the source tree, or on-line at the Subversion website.
> It should contain the answers to all your questions.
> (It may *not* contain all the answers, but it *should* :)

Sure, I did, I took about a week reading that book and evaluating
Subversion :)

That's indeed a very helpful documentation (such good documentations on
developping Open Source projects aren't that common)

> >1) Does migrating the repository data from an architecture to another
> >one requires any special procedure ? For example, what if someone hosts
> >his repository on a Win32 (or MacOS X) system and later wants to migrate
> >to a Linux or UNIX server for hosting his data under subversion.
> You should be able to simply 'svnadmin dump' the repo on one system,
> redirect to a file, then 'svnadmin load' that file on the other
> system.

Well, okay. I was mainly worried about the line terminators between
platforms, but I guess svnadmin dump/load takes care of such issues.

> >2) Does upgrading Subversion requires (or will require in a near future)
> >any special procedure for the existing repositories ? Basically, if
> >someone uses Subversion right now, does a migration is to be planned
> >when Subversion 1.0 comes out, for example ?
> My understanding is that if you keep up with the releases, there is
> nothing to worry about, and that a best effort toward
> backward compatibility is made for at least one revision. So, if you
> are running 0.22 and svn 0.23 is released, then your safe. If you
> continue on with 0.22, and 0.27 is released, there are no guarantees.
> However, this should also be solved using the svnadmin dump/load
> procedure if I followed the earlier discussion on this correctly.


> >3) Backuping the server data (Berkely DB) requires a shutdown of the
> >database or the backup can be performed with Subversion being running
> >and accessed ?
> Well, Berkeley DB is not like a typical RDBMS in that there's a
> process to shut down or start up. You can copy the db files anytime
> you want, however, you may wish to guarantee that there is no
> activity operating on those files when the copy is made. So, it is
> recommended that you prevent access to the Subversion server while
> the backups are being performed. This may be as simple as shutting
> down Apache, or, as complex as preventing SSH access to the system as
> well.

Well, that was my point actually. I realize that my question was mainly
a Berkeley DB question than actually a Subversion question, so I really
appreciate your answer.

> >4) How does Subversion scale ? Can it support (or will it support) huge trees ?
> Can you define 'huge' trees? There are some large repositories
> listed on the Subversion website on the order of 1+GB. There is at
> least one which is over 7GB. Is that large by your definition?

That's huge :) Much interesting point.

> The best way to learn about Subversion is to use it and to subscribe
> to this list. I highly recommend it.

Okay, I'm convinced, I've subscribed :)

Thanks (you and everybody who took time to answer my questions) for
answering, I really appreciate it,


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Received on Thu May 22 10:22:27 2003

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