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Re: Proposal: Change repository's UUID over RA layer

From: Branko ─îibej <brane_at_xbc.nu>
Date: Fri, 06 Aug 2010 16:34:45 +0200

On 06.08.2010 16:30, Hyrum K. Wright wrote:
> On Fri, Aug 6, 2010 at 9:24 AM, Greg Stein <gstein_at_gmail.com> wrote:
>> On Fri, Aug 6, 2010 at 10:15, Ramkumar Ramachandra <artagnon_at_gmail.com> wrote:
>>> Hi Greg,
>>> Greg Stein writes:
>>>> Why would an admin install a hook to allow changing a UUID? Why would
>>>> a UUID be allowed to change over time? If a UUID is supposed to be
>>>> changed, then why wouldn't that admin just do it himself? Why does
>>>> this have to be allowed remotely?
>>> Agreed- this feature has a very narrow usecase. Anyway, since I
>>> started the thread, let me explain the motivation for this feature. It
>>> derives from `svnrdump` -- Anybody without administrative priviliges
>>> can actually mirror a complete Subversion repository using `svnrdump
>>> dump | svnrdump load` quite efficiently. Let's say some sponsor wants
>>> to provide a mirroring service- with the proposed feature the person
>>> will simply have to create a blank repository and enable
>>> pre-revprop-change/ pre-uuid-change on and wait for someone to load
>>> the content into that repository. After the intial mirroring is done,
>>> he can always turn off the pre-uuid-change. It's probably a
>>> "dangerous" feature, and I don't know if it's worth the trouble.
>> I disagree that the UUID should be mirrored. You're loading a *NEW*
>> repository. Thus, it should not have the same UUID as the original.
>> The original continues to exist. Having two repositories with the same
>> UUID is just wrong. That is contrary to the entire design principle..
> Agreed. *Universally Unique* Identifier.

Ahem. You guys have forgotten about Justin's RW-master/RO-slave
replication hack, which *requires* the slave repositories to have the
same UUID as the master. And that 'svnadmin load' has both --ignore-uuid
and --force-uuid.

-- Brane
Received on 2010-08-06 16:35:32 CEST

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