Mailing-List: contact users-help@subversion.apache.org; run by ezmlm
Precedence: bulk
Subject: Re: difference between 1.8.1x and 1.9.9 in UUID creation/handling
To: users@subversion.apache.org
References: <53a2d3d5-ca81-3de9-bc46-95cbb348dace@gmx.de>
From: Stefan <luke1410@posteo.de>
Message-ID: <278c39e5-aa5e-607a-55ff-cb453f31b528@posteo.de>
Date: Wed, 15 Feb 2017 23:02:24 +0100
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archived-at: Wed, 15 Feb 2017 22:02:32 -0000

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Hi Olli,
On 2/15/2017 22:32, olli hauer wrote:
> Hi,
>
> I just noticed a UUID difference between svnadmin 1.8.15 and 1.9.5, but=
 haven't found the documentation for this behavior
> Is it normal to have two UUID's per default if the repo is created with=
 svnadmin 1.9.x?
>
>
> Test with svn 1.8
> $ svnadmin create new_repo
> $ svnadmin dump old_repo/ | svnadmin dump new_repo/
> $ cmd old_repo/db/uuid new_repo/db/uuid ; echo $?
> 0
>
>
> Test with svn 1.9.4/1.9.5
> $ svn info file:///path/to/old_repo | grep UUID
> Repository UUID: 228ca703-1480-e111-95e2-001999006c86
>
> $ cat old_repo/db/uuid
> 228ca703-1480-e111-95e2-001999006c86
>
> $ svnadmin create new_repo
> $ cat new_repo/db/uuid
> ee6bf0e3-c2f3-e611-bd38-000c2934dcba
> 936cf0e3-c2f3-e611-bd38-000c2934dcba   <-- there is a second UUID
>
>
> $ svn info file:///path/to/new_repo | grep UUID
> Repository UUID: ee6bf0e3-c2f3-e611-bd38-000c2934dcba
>
>
> Dump / Load into new_repo
> $ svnadmin dump old_repo/ | svnadmin dump new_repo/
>
> $ cat new_repo/db/uuid
> 228ca703-1480-e111-95e2-001999006c86    <-- the old repo UUID
> e2e3759b-c3f3-e611-bd38-000c2934dcba    <-- the old (first) UUID before=
 the load cycle
>
> $ svn info file:///path/to/new_repo | grep UUID
> Repository UUID: 228ca703-1480-e111-95e2-001999006c86
have a look at this thread. This should explain the principles a bit:
http://mail-archives.apache.org/mod_mbox/subversion-dev/201702.mbox/%3C95=
a2cd32-c45a-f997-e51d-a4d86e9902f5%40apache.org%3E

Note that the second line in the UUID file is not the "real" UUID
(that's the first one) and it's related to the fsfs-format whether you
have a second line or not (it got introduced in fsfs format 7 which is
the default fsfs-format when you create a repository with SVN 1.9).

Regards,
Stefan


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