Re: difference between 1.8.1x and 1.9.9 in UUID creation/handling

On 2017-02-15 23:02, Stefan wrote:
> 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/%3C95a2cd32-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
>

Hi Stefan,

thanks that was the missing part I haven't found in the release notes

-- 
Regards,
olli