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Re: Recovering repository with multiple missing rev/ files

From: Eiren Smith <eirens_at_gmail.com>
Date: Tue, 15 Jun 2010 16:37:34 -0400

On Jun 15, 2010, at 4:25 PM, Stefan Sperling wrote:

> On Tue, Jun 15, 2010 at 03:59:10PM -0400, Eiren Smith wrote:
>> On Jun 15, 2010, at 11:31 AM, Stefan Sperling wrote:
>>> ...
>>> Can you still create dumpfiles containing the revisions that
>>> did not get lost? If so, you could stitch together a new repository
>>> and fill in the missing revisions manually (if you still know what
>>> happened in those revisions, or can guess what happened).
>>> See the svnbook section on rewriting history:
>>> http://svnbook.red-bean.com/nightly/en/svn.reposadmin.maint.html#svn.reposadmin.maint.filtering
>>> ...
>>> Stefan
>> I don't know how to get past the first revision file that's missing.
>> When I do an svnadmin dump from the files, it stops at the first
>> missing revision file and won't go further.
> You cannot dump the broken revisions.
> Let me try to better explain what I meant by providing a small
> example:
> Say only revision 10 was broken.
> You'd first create a dump with revisions 1 to 9:
> svnadmin dump -r1:9 repos > dump1
> Then load that part into a new repository:
> svnadmin create newrepos
> svnadmin load newrepos < dump1
> Then get a working copy from that repository, re-create any changes
> made in r10, and commit.
> Then you can go on with r11 and following:
> svnadmin dump --incremental -r11 repos > dump2
> svnadmin load newrepos < dump2
> In this example only one revision was broken and skipped during dump.
> You may have to do this multiple times since you lost more than one
> revision.
>> Does anyone know how to get some SVN tool to ignore or handle those
>> missing revs/ files so I can perform some repo surgery and get it
>> working despite the seven missing revs files?
> The commit you make to create r10 will create revision properties, but
> their values won't match what you originally had before losing your
> disk.
> However, you can easily change the values by using the svadmin
> setrevprop
> command. There is no need to tweak any files in the repository
> filesystem
> directly.
> Hope this helps,
> Stefan


Thank you very much for your clarification and your help so far.

I considered doing it the way you described. Unfortunately, most of
the seven (7) missing revisions are for binary files (DLLs and DOCs)
and so I can't reproduce their variations by hand. And since SVN is
storing binary deltas, not entire files, for each commit, I believe I
would have to reproduce them perfectly to get this particular solution
to work.

Any ideas how to get around this or where to go from here?


Received on 2010-06-15 22:38:16 CEST

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