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Re: File Locking on Win9x, and FSFS repositories

From: Branko ─îibej <brane_at_xbc.nu>
Date: 2005-08-19 07:42:17 CEST

Ben Collins-Sussman wrote:

>
> On Aug 18, 2005, at 6:03 PM, Max Bowsher wrote:
>
>>
>> If not for compatibility, yes, that would be the way to do it, BUT
>> there is a problem. The lockfile is located outside the db/
>> directory, which is the the "fs" which is handled by libsvn_fs. In
>> other words, a svn repository is a libsvn_fs FS nested within a
>> libsvn_repos "repos", and it would be a violation of the layered
>> design for the inner layer to assume things about the implementation
>> of the outer layer.
>
>
>
> So why can't libsvn_fs_base create a new 'lockfile' inside repos/db/,
> and start doing all the shared/exclusive locking on that? The
> lockfile sitting outside repos/db/ won't be created at all for new
> repositories, and will just bit-rot in older repositories.

He has a point, though. If you access the repository with a 1.3
mod_dav_svn and a 1.2 svnadmin at the same time, the locking won't work
correctly (even if the repository format didn't change otherwise).

Can we forbid this according to our compatibility rules? I don't know...
We'd certiainly have to bump the repository format version.

-- Brane

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Received on Fri Aug 19 07:43:14 2005

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