Re: [PATCH 2/2] git-svn: allow git-svn fetching to work using serf

[Kyle McKay <mackyle@gmail.com>]

I forwarded the "SVNAllowBulkUpdates Off" question to the users@subversion.apache.org 
  list and here's the reply:

On Jul 7, 2013, at 11:11, Lieven Govaerts wrote:
> On Sun, Jul 7, 2013 at 4:48 PM, Kyle McKay <mackyle@gmail.com> wrote:
>> On Jul 7, 2013, at 06:39, Daniel Shahaf wrote:
>>>
>>> Kyle McKay wrote on Sat, Jul 06, 2013 at 19:46:40 -0700:
>>>>
>>>> On Jul 6, 2013, at 19:23, Jonathan Nieder wrote:
>>>>>
>>>>> Kyle McKay wrote:
>>>>>
>>>>>> Unless bulk updates are disabled when using the serf access  
>>>>>> method
>>>>>> (the only one available with svn 1.8) for https?: urls,
>>>>>> apply_textdelta does indeed get called multiple times in a row
>>>>>> without an intervening temp_release.
>>>>>
>>>>>
>>>>> You mean "Unless bulk updates are enabled" and "without an  
>>>>> intervening
>>>>> close_file", right?
>>>>
>>>>
>>>> The problem seems to be skelta mode although it may just be the  
>>>> fact
>>>> that ra_serf has multiple connections outstanding and since  
>>>> ra_neon only
>>>> ever has one it can't happen over ra_neon.
>>>>
>>>> If the server disables bulk updates (SVNAllowBulkUpdates Off) all
>>>> clients are forced to use skelta mode, even ra_neon clients.
>>>
>>>
>>> As Brane and I have pointed out, git-svn can instruct libsvn_* to  
>>> use
>>> bulk updates regardless of the server version, by setting
>>> SVN_CONFIG_OPTION_HTTP_BULK_UPDATES (new in 1.8).
>>>
>>> If you have questions about that, though, please address them to
>>> users@subversion.apache.org (the proper list for API usage  
>>> questions),
>>> not to me personally.
>>
>>
>> According to the table at
>> <http://subversion.apache.org/docs/release-notes/1.8.html#serf-skelta-default 
>> >,
>> if the server sets SVNAllowBulkUpdates Off, the client will be  
>> forced to use
>> skelta no matter what the client setting is.
>
> Indeed, the server admin has the final say in which mode is actually
> used. SVNAllowBulkUpdates Off is only advised if the server admin
> wants a log line per accessed resource. I doubt it's used a lot, but
> the option is there.
>
>>
>> Is that table incorrect?
>
> No, that table is correct.
>
> Lieven

So the final say so on whether or not bulk updates are allowed is on  
the server side which means git-svn really needs to handle skelta mode  
on the client side properly when using ra-serf to guarantee  
functionality with all subversion server configurations.

Kyle