[svk-users] Two instances of SVK conflicting?

[Michael Brouwer]

This and other locking bugs were fixed in svk 2, perhaps you should  
upgrade?

Michael

On Nov 23, 2007, at 6:35 PM, Ethan Mallove wrote:

> On Wed, Nov/21/2007 10:23:36PM, Micah Elliott wrote:
>> On 2007-11-21 Ethan Mallove wrote:
>>
>>> Does SVK support two instances of the svk command checking
>>> out from the same repository at the same time? E.g.,
>>
>> That should work fine.  Parallel checkouts should not be a
>> problem... as long as they are not to the same destination.
>>
>>> in one shell:
>>>
>>>  $ svk co /foo/bar
>>>
>>> in another shell:
>>>
>>>  $ svk co /foo/bar
>>
>> This is pathological.
>>
>
> I'm in different directories in the above case. E.g., to
> clarify, it is like this:
>
>  in one shell:
>
>    $ pwd
>    /tmp/dir1
>    $ svk co /foo/bar
>
>  in another shell:
>
>    $ pwd
>    /tmp/dir2
>    $ svk co /foo/bar
>
> SVK will say "/foo/bar already locked". So I do this
> (which I would think is wrong):
>
>  in one shell:
>
>    $ pwd
>    /tmp/dir1
>    $ svk co /foo/bar
>
>  in another shell:
>
>    $ pwd
>    /tmp/dir2
>    $ svk cleanup --all && svk co /foo/bar
>
> FWIW, Mercurial *waits* for the lock to free up, and then
> continues the operation instead of exiting. Does maybe a
> later SVK version do this?
>
>>
>> I wouldn't consider it an svk limitation.  The problem is
>> that you've got two processes trying to write to the same
>> paths at the same time.  If you serialized those two
>> checkouts you'd see svk report something to the effect of
>> "no work to do" on the second checkout.  But since in your
>> case both are midstream, there is a race condition to
>> check existence of and write the same files.
>>
>> Why would this situation ever arise in practical usage?
>
>  $ svk checkout /foo/bar architecture-1
>  $ svk checkout /foo/bar architecture-2
>  $ svk checkout /foo/bar architecture-3
>  $ ...
>
> -Ethan
>
>
>>
>> -- 
>>                          _ _     ___
>>                          |V|icah |- lliott
>>                          " "     """
>> mde at MicahElliott.com            <><             http://MicahElliott.com
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