On 8/13/2016 12:29 PM, Adam Jensen wrote:
> On 08/13/2016 02:21 PM, David Chapman wrote:
>> On 8/13/2016 11:07 AM, Adam Jensen wrote:
>>> When a branch is created, are the files under revision control in the
>>> trunk copied to the branch (is there any duplication of files in the
>>> repository)?
>> No, the files are not copied; a rename is stored. These are "cheap
>> copies", and this is an advantage over simple backups - if you want to
>> save history using backups (per another suggestion), you need to retain
>> one backup per significant event. That can add up.
> Thanks! That's a critical issue for my case where there is a large &
> growing core data-set and where it might be useful to have hundreds of
> branches, each representing a particular configuration of a subset,
> slice, or view of the core data-set.
>
>> Subversion is most often used to store text files because it stores
>> intra-file deltas when content is modified. Your use case is unusual,
>> but as long as you don't make a lot of changes to the binary files, it
>> will be efficient.
> Thanks [again] for the [vindicating] confirmation. I am inspired to set
> up a test case and explore this approach further :)
>
> Since, in my case, the binary files should/must never change, is there a
> way to configure a read-only attribute on specific files in the
> repository such that any subsequent attempt to check-in a change to any
> of those files will be rejected and an alert raised? The directory
> structures should remain changeable.
>
>
>
I don't know about an attribute, but you could define a hook script that
would check the files being committed to ensure that no existing large
binary files are being modified. I haven't done any work with hook
scripts for several years, so I'll have to let someone else assist if
you have more questions.
--
David Chapman dcchapman_at_acm.org
Chapman Consulting -- San Jose, CA
Software Development Done Right.
www.chapman-consulting-sj.com
Received on 2016-08-13 22:16:46 CEST