I believe that this would depend on the file system. I am pretty sure
that Windows has serious performance issues with a large number of files
in a single directory. Other file systems may have similar issues.
Miller, Eric wrote:
>> For example, suppose I have a repository with 100.000 files. Will it
>> take less time if all files are in the root directory (so the
>> repository does not have any subdirectories) than if I have lots of
>> directories and subdirectories where the files are scattered? If the
>> time to process each .svn directory is constant, processing one large
>> repository with everything in the root will take the same time as
>> processing an empty repository, which is much less time than the large
>> repository with the files scattered in lots of directories.
>>
>
> So you are really just wondering about the overhead of updating a
> hierarchical directory structure vs a flat one?
>
> Someone may correct me if I'm wrong, but reading/writing each
> .svn/entries file and creating/removing locks throughout the hierarchy
> would create additional disk thrash. AFAIK the optimal setup would be a
> flat structure.
>
> Should be easy enough to verify though - just create 2 repositories, one
> with 100k files in a directory and one with 100k directories with 1 file
> each and compare update times.
>
> Eric
>
>
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Received on Wed Oct 31 22:46:32 2007