Re: Subversion and Very,Very Large Repositories

[Vincent Starre <vs...@comcast.net>]

Phil Endecott wrote:

> Russ Brown wrote:
>
>>> In general, Subversion can handle very large repositories.  The one 
>>> scalability issue I am aware of is if you create a flat repository, 
>>> that does not scale well.
>>
>>
>> I'm not sure how this would make a difference. FSFS doesn't store the
>> files in the repository in physical folders on the disk: only as a
>> series of revisions. From what I remember, filesystem lookup performance
>> becomes a potential issue for fsfs only when you have a very large
>> number of revisions: not when you have a a flat file structure in the
>> repository.
>>
>> Or does the Subversion filesystem have a similar lookup performance
>> issue?
>
>
> IIRC, the FSFS revision file contains a small amount of data for every 
> file in a directory where some files have changed, even for files that 
> have not changed.  If you have a directory with many thousands of 
> files, this can become an issue.
>
> --Phil.


May be worth noting: I don't think svn support holding a repos across 
multiple filesystems. While it's likely anyone dealing in TBs has a nice 
array, you could be in trouble if you dont.

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Re: Subversion and Very,Very Large Repositories

[Ryan Schmidt <su...@ryandesign.com>]

On Mar 1, 2006, at 02:28, Vincent Starre wrote:

> May be worth noting: I don't think svn support holding a repos  
> across multiple filesystems. While it's likely anyone dealing in  
> TBs has a nice array, you could be in trouble if you dont.

I remember reading somewhere that it is perfectly fine to move old  
revisions to a different volume and symlink these back in place.

Ah yes, here it is:

http://svn.collab.net/repos/svn/trunk/notes/fsfs

"If an FSFS repository is outgrowing the filesystem it lives on, you  
can symlink old revisions off to another filesystem."



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