Ryan Schmidt wrote:
> On Oct 25, 2007, at 10:13, t-man wrote:
>
>> I am curious to about the potential ill effects (if any) of having two
>> servers working off the same repository.
>>
>> The scenario would be as follows:
>>
>> Server A and Server B, both with the same repository that resides on a
>> SAN mounted via nfs and the SAN being handled by GFS from RedHat, with
>> a load balancer sitting on top.
>>
>> Part of me says that GFS would handle potential issues with concurrent
>> writes - but the other part of me is afraid of the some operations
>> blitzing the repository...
>>
>> Am I off the mark completely, or does anyone have a similar setup
>> working somewhere, and if so, have they noticed any issues with that?
>
> I have not personally tried it. But there was previous discussion about
> this on the list, and I was led to understand that a SAN with a cluster
> filesystem, such as Apple's Xsan, would adequately insulate the various
> repository servers from one another so that they would not clobber the
> repositories served on the SAN. I am not familiar with GFS so I don't
> know whether it's a cluster filesystem or how it compares to Xsan.
There is a company that had this setup and the two heads both decided that they
owned the physical disk at the same time and ended up corrupting the filesystem.
They had off-site backups and were able to make a new filesystem and restore
from the backup.
Also, svn doesn't consume a large amount of resources, so it doesn't need this
complicated of a set up. A single box can easily serve the traffic, just make
sure you do post-commit hot backups of each commit and save them in multiple
locations.
Blair
--
Blair Zajac, Ph.D.
http://www.orcaware.com/svn/
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Received on Fri Oct 26 18:59:58 2007