[OpenAFS] Looking for sites running AFS across one or more WANs

[Derrick J Brashear]

On Tue, 27 Jan 2004, Michael Loftis wrote:

> > Also replicate the RO-Data among your servers for better performace.  If
> > you do this at least all RO-Data will be accessible from both sites in the
> > case of link failure for both sites.
>
> Here's a question I have....I haven't really researched it yet much, but
> what about 'split brain'?  IE where the two sites end up split, and you end
> up with a DB 'master' at each site, and then end up with conflicts in the
> protection, volume, etc. DBs?  How does ubik(?) handle this?  A FAQ entry
> pointing it out or a manual page or something would be sufficient.

It can't happen. There can be only one best site in a cell with only 2
database servers, and it will win; the other site wouldn't write the
database.