Index location for multiple servers

I have a rails app that is going to be deployed across several servers.

In my understanding of acts_as_ferret, the index files are kept in the
index folder in the root of the rails app.  This won't work for multiple
servers, of course, since all the servers will have their own directory
tree.

How are people using ferret for apps deployed on multiple servers?
Could I run the index files through the database much like I do with
session info to prevent this problem?  Or is there a completely
different work around that I am just not thinking of?

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