Where does Gnucash save it backup files when using mysql data source

[L. D. James]

I have found the backups of gnucash to be very invaluable.  In order to 
facilitate a client with their accounting (access from home and work) 
I'm exploring the mysql data feature.

I'm having problems locating where the backups are stored.  Can someone 
help?

Thanks.

-- L. James

-- 
L. D. James
ljames at apollo3.com
www.apollo3.com/~ljames