Gluster users - Jan 2011 - subversion repos on top of GlusterFS?

I've some questions.

Is it possible to store subversion repositories and sql databases (mysql, 
postgres) on top of GlusterFS with good results?

If a file has growed up near to the volumes capacity, so that I must expand 
the volume by adding a new brick to it, how is storing of the for one brick to 
large file handled? Is it splitted into two or more smaller files by 
GlusterFS?

Thanks
Christian