After Samba proved too problematic for Geograph we switched to NFS and have enjoyed a good period of stability ever since. The webservers are barely breaking a sweat, but the load on our database is a little higher that I hoped. By no means maxed out, but definitely a lot more than it needs to be. The next week or so will be spent distributing some of that load to the webservers (like using memcached for session storage) and also looking at some of the heavyweight queries and tasks to see how they could be performed more efficiently….