We are looking at deploying Concrete5 in a stateless environment (multiple application servers). They will have a shared DB cluster (possibly Google Cloud SQL) and multiple small app servers. I'm concerned about the "/files" part of the share, how can I put that on persistent storage? Google Cloud Storage would be an option if I can work out whether Concrete5 supports it. There will be some kind of load balancer in front, sticky sessions can be applied if that helps.

Tech Details:

* Centos 6.3 64-bit
* Concrete5 version 5.6

How is this problem typically solved? NFS shared storage?